2026-07-28
NMT Ltd.
Corporate Communications Department
NMT Angular Contact Ball Bearings Precision Spindle Bearings for Machine Tools and Automated Equipment, High-Rigidity High-Speed Ball Bearings for Combined Radial and Axial Loads
Spindles of precision machine tools and industrial automation equipment sustain continuous radial cutting force and axial feeding thrust during operation, forming typical combined load conditions. Equipment sets strict requirements for rotation accuracy and operational rigidity. Tiny vibration under high speed will directly affect machining precision. Ordinary deep groove ball bearings have limited axial load capacity and cannot meet continuous bidirectional load demands of high-precision spindles. High-precision transmission mechanisms generally require adjustable bearing preload to reduce clearance and minimize runout at high speed. Relying on unique contact angle structure, angular contact ball bearings combine high-speed performance and combined load capacity, becoming preferred accessories for all kinds of precision rotating mechanisms.
To satisfy transmission requirements of high-precision spindles, Japan NMT continuously optimizes angular contact ball bearing lineup. Based on inclined contact angle structure, five core technologies are applied: high-purity precision bearing steel, graded high-precision balls, mirror superfinished raceways, low-friction solid cages and multi-set matching processes. The inclined contact design naturally supports radial and unidirectional axial loads. Multiple assembly configurations including back-to-back, face-to-face and tandem arrangement satisfy bidirectional positioning demands of various equipment. Adjustable preload strengthens shaft rigidity and reduces high-speed runout. Widely used in CNC spindles, robot joints, high-speed centrifugal equipment, precision reducers and precision rollers of automated conveyors.
Core Product Advantages
1. Excellent capacity for combined loads: Unique contact angle structure bears radial and unidirectional axial loads simultaneously, adapting to combined load conditions of precision equipment.
2. Supports various matched installation for bidirectional axial positioning: Multiple assembly combinations enable resistance to bidirectional axial forces and fulfill positioning requirements of high-precision spindles.
3. Adjustable preload improves shaft rigidity and rotation accuracy: Preload adjustment during assembly reduces rotational clearance, suppresses high-speed runout and stabilizes machining precision.
4. High-precision machining ensures controllable temperature rise at high speed: Precisely ground balls and raceways lower friction loss to avoid overheating during prolonged high-speed rotation.
5. Low operational vibration suitable for precision machining: Strict dimension sorting and geometric tolerance control deliver smooth rotation and reduce workpiece errors caused by vibration during processing.
Application Scenarios
Precision spindles of CNC machines, grinders and engraving machines; rotary joints of industrial robots and automated servo transmission mechanisms; main shafts of high-speed centrifugal devices, vacuum pumps and fluid pumps; precision gear reducers and small high-speed speed-increasing mechanisms; rotating parts of optical inspection and precision testing instruments; high-speed textile spindles and automation modules for electronic equipment.
Precision Quality Assurance
NMT angular contact ball bearings are produced according to strict precision bearing standards. Raw materials undergo purification and flaw detection. Steel balls are graded and screened. Inner and outer raceways are fully hardened and superfinished. Pre-delivery tests cover high-speed temperature rise inspection, precision measurement, matching consistency verification and fatigue endurance testing. Featuring stable precision and sufficient rigidity, the bearings serve precision equipment under high-accuracy, continuous high-speed and combined-load operating conditions for long periods.
Product Range
Single-row angular contact ball bearings; multiple standard contact angle options; stamped cages, solid resin and brass cages; matched bearing sets available; mainly open type, customized non-standard dimensions for equipment manufacturers supported.
Brand Strength
Japan NMT focuses on R&D and manufacturing of precision high-speed spindle bearings, mastering core technologies including contact angle optimization, rolling element precision control, raceway superfinishing and matched assembly processes. Products are continuously upgraded to address industry challenges of CNC machine tools and automation equipment such as high precision requirements, high-speed operation and complex loads. NMT solves common defects of ordinary precision bearings including insufficient rigidity, excessive heat generation at high speed and poor matching consistency, supplying long-lasting and stable angular contact ball bearing solutions for precision machinery manufacturers worldwide.