The ball screw feed system of CNC and precision processing equipment determines overall machining accuracy. Bearings installed at both ends of the screw sustain continuous bidirectional axial loads and alternating radial loads generated by high-frequency reciprocating motion. Ordinary single-direction angular contact bearings require complicated pairing and suffer inconsistent preload. Long-term high-speed operation easily causes preload attenuation and increased axial clearance, resulting in feed jitter, positioning deviation and dimensional errors. Conventional precision bearings generate excessive heat at high speeds, and thermal deformation destroys screw straightness and reduces machining precision.

Machine tool screw working conditions feature frequent start-stop cycles, high-speed feeding and continuous micro-vibration. Ordinary cages lack rigidity and are prone to wear, abnormal noise and rolling element jamming. Commercially available standard bearings cannot meet micron-level repeat positioning requirements. Precision degradation occurs after short service time, requiring frequent calibration and maintenance and reducing production efficiency. Traditional bearings also produce loud noise and high temperature rise, failing to support long-term stable operation of high-end precision machine tools. The industry demands professional ball screw bearings with high rigidity, low temperature rise, low noise and stable bidirectional load capacity.

NMT Ball Screw Bearings adopt a large contact angle bidirectional thrust structure with ultra-high axial rigidity and strong deformation resistance. They effectively suppress micro-jitter during high-speed feeding and maintain precise axial positioning. Nano-level ultra-precision grinding ensures uniform raceway curvature and consistent ball tracks, reducing friction and temperature rise to eliminate thermal accuracy drift.

High-strength engineered plastic cages feature light weight, high toughness and excellent high-speed friction resistance. They isolate steel balls to eliminate collision noise and ensure quiet and stable transmission. Factory pre-set precise preload eliminates manual pairing errors and ensures consistent accuracy. Deep cryogenic stabilization treatment releases internal stress to prevent long-term precision attenuation, delivering outstanding fatigue and creep resistance for 24-hour continuous machining.

Optimized sealing structures block dust and fine chips to protect precision raceways and extend service life. Standard mounting dimensions are fully interchangeable with mainstream specifications, enabling easy replacement without housing modification for new and old precision machine tools.

Core Product Advantages

Bidirectional thrust angular contact structure supports double axial loads with single bearing unit, simplifying installation and stabilizing preload;

Large contact angle and high rigidity resist axial deformation and eliminate feed jitter for ultra-precise positioning;

Ultra-precision ground raceways reduce friction and temperature rise to avoid thermal machining errors;

Professional plastic cages ensure quiet high-speed operation, wear resistance and anti-jamming performance;

Cryogenic stabilization guarantees permanent dimensional accuracy without long-term precision loss;

Optimized dust-proof structure adapts to dusty dry high-speed working conditions in machine tool workshops.

Typical Application Scenarios

XYZ-axis ball screw supports for vertical and horizontal machining centers; precision feed screws of CNC milling and grinding machines; transmission support structures of high-speed tapping and drilling machines; screw supports of gantry machines and engraving mills; servo slide table screw systems for automatic precision transfer equipment; precision transmission mechanisms of optical inspection devices; feed support positions of high-end CNC precision equipment.

Quality Assurance

NMT Ball Screw Precision Bearings are manufactured strictly in accordance with P4/P5 high-precision machine tool standards. High-purity raw materials ensure uniform metallographic structure. Ultra-precision grinding is applied to raceways and steel balls with strict tolerance control. All finished bearings pass high-speed temperature rise testing, noise inspection, preload stability testing and high-frequency reciprocating endurance testing to guarantee long-term high-precision low-fault operation of precision machine tools. Comprehensive specifications continuously supply high-end precision bearing solutions for intelligent automation equipment manufacturers.

Product Range

Multiple sizes and P4/P5 precision grades available. Professional selection guidance based on operating speed, preload requirements, feed load and working environment is provided.

Brand Strength

NMT specializes in high-precision machine tool transmission bearings. Solving industry pain points including high temperature rise, positioning jitter, preload attenuation and precision loss, NMT continuously optimizes raceway processing, preload parameters and cage structures, providing long-term stable ball screw bearing solutions for high-end intelligent precision manufacturing equipment.