In the feed transmission systems of high-end CNC machine tools and precision automation equipment, precision ball screw support bearings play a core hub role in converting rotational motion into high-precision linear motion. As modern manufacturing rapidly evolves towards high speed and high precision, machine tool feed systems have extremely stringent requirements for the axial rigidity, rotational accuracy, and thermal stability of ball screws. Traditional bearings, during high-speed operation, are highly susceptible to thermal elongation of the ball screw caused by internal frictional heat, leading to out-of-tolerance positioning accuracy. Meanwhile, when subjected to axial impact loads with high-frequency direction changes, traditional structures are prone to micro-elastic yielding, causing ripples on the machined surface. Machine tool manufacturers urgently need support bearings customized for precision ball screws, featuring ultimate high axial rigidity and ultra-low friction characteristics.

Facing the stringent requirements of precision feed for "zero backlash" and "micron-level positioning," support systems must not only possess extremely high axial load-bearing capacity but also achieve ultimate thermal management and smoothness during high-speed continuous operation. Due to poor internal clearance control and contact angle design limitations, traditional bearings are prone to internal sliding friction when subjected to huge axial thrust, leading to excessive temperature rise and cage fatigue. The market urgently demands a support bearing solution that can break through the dual bottlenecks of high rigidity and low heat generation, achieving ultimate precision for ball screw systems, providing solid protection for various high-end CNC machine tools.

NMT Precision Ball Screw Support Bearings are born to conquer the extreme transmission challenges of machine tool feed systems. This series achieves disruptive breakthroughs in structure by adopting a 60° ultra-large contact angle design and full-complement or high-precision preloading structures, enabling them to withstand extreme unidirectional or bidirectional axial loads and significantly enhancing the overall axial rigidity of the feed system. In terms of low friction and thermal management, NMT greatly reduces the friction resistance between rolling elements and raceways through optimized internal geometric profiles and nano-level ultra-precision grinding raceway processes. Combined with NMT's proprietary long-lasting low-resistance grease, it effectively suppresses temperature rise during high-speed operation, ensuring that the ball screw maintains ultra-low thermal deformation and excellent rotational accuracy even at extreme speeds.

In precision manufacturing and quality control, NMT enforces micrometer-level stringent standards for every component of its precision ball screw support bearings. Rings and raceways undergo nano-level ultra-precision grinding to ensure ultimate surface finish and geometric accuracy. All components undergo precision matching and assembly in a constant-temperature dust-free workshop. Finished products undergo 100% starting friction torque, rigidity testing, and rotational accuracy testing, eliminating any products with minute defects, ensuring the ultimate performance of batch products under extreme conditions such as precision ball screws.

With rich specifications, these bearings are widely used in CNC machine tool ball screws, precision linear guideway systems, semiconductor manufacturing equipment feed modules, precision measuring instruments, and industrial robot linear drive shafts, satisfying the supporting needs of various high-axial-rigidity, low-friction, high-precision, and long-life transmission nodes.

Core Product Advantages

60° ultra-large contact angle and high-precision preloading structural design allow a single bearing to withstand extreme axial loads, significantly enhancing the overall axial rigidity of the ball screw feed system;

Optimized internal geometric profiles and nano-level ultra-precision grinding raceway processes greatly reduce rolling friction resistance, achieving ultra-low starting friction torque and operating energy consumption;

Proprietary long-lasting low-resistance grease and high-reliability sealing structures effectively suppress temperature rise during high-speed operation, ensuring ultra-low thermal deformation of the ball screw at extreme speeds;

Ultimate compact and lightweight design significantly reduces the volume of the ball screw support end while meeting high axial load-bearing and high-rigidity requirements, enhancing feed dynamic response speed;

100% micrometer-level precision matching and constant-temperature assembly ensure perfect load distribution inside each bearing, eliminating micro-elastic yielding and backlash;

Excellent anti-fatigue and anti-impact characteristics easily handle huge axial impact loads caused by high-frequency direction changes and rapid stopping/turning of machine tools, preventing cage fracture;

Full life-cycle high-reliability design significantly reduces the failure rate and downtime maintenance frequency of machine tool feed systems, ensuring efficient and continuous operation of automated production lines;

Ultimate rotational smoothness effectively avoids ripples on machined surfaces caused by mechanical vibrations, ensuring surface finish and dimensional accuracy of precision components.

Typical Application Scenarios

CNC machine tool ball screws and precision linear guideways; Semiconductor manufacturing equipment feed modules; Precision measuring instruments and coordinate measuring machines; Industrial robot linear drive shafts; Precision gear and thread processing machine tools; Core transmission hubs of high-end automation equipment.

Precision Quality Assurance

NMT Precision Ball Screw Support Bearings use high-purity bearing steel and high-strength alloy materials as core raw materials, subject to strict material purity and non-destructive testing upon incoming. After precision turning, rings undergo special heat treatment and nano-level ultra-precision grinding, with strict control over raceway surface roughness and micro-geometric accuracy. Precision rolling elements are fully automatically sorted for size, roundness, and weight to ensure consistent load distribution and friction torque within the same bearing set. All components undergo precision matching and assembly in a constant-temperature dust-free workshop. Finished products undergo 100% starting friction torque, rigidity testing, and rotational accuracy testing. Unqualified products are completely rejected, ensuring the ultimate performance of batch products under extreme conditions such as precision ball screws, providing reliable support solutions for high-end precision equipment.

Product Series

Precision ball screw support angular contact ball bearings, precision ball screw support bidirectional thrust angular contact ball bearings, precision ball screw support crossed roller bearings; Selection is based on installation space, axial rigidity requirements, friction coefficients, and precision levels.

Brand Strength

NMT is deeply engaged in the R&D and manufacturing of precision ball screw support bearings. Targeting industry pain points in machine tool feed scenarios—where high-speed operation leads to thermal elongation and out-of-tolerance positioning accuracy, high-frequency direction changes trigger elastic yielding and surface ripples, and traditional bearing volumes are too large, restricting dynamic response—NMT continuously optimizes 60° ultra-large contact angle structures, nano-level ultra-precision grinding processes, and long-lasting low-resistance lubrication technology. This effectively solves fatal defects of traditional bearings in ball screw support such as easy heating, easy wear, and insufficient rigidity. It significantly enhances the machining accuracy and production efficiency of CNC machine tools, helping high-end machine tool manufacturing enterprises break through precision transmission bottlenecks and seize the global high-end precision machine tool intelligent manufacturing market.