NR-LA SERIES

The THK LM Guide NR X NR LA SERIES represents a significant advancement in linear motion technology, specifically engineered to handle ultra-heavy loads with exceptional precision and reliability. As a full ball type radial LM guide, this series incorporates a unique design where the ball grooves are arranged in a radial configuration, allowing for the accommodation of substantial loads from all directions—radial, reverse radial, and lateral. This design is particularly beneficial in applications where high rigidity and load capacity are paramount, ensuring stable and accurate motion even under the most demanding conditions.

Key technical features of the NR X NR LA SERIES include its full ball contact structure, which maximizes the number of load-bearing balls in the raceway. This configuration enhances load distribution and minimizes elastic deformation, leading to improved stiffness and longevity. The guide rails and blocks are manufactured from high-carbon chromium bearing steel, subjected to rigorous heat treatment processes to achieve superior hardness and wear resistance. Additionally, the series boasts an optimized sealing system with multiple seals and scrapers that effectively prevent contaminants such as dust, chips, and moisture from entering the ball circuits, thereby maintaining smooth operation and extending service life in harsh environments. Pre-loaded ball assemblies are standard, eliminating backlash and ensuring high positional accuracy, which is critical for precision applications.

Performance advantages of this series are evident in its ability to support ultra-heavy loads while maintaining low friction and high-speed capabilities. The radial type design allows for a compact form factor without compromising on load capacity, making it an ideal solution for space-constrained installations. Its high rigidity reduces vibration and deflection, contributing to enhanced machining accuracy and surface finish in industrial settings. Moreover, the low noise and maintenance requirements of the NR X NR LA SERIES translate to reduced downtime and operational costs, boosting overall productivity.

Typical applications span a wide range of industries, including heavy-duty industrial machinery such as CNC machining centers, where it facilitates precise table movements under significant cutting forces. In automotive systems, it is employed in robotic welding arms, assembly lines, and press machines that demand robust load handling and repeatability. For precision equipment, this series finds use in semiconductor manufacturing devices, optical positioning stages, and medical imaging systems, where its accuracy and reliability ensure consistent performance. By integrating the THK LM Guide NR X NR LA SERIES, engineers can achieve superior motion control, durability, and efficiency in their most challenging applications.

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Model No. Outer dimensions Basic load rating
Radial
Height
M
Width
W
Length
L
Dynamic
rating
C
Static
rating
C0
mm mm mm kN kN
NR 75LA LM Guide
83
195
274
355
800
NR 85LA LM Guide
90
215
302.8
435
972
NR 100LA LM Guide
105
260
326.2
599
1300