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SKR65

The THK LM Guide Actuator Caged Ball LM Guide Actuator SKR65 represents a sophisticated integration of linear motion technology, combining a precision LM guide with a high-efficiency ball screw actuator in a single, compact unit. This design eliminates the need for separate mounting of guide and drive components, streamlining machine design, reducing assembly time, and enhancing overall structural rigidity. The defining feature of this actuator is its use of a caged ball technology within the LM guide block. Instead of balls recirculating in direct contact with each other, they are individually contained within a precision polymer cage. This fundamental design innovation drastically reduces friction and heat generation, virtually eliminating metal-on-metal contact between the balls. The result is a remarkably smooth, quiet, and consistent motion with exceptionally low and stable running torque, even at high speeds.

Key technical features of the SKR65 include its robust construction, with a shaft diameter of 65mm, making it suitable for applications demanding high load capacity and moment resistance. The integrated ball screw provides high positioning accuracy and repeatability, while the caged ball LM guide ensures long-term precision by preventing ball-to-ball wear and the associated degradation of smoothness. The seal design is optimized to effectively exclude contaminants like dust and chips, a critical factor for maintaining performance in harsh industrial environments. The unit is pre-lubricated for long service life and requires minimal maintenance.

The performance advantages are substantial. The reduction in friction directly translates to lower energy consumption and less heat buildup, which is crucial for precision equipment where thermal expansion can cause dimensional inaccuracies. The stability of the running torque ensures consistent performance throughout the actuator’s stroke, leading to improved machining or assembly quality. The inherent quiet operation enhances the working environment and is beneficial for automated systems in noise-sensitive areas. Furthermore, the extended service life and reduced maintenance requirements significantly lower the total cost of ownership.

Typical applications for the THK SKR65 actuator are found in demanding sectors where precision, reliability, and high dynamic performance are non-negotiable. In industrial machinery, it is ideally suited for high-speed machining centers, automated assembly robots, precision grinding machines, and high-speed pick-and-place systems. Within the automotive industry, it is deployed in high-precision welding equipment, advanced robotic painting arms, and automated inspection stations on production lines. In the realm of precision equipment, the SKR65 is a critical component in semiconductor manufacturing apparatus, such as wafer steppers and die bonders, as well as in precision measuring instruments and medical automation devices where smooth, vibration-free motion is essential for accuracy. Its robust design and high load capacity also make it suitable for material handling systems and other applications requiring precise linear positioning under significant loads.

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Long nut Block A-B with Cover SERIES
The THK LM Guide Actuator Caged Ball LM Guide Actuator SKR65 Long Nut Block A B with Cover SERIES represents a sophisticated evolution in linear motion technology, engineered for applications demanding exceptional precision, rigidity, and longevity. This system integrates a recirculating ball screw mechanism with a robust LM guide, where the balls are uniquely contained within a cage structure. This caged ball design is a pivotal technical feature, fundamentally reducing friction, minimizing heat generation, and preventing ball-to-ball contact, which drastically cuts operational noise and enhances the system's service life. The SKR65 designation specifies a model with a 65mm nominal width, indicating its capacity for handling substantial loads and moments. Key performance advantages stem directly from its construction. The incorporation of the long nut block—available in Type A and Type B configurations—significantly increases the number of load-carrying balls in contact with the screw shaft. This design choice dramatically improves axial rigidity, positioning accuracy, and load capacity compared to standard nut designs. The included cover is a critical component for reliability, effectively sealing the ball screw and LM guideway from pervasive environmental contaminants such as dust, chips, and moisture. This robust sealing ensures consistent performance and prevents premature wear in harsh operating conditions. The system is pre-loaded for high stiffness, resulting in minimal axial clearance and exceptional repeatability, which is crucial for precision positioning tasks. Its high-efficiency ball screw mechanism also allows for high-speed movement without sacrificing accuracy or generating excessive heat. Typical applications for this actuator series are found in high-performance industrial sectors. In industrial machinery, it is indispensable for the precise axis movement in CNC machining centers, high-speed pick-and-place robots, and automated assembly lines where speed, precision, and uptime are paramount. Within automotive manufacturing systems, these actuators provide the reliable motion control needed for precision welding robots, automated material handling systems, and rigorous testing equipment. For precision equipment, the SKR65 series is ideally suited for applications such as semiconductor manufacturing apparatus, precision optical alignment systems, and advanced medical diagnostic equipment, where micron-level accuracy, smooth motion, and long-term reliability are non-negotiable requirements. This combination of advanced caged ball technology, enhanced load capacity through the long nut, and integrated protection makes the THK SKR65 series a cornerstone component for advancing automation and precision in modern manufacturing and technology development.
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Long nut Block A-B SERIES
THK's LM Guide Actuator Caged Ball LM Guide Actuator SKR65, paired with the Long Nut Block A and B SERIES, represents a pinnacle of precision linear motion engineering, designed to deliver exceptional rigidity, accuracy, and longevity in demanding industrial applications. This system integrates a recirculating ball-based linear guide mechanism with an actuator-driven design, where the SKR65 model denotes a specific size and load capacity optimized for heavy-duty operations. The caged ball technology ensures that rolling elements are uniformly spaced and retained within a dedicated cage, minimizing friction, reducing heat generation, and preventing ball-to-ball contact, which significantly enhances operational smoothness and extends service life. The Long Nut Block variants (A and B SERIES) provide extended nut lengths for increased load distribution and higher moment resistance, making them ideal for applications requiring sustained precision under substantial forces. Key technical features include a robust steel construction with precision-ground raceways for consistent ball recirculation, ensuring minimal deviation and high repeatability. The actuator component enables controlled linear movement with integrated drive mechanisms, often compatible with servo or stepper motors for precise positioning. Advanced sealing systems protect against contaminants like dust, chips, and moisture, maintaining performance in harsh environments. Pre-load adjustment capabilities allow for fine-tuning to eliminate backlash and enhance stiffness, while the compact design of the SKR65 facilitates space-saving integration into machinery layouts. Performance advantages are substantial, with the system offering high load capacities—supporting radial, reverse radial, and moment loads—coupled with low noise and vibration levels. This results in improved efficiency, reduced maintenance intervals, and energy savings due to optimized friction characteristics. The caged ball design also contributes to higher speeds and accelerations without compromising accuracy, achieving positioning precision within micrometers. Typical applications span across industrial machinery, where these components are employed in CNC machining centers for tool positioning, automated assembly lines for precise part handling, and semiconductor manufacturing equipment requiring sub-micron accuracy. In automotive systems, they are utilized in robotic welding arms, engine component testing rigs, and automated paint systems, where durability and repeatability are critical. Precision equipment sectors, such as medical device manufacturing or optical alignment systems, benefit from the actuator's smooth motion and minimal particulate generation, ensuring cleanroom compatibility. Overall, the THK LM Guide Actuator SKR65 with Long Nut Block A/B SERIES provides a reliable, high-performance solution for applications demanding rigorous linear motion control, contributing to enhanced productivity and reduced downtime in advanced automation environments.
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