Self-aligning Model NSR-TBC SERIES

The THK LM Guide NSR TBC SERIES represents a significant advancement in linear motion technology, featuring a full ball type design with integrated self-aligning capabilities. This construction ensures optimal contact between the balls and raceways, distributing loads evenly across all rolling elements. The self-aligning function automatically compensates for mounting inaccuracies or base surface irregularities, maintaining smooth motion characteristics without requiring precision machining of mounting surfaces. Manufactured with THK’s proprietary materials and heat treatment processes, these guides achieve exceptional hardness and wear resistance while maintaining dimensional stability under varying operational conditions.

Key technical features include a reinforced steel shell structure that provides increased rigidity and load capacity compared to conventional designs. The precision-ground raceways feature optimized groove geometry that minimizes friction while maximizing contact area. Specialized sealing systems with multiple labyrinth and contact seals effectively exclude contaminants while retaining lubrication, making these guides suitable for harsh environments. The recirculation system employs THK’s advanced ball circuit design that ensures consistent recirculation without ball-to-ball contact, significantly reducing noise and vibration during operation. Pre-loaded options are available for applications requiring minimal deflection and high positional accuracy.

Performance advantages manifest in several critical areas. The NSR TBC SERIES demonstrates up to 30% higher load capacity than previous generations while maintaining compact dimensions. The self-aligning capability reduces installation time and costs by accommodating alignment errors up to ±0.5 degrees without performance degradation. Low friction coefficients enable higher speeds and accelerations while reducing energy consumption. The optimized ball recirculation system extends service life by eliminating stress concentrations and maintaining consistent lubrication distribution. These guides maintain precision even under complex loading conditions, with running parallelism accuracy within 5μm per 300mm of travel.

In industrial machinery applications, the NSR TBC SERIES finds extensive use in CNC machining centers, where it provides stable guidance for spindle heads and tool changers operating under heavy cutting forces. The self-aligning feature proves particularly valuable in large-scale gantry systems where mounting surface imperfections are common. Automotive manufacturing systems employ these guides in welding robots, transfer lines, and assembly automation equipment where reliability and precision are paramount. The contamination resistance makes them suitable for painting and coating applications where particulate exposure is inevitable.

Precision equipment applications include semiconductor manufacturing apparatus, where the guides facilitate nanometer-level positioning in wafer handling and lithography systems. Medical device manufacturing utilizes these components in automated assembly machines requiring cleanroom compatibility and vibration-free operation. The series’ thermal stability ensures consistent performance in laboratory automation equipment subjected to temperature variations. Packaging machinery benefits from the high-speed capabilities and durability in repetitive pick-and-place operations. Measurement and inspection systems leverage the guides’ accuracy for coordinate measuring machines and optical comparators, where minimal friction-induced errors are critical for measurement integrity.

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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
NSR 20TBC LM Guide
40
70
67
9.41
18.6
NSR 25TBC LM Guide
50
90
78
14.9
26.7
NSR 30TBC LM Guide
60
100
90
22.5
38.3
NSR 40TBC LM Guide
75
120
110
37.1
62.2
NSR 50TBC LM Guide
82
140
123
55.1
87.4
NSR 70TBC LM Guide
105
175
150
90.8
152