Joints of industrial robots, CNC rotary tables and precision testing instruments have strict space constraints, and equipment design trends toward lightweight and miniaturization. Multiple sets of ordinary bearings are required to withstand radial loads, axial loads and overturning moments simultaneously, which leads to large occupied space, complicated assembly and difficult coaxiality control, easily resulting in positioning deviation. Precision machining and automatic testing equipment demand high repeated positioning accuracy and tiny rotary clearance. Stagnant rotation or excessive clearance directly causes defective workpieces and distorted test data. Plenty of automatic equipment runs reciprocally for a long time, and insufficient bearing rigidity triggers vibration and undermines operational stability. Conventional large slewing rings feature excessive thickness and cannot adapt to slim equipment layout. The market demands compact crossed roller bearings with multi-direction load capacity, high positioning accuracy and high rigidity.

NMT Crossed Roller Bearings feature orthogonally crossed rollers. A single bearing can sustain radial loads, axial loads and overturning moments, simplifying mechanical structures, reducing part quantity and lowering assembly difficulty. Integral or split inner and outer rings are optional. Thin-wall structure meets lightweight and miniaturized design targets. Ultra-precisely ground rolling elements together with finely machined raceways support slight clearance or preload configuration to minimize rotary clearance and guarantee high repeated positioning accuracy. Raceway surfaces are strengthened for outstanding wear resistance and stable dimension during long-term reciprocating rotation. Various mounting hole layouts are available for direct connection with flanges and rotary plates without complicated auxiliary supports. Uniform friction ensures smooth low-speed rotation without stagnation for precision indexing and slow continuous rotary applications. A complete series of standard specifications facilitates selection for automation manufacturers.

Clearance adjustable and preloaded structures are available. Selection can be made based on positioning accuracy, load magnitude, rotating speed and mounting form for all types of precision automatic rotary devices.

Core Product Advantages

Rollers arranged at 90°, single bearing bears radial, axial and overturning loads and simplifies transmission structures;

Unique thin compact design achieves smaller thickness under identical load levels for lightweight miniaturized equipment;

Ultra-precisely ground raceways and rollers support slight clearance/preload setup, high repeated positioning accuracy and low rotary error;

Excellent rigidity reduces operational vibration and maintains stable positioning during long-term reciprocating rotation;

Diverse mounting specifications enable direct matching with rotary table and robot joint flanges for easy assembly;

Smooth low-speed rotation without stagnation, ideal for precision indexers, testing equipment and CNC automation.

Typical Application Scenarios

Joints of 6-axis industrial robots and rotary parts of collaborative robots; CNC rotary tables and 5-axis index plates for machining centers; rotary mechanisms of optical inspection and vision measuring instruments; automatic indexing fixtures and precision rotary conveying platforms; rotary support assemblies of medical CT and diagnostic imaging equipment; precision rotary modules for semiconductor handling.

Quality Assurance

NMT Crossed Roller Bearings are manufactured under full-process control complying with precision rotary bearing standards. Metallographic inspection is implemented for raw materials, and raceways and rollers receive ultra-precision grinding. All finished bearings pass rotary clearance inspection, positioning accuracy testing, rigidity load testing and continuous reciprocating endurance testing to guarantee stable long-term operation of high-precision equipment. Comprehensive specifications support continuous supply of precision rotary components for automation, CNC and precision instrument manufacturers.

Product Range

Clearance adjustable and preloaded crossed roller bearings are available. Professional selection guidance based on positioning accuracy requirements, load conditions, rotating speed and mounting structures is provided.

Brand Strength

NMT focuses on R&D and manufacturing of precision bearings for automation. Solving industry challenges including miniaturization demand, high positioning accuracy, multi-direction composite loads and limited installation space for industrial robots, CNC rotary tables and precision testing instruments, NMT continuously optimizes raceway machining and rolling element precision control technology, supplying high-rigidity, high-precision and compact crossed roller bearing solutions for high-end precision rotary equipment.