Intelligent manufacturing equipment, industrial robots and CNC auxiliary machinery set strict requirements on precision, rigidity and installation volume of rotary components. Traditional combined bearing solutions require multiple bearings to withstand complex loads, which occupy abundant installation space and bring complicated assembly work. Accumulated tolerances of multiple components will reduce positioning accuracy of complete machines. Many CNC processing sites face splashing cutting fluid and accumulated metal dust. Bearings with simple seals cannot block contaminants. Foreign matters entering raceways trigger rapid precision attenuation and undermine processing stability.

Robot joints and precision indexing platforms bear alternating overturning moments during startup, stop and direction switching. Ordinary bearings lack sufficient rigidity and tend to deform elastically under loads, generating positioning errors and lowering processing and testing yield. Plenty of precision equipment pursues miniaturization and lightweight design. Complex supporting assemblies are hard to arrange inside narrow cavities. Once bearing precision fails, the whole precision transmission unit needs disassembly maintenance, which brings long downtime and severely reduces capacity of automatic production lines. The market demands compact cross roller bearings capable of bearing complex loads with high precision and rigidity.

NMT Cross Roller Bearings adopt high-purity bearing alloy steel processed by precise forging and heat treatment. Raceways possess sufficient surface hardness and excellent deformation resistance. Optimized dimension matching of perpendicularly crossed rollers realizes even load distribution to resist complex loads and alternating overturning moments. Micron-level ultra-precision grinding is conducted on inner and outer ring raceways for strict clearance control. Adjustable clearance types and preloaded versions are optional to satisfy equipment with different precision requirements.

Wear-resistant dustproof seals are equipped to block dust, water mist and cutting impurities from eroding rolling contact surfaces and extend precision retention cycle. Integrated inner and outer ring structure enables easy assembly by bolt locking and greatly simplifies mechanical design of equipment. Abundant specifications cover miniature automation mechanisms and large rotary tables. Standard dimensions enjoy great interchangeability for direct replacement during upgrading of new and existing precision equipment. Enhanced sealing configuration can be provided for heavily dusty processing environments to boost protection performance.

Core Product Advantages

Cross arranged rollers enable single bearing to withstand radial loads, axial loads and overturning moments simultaneously and simplify mechanical structure;

Ultra-thin compact structure saves installation space and supports miniaturization and lightweight design of precision equipment;

Super-precision grinding of raceways achieves high rotary accuracy and outstanding rigidity with minor deformation and stable positioning;

Various clearance specifications including adjustable clearance and preloaded types are available for different precision scenarios;

Wear-resistant sealing assemblies isolate dust and cutting fluid effectively and maintain original rotary accuracy for long term;

Complete standardized specifications allow convenient disassembly and replacement for robots and CNC rotary equipment upgrading.

Typical Application Scenarios

Joints of 6-axis industrial robots and rotary parts of collaborative robots; CNC rotary tables and 4th-axis indexing plates of machining centers; optical inspection rotary platforms and vision measuring equipment; automatic turnover tooling and precision servo rotary mechanisms; semiconductor automatic rotary modules; rotary devices of small CNC grinders and milling machines.

Quality Assurance

NMT Cross Roller Bearings implement full-process precise quality control. Raw materials receive ultrasonic flaw detection to check internal defects. Heat treatment batches are sampled for metallographic inspection. Rollers, inner rings and outer rings are sorted after precision grinding. All finished products pass rotary accuracy inspection, rigidity load tests and sealing durability experiments. Non-compliant products with insufficient precision and out-of-tolerance clearance are strictly rejected. Precision bearing supporting solutions are steadily supplied to intelligent equipment and automation machine tool manufacturers.

Product Range

Internal gear type, external gear type and gearless type; normal clearance type, adjustable clearance type and high-precision preloaded type; basic dustproof seal version and enhanced water & debris resistant seal version. One-on-one selection guidance is offered based on rotary accuracy, load and environmental dust level.

Brand Strength

NMT specializes in R&D and manufacturing of precision transmission bearings. Targeting industry pain points of automatic precision rotary mechanisms such as limited installation space, complex combined loads, easy precision loss during long-term operation and deformation induced by overturning moments, NMT continuously optimizes raceway grinding technology, roller layout and sealing systems. High-precision high-rigidity cross roller bearings are developed to help intelligent precision equipment maintain stable processing accuracy and cut maintenance frequency.