NMT Ltd.
Corporate Communications Department
NMT Bearings: Redefining Robotic Joint Flexibility and Rigidity with Cross Roller Technology
As industrial and collaborative robots evolve towards higher payloads and more compact structures, the performance of joint bearings directly dictates the overall motion quality. NMT cross roller bearings, specifically engineered for robotic joints, solve the pain points of traditional bearings under complex loading through innovative roller arrangement and structural design.
By utilizing a cross roller arrangement with logarithmic raceway curves, these bearings simultaneously withstand radial, axial, and overturning moment loads. This design not only doubles joint rigidity but also ensures that trajectory errors during high-frequency oscillation are strictly controlled at the micron level, significantly enhancing the precision and stability of automated production lines.
In terms of metallurgy and heat treatment, NMT demonstrates profound technical expertise. To cope with frequent bidirectional rotation and high overturning moments, NMT uses high-purity ingot-cast steel to minimize internal non-metallic inclusions. A proprietary composite heat treatment achieves an "outer-hard, inner-tough" microstructure: a high-carbon martensite surface for superior wear resistance, and a bainitic core for exceptional impact toughness.
Furthermore, NMT applies precise pre-load control and secondary ultra-fine cleaning to eliminate internal clearance. This meticulous attention to detail ensures extremely low friction torque and superior trajectory repeatability during long-term high-speed operation, making NMT cross roller bearings a trusted choice for global robot manufacturers aiming for performance breakthroughs.