Joints of industrial robots, CNC indexing tables, automated rotary worktables and optical testing devices bear radial loads, axial loads and overturning moments simultaneously during operation. Traditional combined bearing schemes feature complicated structures and occupy large installation space. Multiple bearing combinations easily cause cumulative assembly errors and reduce equipment positioning accuracy. Conventional large slewing bearings are bulky and fail to meet the miniaturization and lightweight trend of automated equipment. High-end automated equipment sets strict standards for rotary positioning accuracy, rotary rigidity and repeat positioning performance. Excessive clearance leads to rotary shaking and directly lowers processing and testing precision. With continuous upgrading of intelligent manufacturing equipment, internal space becomes increasingly compact. Designers need precision bearings that withstand complex loads with a single unit to simplify transmission structures, reduce overall equipment volume and maintain stable rotary accuracy for long-term operation.

NMT Precision Cross Roller Bearings adopt a structure with rollers arranged perpendicularly in a crossed layout. A single bearing can bear radial loads, axial loads and overturning moments at the same time, greatly simplifying bearing layout and saving internal installation space. Precisely sorted rolling elements and ultra-precision ground raceways enable controllable rotary clearance, ultra-high rotary accuracy and rigidity, effectively suppressing shaking and offset during rotation and ensuring stable repeat positioning accuracy. A cage separates rollers to avoid mutual friction and collision, reduce operating noise and slow rolling element wear. Multiple structural specifications including adjustable clearance type and preloaded type are available to match different accuracy requirements of precision processing equipment and testing instruments. Compact and thin overall dimensions meet the lightweight and miniaturization design trend of automated equipment. Complete standard outline dimensions facilitate integrated assembly of various rotary modules. The bearings adapt to low-speed high-precision continuous rotation and intermittent indexing positioning and are widely adopted in rotary units of high-end intelligent equipment.

The product range includes standard cross roller bearings, preloaded cross roller bearings and adjustable clearance cross roller bearings. Widely applied in rotary joints of six-axis industrial robots, CNC indexing worktables, optical inspection rotary platforms, machine tool 4th axes, automated welding rotary tooling and semiconductor precision transfer equipment. Standard industrial dimensions support modular integrated design.

Core Product Advantages

Cross arranged rollers enable a single bearing to bear combined radial, axial and overturning loads, simplify transmission structure and save equipment installation space;

Ultra-precision ground raceways matched with precision rolling elements realize controllable rotary clearance, high rigidity and positioning accuracy to restrain rotary shaking effectively;

Isolation cage prevents direct contact friction between rollers, reduces operating abrasion and noise and extends bearing service life;

Multiple versions including standard clearance, adjustable clearance and preloaded types support flexible selection according to accuracy requirements, suitable for general automation equipment and high-end precision instruments;

Compact and thin structure satisfies miniaturization and lightweight design and supports overall structural optimization of machinery;

Complete standard outline dimensions fit modular design, facilitate standardized integration of rotary mechanisms and lower mechanical design difficulty.

Typical Application Scenarios

Base and arm rotary joints of multi-axis industrial robots; indexing tables and 4th axis rotary mechanisms of CNC machining centers; optical visual inspection rotary platforms; automated rotary tooling for welding and grinding; precision rotary modules for semiconductor chip transfer; automatic rotary units of medical equipment.

Quality Assurance

NMT Precision Cross Roller Bearings implement full-process closed-loop quality control. Special alloy bearing steel raw materials are inspected batch by batch. Multiple inspection nodes cover ultra-precision raceway grinding, graded rolling element screening, stabilization heat treatment and assembly debugging. Finished products pass rotary accuracy tests, rigidity load tests and rotation smoothness inspection. Products with excessive accuracy deviation, unsmooth rotation or insufficient rigidity are strictly rejected. Reliable high-precision rotary support solutions are steadily supplied to manufacturers of intelligent automation and CNC precision equipment.

Product Range

Standard clearance cross roller bearings, adjustable clearance cross roller bearings, preloaded precision cross roller bearings. Professional selection guidance is provided according to load capacity, accuracy grade, rotary speed and rigidity requirements.

Brand Strength

NMT focuses on R&D and manufacturing of precision cross roller bearings. Targeting core demands of intelligent robots, CNC equipment and optical testing equipment including combined load capacity, high rotary accuracy and limited installation space, NMT continuously optimizes raceway processing technology, rolling element screening standards and assembly preloading processes to improve rotary rigidity, positioning accuracy and long-term operational stability. Equipment designers are supported to simplify rotary mechanism structures, reduce overall machine size, guarantee long-term high-precision stable operation of intelligent equipment and cut later debugging and maintenance costs of high-end automated machinery.