Joints of industrial robots, rotary tables of CNC machining centers, precision indexing plates and automated rotary inspection platforms need to bear radial loads, axial loads and overturning moments simultaneously during operation. Limited installation space puts strict restrictions on bearing dimensions. Traditional combined bearing solutions require multiple bearing sets, resulting in complicated assembly, larger occupied space and unstable rotary precision under combined loads. Conventional bearings lack sufficient rigidity. Overturning moments create rotary clearance, reducing positioning accuracy and impairing machining quality and repetitive positioning performance.

Precision automation equipment requires long-term continuous high-precision operation. Frequent start-stop and reciprocating rotation continuously test bearing rigidity and dimensional stability. Dust and cutting fluid easily penetrate into bearings, causing roller abrasion and precision degradation. Many ordinary slewing bearings feature poor clearance control. Clearance expands rapidly after short operation and demands frequent calibration, lowering production efficiency. Automation equipment manufacturers require compact crossed roller bearings with high rigidity, capability to withstand combined loads and stable long-term rotary precision to guarantee accurate operation of rotary mechanisms within limited installation space.

NMT Crossed Roller Bearings adopt cylindrical rollers arranged at 90 degrees. A single bearing unit supports radial loads, bidirectional axial loads and overturning moments at the same time, greatly simplifying mechanical structures and saving installation space. Raceways and rollers are super-precisely ground with accurately controlled clearance to deliver uniform rotary resistance, ultrahigh rigidity and outstanding positioning accuracy. The highly integrated inner and outer ring design enables direct mounting without extra supporting components. Various sealing options block dust and cutting fluid from invading raceways, slow down abrasion and maintain precise rotary performance for extended periods. Preload configurations are optional to meet zero-clearance rotary requirements of ultra-precision equipment.

A full range of specifications is available, including non-toothed, internally toothed and externally toothed structures to match different driving modes. Widely applied in articulated industrial robot joints, CNC rotary tables, precision indexing devices, optical inspection rotary platforms, five-axis machining centers and rotary modules of semiconductor automation equipment. Unified machining benchmarks guarantee good interchangeability for convenient disassembly during equipment upgrading.

Core Product Advantages

Rollers arranged at 90 degrees. Single bearing withstands radial, axial loads and overturning moments, simplifying structure and saving installation space;

Super-precisely ground raceways and rollers with controllable clearance deliver high rotary rigidity and excellent repetitive positioning accuracy;

Integrated inner and outer rings enable easy installation without complex auxiliary positioning parts and shorten assembly time;

Optional multi-sealing assemblies resist dust and cutting fluid, suitable for machine tool workshops and automated production environments;

Multiple configurations including standard clearance, light preload and full preload satisfy demands from general automation to ultra-precision machinery;

Non-tooth, internal-tooth and external-tooth versions are available with wide compatibility for robots, CNC equipment and optical instruments.

Typical Application Scenarios

Rotary joints of multi-joint industrial robots; CNC rotary tables for five-axis machining centers; precision indexing and angle positioning devices; rotary platforms for optical inspection equipment; rotary transmission modules for semiconductor automation; slewing support parts of precision grinders and milling machines.

Quality Assurance

NMT Crossed Roller Bearings implement full-process closed-loop quality control. High-purity bearing alloy steel raw materials are strictly inspected. Standard testing covers forging, heat treatment, raceway superfinishing and assembly calibration. Finished products complete rotary precision inspection, rigidity load tests, reciprocating rotation endurance tests and sealing performance verification. Bearings with insufficient precision, abnormal clearance and stiff rotation are strictly rejected. High-precision rotary bearing solutions are steadily supplied to automation and CNC equipment manufacturers.

Product Range

Non-tooth crossed roller bearings, internal-tooth crossed roller bearings, external-tooth crossed roller bearings; standard precision series, ultra-precision preloaded series. Professional selection guidance is offered according to load capacity, precision grade, rotating speed and service environment.

Brand Strength

NMT specializes in R&D and manufacturing of precision rotary bearings. Focusing on industry challenges of limited installation space, combined multi-directional loads and long-term high-precision positioning for robots and CNC rotary tables, NMT continuously optimizes raceway machining, roller sorting and preload assembly technologies to improve bearing rigidity, long-term precision stability and wear resistance. Automation equipment manufacturers are supported to simplify overall mechanical structures, boost positioning accuracy, reduce precision degradation failures and cut later calibration and maintenance workload, strengthening market competitiveness of high-end automation machinery.