As automation equipment and industrial robots develop toward miniaturization and high precision, rotary support positions must control overall installation thickness while bearing radial loads, axial loads and overturning moments simultaneously. Traditional combined structures of radial bearings and thrust bearings are cumbersome and space-consuming. Accumulated assembly tolerances easily lead to insufficient rotary precision. Ordinary slewing rings have large volumes and cannot fit lightweight compact equipment designs. Many CNC rotary tables and robot joints require low-speed high-precision indexing. Tiny clearances or insufficient rigidity directly cause positioning errors and reduced machining accuracy. Frequent start-stop motion and alternating forward-reverse rotation bring cyclic loads on contact surfaces. Poor fatigue resistance results in rapid precision loss. High-precision equipment sets strict standards for bearing geometric tolerance and smooth rotation. Ordinary bearings on the market suffer fast precision degradation after long service. The market demands thin, high-rigidity precision crossed roller bearings capable of sustaining combined loads to meet requirements of precision rotary mechanisms.

NMT Precision Crossed Roller Bearings adopt a 90-degree crossed roller arrangement. A single bearing unit withstands radial loads, axial loads and overturning moments at the same time, greatly simplifying rotary support design. The ultra-thin and compact structure saves axial installation space and supports lightweight integrated design for robot joints and small rotary tables. Ultra-precisely ground rollers feature excellent dimensional consistency for even load distribution, outstanding rigidity and minimal deformation under loads to maintain stable rotary positioning accuracy over time. Precisely ground and strengthened raceways deliver superior wear resistance for alternating working conditions such as frequent forward-reverse rotation and intermittent indexing. Standard seals prevent dust and cutting fluid from entering raceways, suitable for machine tool workshops and automatic production lines. Adjustable clearance and preloaded versions are optional to eliminate rotary clearance and restrain vibration. Comprehensive standard dimensions enable convenient installation and direct replacement of old rotary supports to reduce renovation difficulty. Widely used in all kinds of precision rotary mechanisms, the bearings deliver reliable rotary support solutions for high-precision intelligent equipment.

Core Product Advantages

Crossed roller layout enables one bearing to bear combined radial, axial and overturning loads without multiple bearing assemblies;

Ultra-thin compact shape greatly reduces axial installation space, ideal for lightweight integrated design of robots and small rotary tables;

Ultra-precise rollers and raceways ensure high overall rigidity and tiny deformation to sustain stable rotary precision for long-term operation;

Optional preloaded structure eliminates rotary clearance and suppresses vibration during low-speed rotation to improve indexing accuracy;

Matching dust-proof seals resist dust and cutting fluid corrosion and extend bearing service life;

Abundant specifications support multiple installation types for convenient replacement on precision automation equipment.

Typical Application Scenarios

Industrial robot joints and rotary bases; rotary tables and indexing plates of CNC machining centers; precision rotary platforms for optical inspection equipment; indexing mechanisms of semiconductor automation devices; turnover and rotary fixtures of non-standard automation; rotary stations of laser processing equipment; precision rotary assemblies for medical devices; rotary supports for PTZ cameras and intelligent equipment.

Quality Assurance

NMT Precision Crossed Roller Bearings are manufactured according to standards for high-precision rotary bearings. Raw materials pass mechanical and metallographic inspection. Raceways and rolling elements receive ultra-precision grinding. All finished bearings pass rotary precision inspection, rigidity testing and alternating load endurance testing to guarantee long-term high-precision stable operation of precision equipment. Complete specifications continuously supply high-precision rotary support solutions for manufacturers of industrial robots, CNC machine tools and precision automation equipment.

Product Range

Adjustable clearance type and preloaded crossed roller bearings in various sizes available. Professional selection guidance based on precision requirements, load conditions, rotating speed and working environment is provided.

Brand Strength

NMT focuses on R&D and manufacturing of high-precision bearings. Addressing industry challenges including miniaturized intelligent equipment, combined load requirements of rotary mechanisms and easy precision attenuation during long-term operation, NMT continuously optimizes raceway machining and roller precision control technology, supplying high-rigidity and long-stable crossed roller bearing solutions for all precision rotary equipment.