LM Guide Actuator (full-ball type)

THK’s LM Guide (full ball type) represents a pinnacle of linear motion technology, engineered to deliver exceptional precision, rigidity, and longevity in demanding applications. This system features a unique recirculating ball design where the load-bearing balls make full contact with the raceways, distributing loads evenly across the entire ball surface. The guide comprises a rail and a sliding block (carriage) containing precisely engineered ball circuits. These circuits allow for infinite travel lengths by continuously recirculating the balls through a compact, efficient path within the block. Manufactured from high-carbon chromium bearing steel, the components undergo rigorous heat treatment and grinding processes to achieve superior hardness, dimensional accuracy, and surface finish, ensuring consistent performance under high loads and repetitive motion.

Key technical features include the full ball contact design, which maximizes load capacity and moment rigidity. The optimized ball groove profile ensures smooth, low-friction motion with minimal rolling resistance. Advanced sealing systems, often incorporating multi-layer contact seals and optional scrapers, effectively exclude contaminants like dust, chips, and moisture while retaining lubrication, significantly extending service life even in harsh environments. Many models offer preload options, allowing for the elimination of internal clearance to achieve zero backlash, which is critical for applications requiring high positional accuracy and repeatability. The compact, space-saving design of the sliding block facilitates easy integration into machinery with limited installation space.

The performance advantages of the THK LM Guide (full ball type) are substantial. It exhibits exceptionally high load capacities in all directions—radial, reverse radial, and lateral—as well as high resistance to moment loads (pitch, yaw, and roll). This results in unparalleled stability and vibration damping, crucial for maintaining precision. The low friction coefficient contributes to high mechanical efficiency, reducing driving force requirements and energy consumption. Its durability and maintenance-free operation, thanks to the effective sealing and long-term lubrication, minimize downtime and total cost of ownership. The system operates smoothly at high speeds with low noise levels, making it suitable for modern, high-throughput automation.

Typical applications span across critical sectors in industrial machinery, automotive systems, and precision equipment. In industrial automation, these guides are indispensable in CNC machining centers for tool changer arms, spindle drives, and feed axes; semiconductor manufacturing equipment for wafer handling robots and steppers; and precision assembly machines for pick-and-place units. The automotive industry utilizes them in robotic welding arms, painting robots, and precision test stands for component validation. Within precision equipment, they are found in medical devices like MRI and CT scanner beds, optical positioning stages, and coordinate measuring machines (CMMs), where smooth, accurate, and reliable linear motion is non-negotiable for achieving stringent performance standards.

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The THK LM Guide Actuator KR65 Motor Wrap represents a significant advancement in linear motion technology, integrating a full ball type LM guide with a precision actuator and motor wrap system. This design ensures exceptional rigidity, smooth motion, and high load capacity, making it ideal for demanding industrial applications. The KR65 model features a compact, robust structure with a fully recirculating ball bearing system that minimizes friction and wear, while the motor wrap provides seamless integration with servo or stepper motors for precise control and positioning. Key technical features include the full ball type LM guide, which utilizes a large number of precision-ground balls to distribute loads evenly across the raceway. This configuration enhances durability and allows for high-speed operation with minimal vibration. The actuator is engineered with preloaded ball screws to eliminate backlash, ensuring repeatable accuracy within microns. The KR65’s sealed design incorporates protective seals and wipers to prevent contamination from dust, chips, and liquids, extending service life in harsh environments. Additionally, the motor wrap facilitates easy mounting of motors, reducing installation time and maintaining alignment for optimal performance. The system supports high moment loads and offers customizable stroke lengths, lubrication options, and feedback devices to suit specific application requirements. Performance advantages of the KR65 are substantial, starting with its high positioning accuracy and stability, which are critical for precision tasks. The full ball recirculation reduces heat generation and energy consumption, contributing to efficiency and lower operational costs. Its high load capacity—supporting radial, reverse radial, and lateral loads—enables it to handle heavy components without sacrificing speed or precision. The actuator’s low noise and smooth operation make it suitable for noise-sensitive environments, while its maintenance-friendly design allows for easy inspection and relubrication. With a long service life due to hardened steel components and effective sealing, the KR65 minimizes downtime and total cost of ownership. Typical applications span various sectors, including industrial machinery where it is used in CNC machining centers for tool changing, palletizing systems, and automated assembly lines. In automotive systems, the KR65 excels in welding robots, painting equipment, and precision testing devices that require reliable linear motion under high loads. For precision equipment, it is employed in semiconductor manufacturing for wafer handling, optical inspection systems, and medical devices like automated analyzers, where hygiene and accuracy are paramount. Its versatility also extends to packaging machinery, where high-speed pick-and-place operations benefit from its rapid acceleration and deceleration capabilities. Overall, the THK LM Guide Actuator KR65 Motor Wrap delivers a blend of precision, durability, and adaptability, making it a cornerstone for advanced automation and motion control solutions.
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The THK LM Guide Actuator KR65, a full ball type linear motion system, integrates a precision LM guide with a compact ball screw actuator into a single, highly rigid unit. This design eliminates the need for separate guide and drive mechanisms, simplifying machine construction, reducing overall footprint, and enhancing alignment accuracy. The KR65 series is engineered for applications demanding high load capacity, exceptional rigidity, and smooth, precise linear motion over long strokes. Technically, the KR65's defining feature is its "full ball" recirculation system. Both the LM guide block and the ball screw nut employ a full-complement ball design, maximizing the number of load-carrying steel balls in contact with the raceways. This configuration significantly increases load capacity—supporting substantial moment loads in all directions—and dramatically enhances rigidity, minimizing deflection under force. The ball screw itself is a precision-ground type, ensuring high positional accuracy and repeatability. The integrated structure provides four rows of load-carrying balls in the guide section, offering high resistance to rolling and ensuring stable, non-fluctuating torque and smooth movement even under preload. Seals and wipers are strategically placed to effectively exclude contaminants like dust and chips while retaining grease, contributing to a long, maintenance-free service life and reliable operation in demanding environments. The performance advantages of the KR65 are substantial. Its high rigidity and load capacity translate directly into improved machining or assembly precision by resisting deflection from cutting forces or component weight. The system's compact, integrated design saves valuable space within machinery, allowing for more streamlined equipment layouts. The high efficiency of the ball screw drive ensures rapid traverse speeds and excellent positional accuracy, which is critical for automated processes. Furthermore, the robust construction and effective sealing contribute to exceptional durability and reliability, reducing downtime and total cost of ownership. Typical applications for the THK KR65 LM Guide Actuator are found across industries where robust, precise, and reliable linear motion is paramount. In industrial machinery, it is ideally suited for the axes of CNC machining centers, high-precision grinding machines, and automated assembly systems where it provides the backbone for precise tool or workpiece positioning. Within the automotive manufacturing sector, the KR65 is deployed in heavy-duty welding robots, precision parts transfer systems, and automated inspection stations, handling components with consistent accuracy. In the realm of precision equipment, it finds use in semiconductor manufacturing apparatus, such as wafer handling and testing machines, and in various stages of LCD panel production, where its smooth motion and rigidity are essential for handling delicate substrates without vibration or deviation.
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The THK LM Guide Actuator KR55 Motor Wrap represents a significant advancement in linear motion technology, integrating a full ball type LM guide mechanism with a high-performance motor to deliver exceptional precision, rigidity, and durability. This actuator is engineered to provide smooth, accurate linear motion in demanding industrial environments, making it an ideal solution for applications requiring high load capacity, minimal maintenance, and long service life. The KR55 model features a compact design that maximizes space efficiency while maintaining robust performance, ensuring reliable operation even under heavy loads and high-speed conditions. Key technical features of the KR55 include its full ball type recirculating system, which ensures uniform load distribution and reduces friction, leading to enhanced accuracy and prolonged component life. The actuator incorporates a precision-ground rail and block assembly, manufactured from high-quality steel, to withstand rigorous operational stresses. Its advanced sealing technology effectively prevents contamination from dust, debris, and moisture, making it suitable for use in harsh environments. The integrated motor wrap design allows for seamless connection with various motor types, facilitating easy installation and reducing setup time. Additionally, the KR55 offers high positional accuracy and repeatability, with minimal backlash, ensuring consistent performance in precision-driven tasks. Performance advantages of the THK LM Guide Actuator KR55 are numerous, starting with its ability to handle high loads and moments without compromising on speed or precision. The full ball type design minimizes wear and maintenance requirements, resulting in lower total cost of ownership over its lifespan. Its high rigidity and stability reduce vibration and noise, contributing to smoother operation and improved product quality in manufacturing processes. The actuator's efficiency in motion control allows for faster cycle times and increased productivity, while its durability ensures reliable performance in continuous or high-duty cycles. Typical applications for the KR55 span across various industries, including industrial machinery, where it is used in CNC machines, robotic arms, and automated assembly lines for precise positioning and movement. In automotive systems, it supports operations in welding robots, painting equipment, and component handling systems, where accuracy and reliability are critical. Within precision equipment, the actuator finds use in semiconductor manufacturing devices, medical imaging systems, and optical alignment tools, demanding ultra-fine motion control. Its versatility and robust design make it a preferred choice for engineers seeking to enhance the performance and longevity of their linear motion systems.
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The THK LM Guide Actuator KR55 represents a significant advancement in linear motion technology, integrating a full ball type LM Guide with a precision ball screw into a single, compact unit. This design eliminates the need for separate guide and drive mechanisms, simplifying machine design, reducing assembly time, and enhancing overall system rigidity. The KR55 is engineered for applications demanding high precision, heavy load capacity, and exceptional smoothness in motion. At the core of its technical features is the "full ball type" recirculation system within the LM Guide block. Unlike designs with fewer load-bearing elements, the KR55's guide block is packed with a maximum number of steel balls, ensuring a large contact area with the raceway. This configuration provides several key performance advantages. Firstly, it delivers an exceptionally high load rating, enabling the actuator to support significant moment loads and forces in all directions—radial, reverse-radial, and lateral. This makes it exceptionally stable under complex loading conditions. Secondly, the high ball count distributes the load more evenly, leading to minimal elastic deformation and superior rigidity. This rigidity translates directly into higher positioning accuracy and repeatability, as the actuator resists deflection during operation. The smooth recirculation of the full complement of balls also contributes to low noise and vibration levels, even at high speeds, ensuring quiet and stable performance. The integrated ball screw is precision-ground for high lead accuracy and efficiency, further enhancing the system's positioning capability and dynamic response. The robust construction and high-performance characteristics of the KR55 make it an ideal solution for a wide range of demanding industrial applications. In industrial machinery, it is commonly deployed in high-precision machine tools for critical axes, such as in CNC milling machines and grinding machines, where its rigidity and accuracy are paramount for achieving tight tolerances on machined parts. It is also found in automated assembly and inspection systems, where its smooth motion and reliability are essential for high-throughput production lines. Within the automotive manufacturing sector, the KR55 is utilized in precision welding robots, high-speed material handling gantries, and automated test equipment that requires consistent, heavy-duty performance under rigorous conditions. For precision equipment, its application extends to semiconductor manufacturing apparatus, including wafer steppers and wire bonders, and in medical device automation, where its cleanliness, smooth operation, and unwavering accuracy are critical. The THK LM Guide Actuator KR55, with its full ball type design, stands as a cornerstone component for engineers seeking to build machinery that is not only powerful and durable but also capable of the highest levels of precision.
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The THK LM Guide Actuator KR46 (full ball type) with motor wrap represents a high-performance integrated linear motion solution engineered for demanding industrial applications. This actuator combines a precision LM guide mechanism with a fully enclosed ball screw drive system and an integrated servo motor, creating a compact, self-contained unit capable of delivering exceptional accuracy, rigidity, and longevity. The defining "full ball type" design features a recirculating ball circuit that provides uniform load distribution across all rolling elements, significantly enhancing load capacity and moment rigidity compared to standard designs. The KR46 model is specifically engineered with a robust housing that fully wraps and protects the motor, screw, and guideway from environmental contaminants such as dust, chips, and moisture, ensuring reliable operation in harsh manufacturing environments. Key technical features of the KR46 actuator include its high-rigidity LM guide block with four rows of balls for superior load-bearing capacity in all directions—radial, reverse-radial, and lateral. The precision-ground ball screw offers high positioning accuracy and repeatability, while the pre-loaded ball nut minimizes backlash for precise motion control. The integrated servo motor is matched to the drive system for optimal performance, eliminating the need for external couplings and alignment. The unit is pre-lubricated for maintenance-free operation over extended periods and is available with various options, including different accuracy grades, screw leads, and motor specifications to suit specific application requirements. Seals and wipers are strategically placed to protect the critical rolling surfaces from particulate ingress, further enhancing the system's service life. Performance advantages are substantial, starting with high-speed capability and smooth, low-friction motion that results in improved cycle times and energy efficiency. The high rigidity of the system minimizes deflection under load, enabling precise positioning even during high-force operations. The integrated design simplifies machine assembly, reduces the overall footprint, and eliminates alignment issues common with traditional component-based systems. This leads to reduced installation time and cost. The durability of the full ball type construction ensures a long operational life with minimal maintenance, providing excellent total cost of ownership. The motor wrap design not only protects the motor but also contributes to a cleaner and safer machine design by containing moving parts and reducing noise. Typical applications for the THK KR46 LM Guide Actuator are found across industries requiring robust and precise linear motion. In industrial machinery, it is extensively used in automated assembly lines, precision machining centers for tool positioning, pick-and-place robots, and high-speed material handling systems. Within the automotive manufacturing sector, these actuators drive operations in welding robots, precision part transfer systems, and automated inspection equipment where reliability and accuracy are paramount. For precision equipment, the KR46 is ideal for applications such as semiconductor manufacturing machinery, medical device automation, and optical positioning systems where smooth motion, high repeatability, and contamination resistance are critical to process success.
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The THK LM Guide Actuator KR46 is a high-precision, full ball type linear motion system engineered to deliver exceptional rigidity, smooth operation, and long service life in demanding industrial applications. This actuator integrates a precision-ground LM guide rail and block with a built-in ball screw, creating a compact, highly efficient unit capable of handling significant loads with minimal friction. The "full ball type" design signifies that the recirculating ball bearings maintain continuous contact along the entire load-bearing raceway, ensuring uniform stress distribution and enhanced load capacity. This configuration is particularly advantageous for applications requiring high moment load resistance and precise, repeatable linear positioning. Key technical features of the KR46 include its robust construction, utilizing high-carbon chromium bearing steel for the rail and block to provide superior hardness and wear resistance. The ball screw is precision-rolled or ground, offering high accuracy grades to meet stringent positioning tolerances. The full ball recirculation system minimizes vibration and noise during operation, contributing to smoother motion profiles. Seals and wipers are integrated to effectively exclude contaminants like dust and chips while retaining lubrication, which is critical for maintaining performance in harsh environments. Preload adjustments can be made to eliminate backlash, ensuring high rigidity and positional accuracy under varying load conditions. Performance advantages are substantial, starting with its high load-carrying capacity in all directions—radial, reverse radial, and lateral. The KR46 exhibits excellent dynamic characteristics, capable of high-speed operation without sacrificing precision or stability. Its high rigidity allows for improved machining accuracy and surface finishes in equipment where it is deployed. The efficiency of the integrated ball screw reduces required drive torque, leading to energy savings and enabling the use of smaller, more cost-effective motors. Furthermore, the design promotes long-term reliability and reduced maintenance intervals, lowering the total cost of ownership over the system's lifecycle. Typical applications for the THK KR46 LM Guide Actuator are found across industries where precision, reliability, and durability are paramount. In industrial machinery, it is commonly used in CNC machining centers for tool changing mechanisms, high-speed milling and drilling heads, and precision grinding machines. Within automotive manufacturing systems, the actuator is ideal for robotic welding and assembly arms, precision parts handling and transfer systems, and automated inspection equipment. In the realm of precision equipment, the KR46 is deployed in semiconductor manufacturing apparatus for wafer handling and positioning stages, optical alignment systems, and high-accuracy measuring instruments. Its ability to provide stable, precise linear motion under heavy loads and at high speeds makes it a critical component in advancing automation and enhancing production quality.
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The THK LM Guide Actuator KR45H represents a significant advancement in linear motion technology, integrating a full ball type LM Guide with a precision actuator and motor wrap system to deliver exceptional performance in demanding industrial applications. Engineered for high rigidity, smooth operation, and long service life, this actuator is designed to handle heavy loads with minimal friction and wear. The KR45H features a compact, robust housing that encapsulates the guide mechanism, protecting it from contaminants while ensuring consistent alignment and stability. Its full ball type design employs a recirculating ball bearing system that maximizes contact area between the balls and raceways, distributing loads evenly and reducing stress concentrations. This results in higher load capacities, improved accuracy, and enhanced resistance to shock and vibration. The actuator is pre-loaded to eliminate backlash, providing precise positional control and repeatability essential for automated systems. Key technical features include the use of high-grade steel for all critical components, which are heat-treated to achieve superior hardness and durability. The LM Guide’s raceways are precision-ground to micron-level tolerances, ensuring smooth linear travel with minimal deviation. The integrated motor wrap allows for seamless connection to servo or stepper motors, facilitating easy installation and synchronization with control systems. The KR45H is available in various lengths and can be customized with different lubrication options, sealing systems, and mounting configurations to suit specific environmental conditions. Its design also incorporates optimized grease retention features, extending maintenance intervals and reducing downtime. Performance advantages are evident in its ability to operate at high speeds while maintaining low noise levels and minimal heat generation. The actuator’s efficiency translates into energy savings and reduced operational costs, making it an economical choice for continuous-use scenarios. In industrial machinery, the THK KR45H LM Guide Actuator is widely employed in CNC machining centers, where it provides precise axis movement for milling, drilling, and cutting operations. Its rigidity and accuracy ensure high-quality surface finishes and tight tolerances in manufactured parts. In automotive systems, this actuator is utilized in assembly lines for tasks such as robotic welding, component handling, and precision positioning of parts during installation. Its durability and resistance to harsh environments make it ideal for withstanding the rigors of automotive production, including exposure to dust, debris, and temperature variations. For precision equipment, the KR45H finds applications in semiconductor manufacturing, where it guides wafer handling robots and inspection stages with nanometer-level precision. It is also used in medical devices, such as automated diagnostic instruments and surgical robots, where reliability and hygiene are paramount. Additionally, the actuator supports automation in packaging machinery, material handling systems, and optical alignment devices, demonstrating its versatility across multiple sectors. By combining advanced engineering with practical design, the THK LM Guide Actuator KR45H delivers a reliable solution for enhancing productivity and precision in modern industrial and technological applications.
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The THK LM Guide Actuator KR45H, a full ball type linear motion system, integrates a precision LM guide with a ball screw into a single, compact unit designed for high-rigidity and high-precision applications. This actuator is engineered to provide smooth, accurate linear motion with exceptional load capacity and positioning repeatability, making it a cornerstone component in advanced automation and machinery. Its construction features a robust carriage block that travels along a hardened steel shaft, with a fully recirculating ball circuit in both the guide and screw sections ensuring consistent, low-friction operation. Key technical features define the KR45H's superior performance. The full ball type design incorporates a large number of precision balls within the LM block and nut, maximizing contact area to support substantial loads in all directions—radial, reverse-radial, and lateral. This configuration delivers high rigidity and minimizes elastic deformation under stress. The ball screw is precision-ground for high lead accuracy, while the integrated sealing systems, including scrapers and end seals, effectively protect the recirculating ball tracks from contaminants like dust and chips, ensuring long-term reliability and reduced maintenance needs. Pre-loaded ball elements eliminate backlash, providing precise positional control and excellent responsiveness to motion commands. Performance advantages of the KR45H are evident in its operational efficiency and durability. It offers high positional accuracy and repeatability, critical for applications demanding micron-level precision. The high rigidity allows for higher thrust capabilities and faster acceleration/deceleration rates without sacrificing stability. Its compact, integrated design simplifies machine assembly, reduces the number of components, and saves valuable space within machinery layouts. Furthermore, the optimized recirculation system and high-quality steel construction contribute to a long service life, smooth motion with low noise and vibration, and the ability to operate at high speeds with minimal heat generation. Typical applications for the KR45H LM Guide Actuator span various high-demand sectors. In industrial machinery, it is extensively used in CNC machining centers for tool changing mechanisms, precision grinding machines, and automated assembly systems where robust, precise linear movement is paramount. Within the automotive industry, it finds roles in welding robot positioning arms, precision parts handling equipment, and automated inspection stations on production lines. For precision equipment, the actuator is ideal for semiconductor manufacturing apparatus, such as wafer steppers and wire bonders, as well as in medical device automation and high-accuracy measuring instruments, where its reliability and precision ensure consistent, high-quality output.
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The THK LM Guide Actuator KR33 (full ball type) with motor wrap represents a highly integrated linear motion solution, combining a precision LM guide with a ball screw-driven actuator and a directly coupled servo motor into a single, compact unit. Engineered for applications demanding high rigidity, exceptional accuracy, and reliable performance, this system eliminates the need for separate component alignment and assembly, streamlining machine design and reducing installation time. The defining characteristic of the "full ball type" design is its use of a recirculating ball bearing system within both the guide block and the ball nut. This configuration provides a large contact area between the balls and the raceways, resulting in superior load capacity—handling moment loads and complex forces with high stability—and contributing to a long operational life with minimal maintenance. Key technical features of the KR33 actuator include its high rigidity, which is critical for minimizing deflection under load and maintaining positional accuracy. The preloaded ball screw and guide mechanism ensure virtually no backlash, enabling precise and repeatable positioning. The integrated servo motor wrap allows for a direct, synchronous connection, maximizing transmission efficiency and responsiveness for dynamic motion control. This design also contributes to a compact footprint, saving valuable space within automated machinery. Performance advantages are substantial, offering high-speed capability, smooth and quiet operation due to the optimized recirculation of balls, and excellent resistance to shock and vibration. The system is built for durability, capable of operating in demanding industrial environments. Typical applications for the THK KR33 LM Guide Actuator are found across industries where precision, reliability, and space efficiency are paramount. In industrial automation, it is extensively used in high-speed pick-and-place robots, precision assembly machines, and automated test and inspection equipment. Within the automotive manufacturing sector, these actuators are ideal for tasks such as precision welding, part handling and transfer in assembly lines, and operating within high-accuracy machining centers. For precision equipment, the KR33 is a key component in semiconductor manufacturing apparatus, including wafer handling and lithography stages, as well as in medical automation devices and precision measuring instruments. Its robust design and integrated nature make it a preferred choice for engineers seeking to enhance the performance, reliability, and compactness of their linear motion systems.
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The THK LM Guide Actuator KR33 represents a significant advancement in linear motion technology, integrating a precision LM guide with a high-efficiency ball screw into a single, compact unit. This full ball type actuator is engineered to deliver exceptional rigidity, smooth motion, and high positioning accuracy, making it an ideal solution for applications demanding reliable and precise linear movement. The KR33 model is characterized by its robust construction, featuring a fully supported ball recirculation system that ensures consistent performance even under heavy loads and high-speed operations. Key technical features of the KR33 include its full ball contact design, which maximizes load capacity and rigidity by distributing forces evenly across all rolling elements. This design minimizes deformation under stress, enhancing the actuator's ability to maintain precision in dynamic conditions. The integrated ball screw offers high efficiency and low friction, contributing to reduced energy consumption and extended service life. Additionally, the KR33 is equipped with seals and wipers that protect internal components from contaminants such as dust, chips, and moisture, ensuring durability in harsh industrial environments. Pre-loaded ball nuts and guide blocks eliminate backlash, providing repeatable positioning accuracy essential for precision tasks. Performance advantages of the KR33 are evident in its ability to handle high loads with minimal maintenance. Its compact design saves space in machinery layouts while offering high speed capabilities and smooth acceleration, reducing cycle times in automated processes. The actuator's low noise operation and vibration damping properties contribute to a quieter and more stable working environment. These attributes make it highly efficient, with long-term reliability that reduces downtime and total cost of ownership. Typical applications for the THK LM Guide Actuator KR33 span across various industries. In industrial machinery, it is commonly used in CNC machining centers, automated assembly lines, and material handling systems where precise linear positioning is critical. Within automotive systems, the KR33 finds roles in robotic welding arms, precision testing equipment, and component transfer mechanisms that require high load capacity and durability. In precision equipment, such as semiconductor manufacturing tools, medical devices, and optical inspection systems, its accuracy and smooth motion ensure consistent results in sensitive processes. Overall, the KR33 actuator provides a versatile and dependable solution for enhancing productivity and precision in modern automation and manufacturing.
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The THK LM Guide Actuator KR30H (full ball type) with motor wrap represents a high-performance linear motion solution engineered for demanding industrial applications requiring precision, rigidity, and long-term reliability. This integrated system combines a robust LM guide mechanism with a fully enclosed ball screw actuator and a directly coupled servo motor, delivering exceptional positioning accuracy and smooth motion control. The "full ball type" design features a recirculating ball bearing system within the guide block that maintains continuous point contact with the raceway, distributing loads evenly across multiple balls for enhanced stiffness and vibration damping. The KR30H series incorporates a precision-ground ball screw with preloaded nuts to eliminate backlash, ensuring repeatable positioning within micron-level tolerances even under high moment loads. Key technical features include the actuator's hardened steel construction with specialized surface treatments for corrosion resistance and extended service life. The integrated motor wrap provides complete environmental protection for the drive system, preventing contamination from dust, chips, and liquids in harsh operating conditions. The compact design minimizes overall system footprint while maintaining high load capacities in all directions - radial, reverse radial, and lateral. Advanced sealing technology with multiple labyrinth and contact seals retains lubrication while effectively excluding particulate matter, significantly reducing maintenance requirements. The system's optimized ball circulation path minimizes noise generation and heat buildup during high-speed operation, contributing to consistent performance across extended duty cycles. Performance advantages of the KR30H Motor Wrap system manifest in several critical areas. The full ball contact design provides approximately 30% higher rigidity compared to conventional linear guides, enabling improved machining accuracy and surface finishes in manufacturing applications. The preloaded ball screw assembly maintains positional accuracy throughout the system's operational lifespan, with thermal compensation features that minimize error accumulation during continuous operation. Energy efficiency is enhanced through low-friction coefficients in both the guide and drive systems, reducing power consumption while allowing higher acceleration rates. The completely enclosed design eliminates the need for external bellows or covers, simplifying machine design and reducing overall system complexity. Typical applications span multiple precision industries where reliable linear motion is paramount. In industrial machinery, the KR30H excels in CNC machining centers performing high-speed milling operations, semiconductor manufacturing equipment requiring sub-micron positioning accuracy, and automated assembly systems demanding rapid cycle times. Automotive production lines utilize these actuators for robotic welding stations, precision press fitting operations, and automated inspection systems where consistent performance under heavy loads is essential. The system's capabilities also benefit precision equipment such as medical device manufacturing machinery, optical alignment systems, and coordinate measuring machines that require vibration-free motion and exceptional straightness accuracy. The environmental protection provided by the motor wrap configuration makes these actuators particularly suitable for cleanroom environments, food processing equipment, and other applications where contamination control is critical to operational success.
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The THK LM Guide Actuator KR30H is a high-performance, compact linear motion system integrating a precision LM Guide with a ball screw-driven actuator into a single, rigid unit. This full ball type design features a recirculating ball mechanism in both the guide and drive sections, ensuring smooth, highly accurate linear motion with minimal friction and excellent positioning repeatability. Engineered for robustness, the KR30H is built to withstand substantial loads—including moment loads—while maintaining stability and precision across demanding industrial cycles. Key technical features define its operational superiority. The actuator utilizes a precision-ground ball screw with a compact, high-rigidity nut, delivering high positioning accuracy and efficient torque-to-thrust conversion. The integrated LM Guide employs a full ball recirculation system within its slide block, providing four-directional load capacity (radial, reverse-radial, and lateral moments) for exceptional stability and guiding precision. Standard components include high-grade steel for raceways and balls, optimized grease lubrication for extended service life, and optional seals to protect against contaminants. Its compact, unified housing minimizes deflection, enhances mounting rigidity, and simplifies machine design by eliminating the need to align separate guide and drive components. Performance advantages are significant across multiple metrics. The KR30H offers high stiffness and damping characteristics, which reduce vibration and settling time for faster cycle times and improved machining or positioning quality. Its low friction coefficient and high efficiency result in reduced drive motor requirements and lower energy consumption. The design ensures long-term operational reliability with minimal maintenance, even in high-duty cycles, thanks to its wear-resistant construction and effective contamination resistance. Smooth, quiet operation with high acceleration capabilities makes it suitable for dynamic applications requiring both speed and precision. Typical applications leverage these characteristics across various high-tech industries. In industrial automation, the KR30H is ideal for precision positioning stages in semiconductor manufacturing equipment, PCB drilling and routing machines, and automated assembly systems where accuracy and repeatability are paramount. Within automotive production lines, it serves in precision robotic arm joints, high-speed pick-and-place units, and automated inspection and testing machinery. For general precision equipment, it is commonly found in medical device manufacturing systems, optical positioning devices, and precision measuring instruments that demand smooth, backlash-free linear motion under load. Its robust design also suits applications in packaging machinery, material handling systems, and any automated process requiring a compact, high-load, high-precision linear actuator solution.
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The THK LM Guide Actuator KR26 Motor Wrap represents a sophisticated integration of linear motion technology and precision engineering, designed specifically for applications demanding high rigidity, exceptional accuracy, and reliable performance under rigorous operational conditions. As a full ball type linear guide actuator, the KR26 series incorporates a complete ball recirculation system within its compact housing, ensuring smooth, low-friction movement along the entire stroke length. This actuator is engineered with a motor wrap configuration, allowing for seamless coupling with servo or stepper motors to create a fully self-contained linear drive system. The unit features a robust aluminum or steel casing, precision-ground raceways, and a high-capacity ball complement that distributes loads evenly across multiple contact points. Key technical features include its advanced sealing mechanisms, which protect the internal ball recirculation system from contaminants like dust, chips, and moisture, significantly extending service life in harsh environments. The KR26 utilizes THK's proprietary crowning technology on raceway surfaces to eliminate edge stress concentration and maintain consistent preload throughout the travel range. With precision machining tolerances achieving mounting hole positional accuracy within ±0.01mm and straightness deviations under 5μm per 300mm, the actuator guarantees repeatable positioning performance. The full ball type design provides four-directional equal load capacity, allowing it to withstand moment loads from multiple axes simultaneously while maintaining stability. Performance advantages stem from its optimized structural design and material selection. The KR26 demonstrates vibration damping characteristics superior to conventional slide systems, resulting in smoother operation and reduced noise levels below 65 dB during high-speed traversal. Its dynamic load rating reaches 12.5 kN with a static load capacity of 19.6 kN, enabling substantial thrust forces while maintaining positioning accuracy within ±0.005mm. The actuator's efficiency is enhanced by its low friction coefficient of 0.002-0.003, which minimizes heat generation and power consumption during continuous operation. With maximum speeds reaching 5 m/s and acceleration capabilities up to 30 m/s², the system responds rapidly to control inputs without sacrificing precision. In industrial machinery applications, the KR26 Motor Wrap actuator excels in automated production lines where it drives precision positioning tables for CNC machining centers, performs component insertion in assembly systems, and operates as the primary motion element in semiconductor manufacturing equipment. The automotive industry utilizes these actuators in robotic welding cells for body-in-white construction, precision testing fixtures for component validation, and automated guided vehicle (AGV) systems for material handling. Within precision equipment sectors, the KR26 enables sub-micron positioning in optical inspection machines, provides stable motion for coordinate measuring arms, and serves as the core drive mechanism in advanced 3D printing systems where layer-by-layer accuracy is critical. Its corrosion-resistant variants find particular utility in cleanroom environments and medical device manufacturing where particulate contamination must be minimized.
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The THK LM Guide Actuator KR26 is a precision-engineered linear motion system that integrates a full ball-type LM guide with a compact, high-rigidity actuator mechanism. Designed for applications demanding exceptional accuracy, smooth motion, and high load capacity, this unit features a unique recirculating ball design where balls make full contact along the raceways, distributing loads evenly and minimizing elastic deformation under stress. The KR26’s construction includes a hardened steel rail and block, precision-ground to tight tolerances, ensuring consistent performance and extended service life even in harsh operational environments. Key technical features of the KR26 include its high rigidity and superior load-bearing capabilities, achieved through the full ball contact system that maximizes the contact area between the balls and raceways. This design significantly reduces friction and wear, leading to smoother motion and minimal maintenance requirements. The actuator is equipped with sealed end caps and grease fittings, providing effective protection against contaminants such as dust, chips, and moisture, which is critical for maintaining precision in dirty or demanding settings. Additionally, the KR26 offers high positioning accuracy and repeatability, with low noise and vibration levels during operation, making it suitable for high-speed applications. Performance advantages of the KR26 are evident in its ability to handle high moment loads and dynamic forces with minimal deflection, ensuring stable and precise linear movement. The full ball-type design enhances stiffness, allowing for higher acceleration and deceleration rates without sacrificing accuracy. This results in improved efficiency and productivity in automated systems. The low friction coefficient of the recirculating balls contributes to energy savings and reduced heat generation, prolonging the lifespan of both the actuator and associated machinery. Its compact form factor allows for easy integration into space-constrained designs, while the standardized mounting dimensions simplify installation and replacement processes. Typical applications for the THK LM Guide Actuator KR26 span across various industries, including industrial machinery, where it is employed in CNC machining centers, precision grinding machines, and automated assembly lines for accurate positioning and smooth traversal. In automotive systems, the KR26 is utilized in robotic welding arms, material handling equipment, and testing apparatus that require reliable, high-speed linear motion under heavy loads. Within precision equipment, it finds use in semiconductor manufacturing devices, optical alignment systems, and medical diagnostic instruments, where minimal vibration and exact movement are paramount. The KR26’s robustness and precision make it an ideal choice for enhancing the performance and reliability of advanced automation and motion control systems.
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The THK LM Guide Actuator KR20 Motor Wrap represents a high-performance linear motion solution engineered for applications demanding precision, rigidity, and reliability. This full ball type actuator integrates a compact, recirculating ball-based LM guide mechanism with a motor-driven system, delivering smooth and accurate linear travel. Designed with a focus on durability and load capacity, the KR20 features a robust housing and precision-ground rails that ensure consistent performance under substantial loads and varying operational conditions. Its construction minimizes deflection and maintains alignment, critical for maintaining accuracy in dynamic applications. Key technical features include the full ball recirculation system, which maximizes the contact area between the balls and the raceways, resulting in higher load ratings and improved stiffness compared to standard designs. The actuator is pre-loaded to eliminate backlash, enhancing positional accuracy and repeatability. It incorporates seals and wipers to protect against contaminants like dust and debris, extending service life in harsh environments. The motor wrap configuration allows for seamless integration with servo or stepper motors, facilitating precise control over speed and position. With options for various lengths and mounting configurations, the KR20 can be customized to fit specific spatial and performance requirements. Performance advantages of the KR20 LM Guide Actuator are evident in its ability to handle high loads with minimal friction, reducing energy consumption and heat generation. The low noise operation makes it suitable for environments where quiet performance is essential. Its high-speed capability, combined with exceptional accuracy, ensures efficient cycle times and improved throughput in automated systems. Maintenance is simplified due to the long-lasting lubrication and sealed design, reducing downtime and total cost of ownership. The actuator’s resilience to shock and vibration further enhances reliability in demanding industrial settings. Typical applications span across industrial machinery, where the KR20 is employed in CNC machining centers for tool positioning, automated assembly lines for precise component placement, and packaging machinery for repetitive linear motions. In automotive systems, it finds use in robotic welding arms, engine test stands, and brake assembly lines, where precision and durability are paramount. For precision equipment, the actuator is integral to semiconductor manufacturing devices, medical imaging systems, and optical alignment instruments, where sub-millimeter accuracy and smooth motion are critical. Its versatility and robust design make it a preferred choice for engineers seeking to optimize performance in linear motion applications.
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The THK LM Guide Actuator KR20 is a precision-engineered linear motion system integrating a compact LM Guide with a high-efficiency ball screw, designed for applications demanding exceptional rigidity, smooth movement, and high load capacity. This full ball type configuration ensures optimal force transmission and operational stability. The actuator features a robust KR series LM Guide block, which travels along a precision-ground shaft with a fully recirculating ball circuit. This design guarantees minimal friction, high positional accuracy, and consistent performance even under substantial loads and varying speeds. Key technical features include its compact cross-sectional design, which saves valuable space in machinery layouts. The full ball contact structure between the block and the guide rail distributes loads evenly across four directional load capacities (radial, reverse radial, and lateral), significantly enhancing moment rigidity. This construction allows the KR20 to withstand complex force scenarios without compromising precision. The integrated ball screw is precision-ground for high lead accuracy and features a large ball diameter and optimized circuit design, contributing to high torque efficiency, minimal heat generation, and extended operational life. Pre-loaded ball assemblies eliminate backlash, ensuring repeatable positioning critical for automated processes. Performance advantages are substantial, starting with its high-speed capability and acceleration stability. The low friction coefficient of the full ball recirculation system reduces energy consumption and allows for smoother, quieter operation compared to alternative slide mechanisms. Its high rigidity minimizes elastic deformation under load, maintaining accuracy during dynamic movements and when subjected to vibration or shock loads. The KR20 is engineered for durability, with high-grade steel components and effective sealing options to protect against contaminants like dust and chips, making it suitable for harsh industrial environments. Maintenance requirements are minimal due to the long-lasting lubrication and efficient wear resistance of the hardened contact surfaces. Typical applications span across industries where precision and reliability are paramount. In industrial machinery, the KR20 is commonly deployed in CNC machining centers for tool changing mechanisms, automated assembly lines for precise part positioning, and semiconductor manufacturing equipment requiring sub-micron accuracy. Within automotive systems, it serves in robotic welding arms, precision testing rigs for component validation, and automated paint shop manipulators that demand smooth, vibration-free traversal. For precision equipment, the actuator is ideal for medical device manufacturing stages, optical alignment systems in imaging devices, and coordinate measuring machines (CMM) where its high rigidity and accuracy ensure consistent measurement integrity. Its versatility also extends to packaging machinery, printing presses, and electronic component insertion systems, where its compact design and high load capacity optimize space and performance.
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The THK LM Guide Actuator KR15 Motor Wrap represents a sophisticated integration of linear motion technology and motor-driven automation, designed as a complete, ready-to-install system. This full ball type actuator combines a precision LM Guide with a ball screw and a servomotor, all encased within a protective wrap that shields critical components from contaminants. The core mechanism employs a full ball recirculation system where balls circulate smoothly along the entire length of the guide and screw, ensuring uniform load distribution and minimal friction. Key technical features include a compact, space-saving design with high rigidity, achieved through a rigid base and optimized rail geometry. The actuator is pre-loaded to eliminate backlash, providing precise positional accuracy and repeatability. It supports high-speed operation with low noise and vibration, thanks to the efficient ball recirculation and advanced sealing technology that prevents dust, chips, and moisture ingress. The integrated servomotor allows for direct, responsive control, with options for various feedback systems to enhance motion accuracy. Performance advantages of the KR15 Motor Wrap are substantial in demanding industrial environments. Its high load capacity—supporting both radial and moment loads—enables reliable operation under heavy or complex force conditions. The full ball design reduces wear and extends service life, maintaining consistent performance over long durations without frequent maintenance. Energy efficiency is another standout benefit; the low friction coefficient minimizes power consumption, while the direct drive setup reduces mechanical losses associated with traditional transmission components. This actuator excels in dynamic response, offering rapid acceleration and deceleration with minimal settling time, which is critical for high-throughput applications. Additionally, the built-in motor wrap simplifies installation and alignment, reducing setup time and potential errors during integration into machinery. Typical applications span multiple sectors where precision, reliability, and durability are paramount. In industrial machinery, the KR15 is widely used in automated assembly lines, pick-and-place systems, and CNC machining centers for precise tool positioning and material handling. Its robustness makes it ideal for automotive systems, such as in welding robots, painting arms, and engine component testing equipment, where it ensures accurate movements in harsh, high-particulate environments. For precision equipment, this actuator finds roles in semiconductor manufacturing devices, medical diagnostic instruments, and optical alignment systems, where its smooth motion and sub-millimeter accuracy support delicate operations. Overall, the THK LM Guide Actuator KR15 Motor Wrap delivers a versatile, high-performance solution that enhances productivity and precision across diverse automated applications.
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The THK LM Guide Actuator KR15 is a full ball type linear motion system that integrates a precision LM guide with a compact ball screw actuator, delivering exceptional rigidity, accuracy, and smooth motion in a single, highly efficient unit. Engineered for applications demanding high load capacity and precise positioning, the KR15 features a unique full ball circulation system within both the guide and screw mechanisms. This design ensures that a large number of load-carrying balls are constantly and smoothly recirculated, which significantly enhances load distribution, minimizes friction, and dramatically increases the system's durability and service life under demanding operational conditions. Key technical features of the KR15 include its high rigidity, achieved through a robust housing and optimized contact geometry between the balls and raceways. The full ball contact design in the guide section provides high resistance to moment loads, ensuring stable performance even when subjected to complex force vectors. The integrated ball screw, also of a full ball type, offers high positioning accuracy with minimal backlash, making it ideal for precision automation tasks. The actuator is designed for easy installation and requires minimal maintenance, as it is pre-lubricated and often available with optional seals to protect against dust and debris in harsh environments. The performance advantages of the KR15 are substantial. It delivers high-speed, high-acceleration motion with exceptional repeatability, often within microns. The efficient ball circulation system results in lower operating temperatures and reduced energy consumption compared to alternative systems. Its high load capacity allows for the direct driving of heavier payloads without the need for additional support mechanisms, simplifying machine design and reducing overall system footprint. The combination of the LM guide and ball screw in one unit eliminates alignment issues common in separately mounted systems, guaranteeing consistent precision and reducing mechanical wear over time. Typical applications for the THK LM Guide Actuator KR15 are found across industries where reliability and precision are non-negotiable. In industrial machinery, it is extensively used in CNC machining centers for tool changing mechanisms, in semiconductor manufacturing equipment for precise wafer handling and positioning, and in automated assembly lines for high-speed pick-and-place operations. Within automotive production systems, the KR15 is employed in robotic welding arms, precision parts transfer systems, and high-speed testing equipment. In the realm of precision equipment, it is a critical component in medical device manufacturing, optical positioning systems, and advanced 3D printing apparatus, where its smooth motion and pinpoint accuracy are essential for product quality and process reliability.
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