NMT Ltd.
Corporate Communications Department
NMT Precision Cross Roller Bearings Ultra-Thin High Rigidity High Precision Cross Roller Bearings For Robot Turntables, CNC Indexing Plates And Automatic Rotary Platforms
Industrial robots and precision CNC turntables have strict restrictions on overall dimensions. Traditional bearing solutions require multiple sets of bearings to bear radial loads, axial loads and overturning moments simultaneously. Excessive components enlarge mechanism volume, and accumulated assembly errors deteriorate rotary positioning accuracy. Conventional slewing bearings are bulky and fail to meet lightweight and compact design requirements of automation equipment.
Plenty of precision automation equipment operates with cutting fluid and dust. Bearings with simple sealing are vulnerable to contaminant intrusion, leading to roller abrasion, enlarged rotary clearance and positioning drift after long-term operation. High-precision rotary platforms demand minimal runout. Ordinary rollers lack dimensional consistency and easily generate vibration during rotation, disturbing optical inspection and precision machining quality. The market demands precision cross roller bearings with ultra-thin profile, high rigidity and multi-directional load capacity.
NMT Precision Cross Roller Bearings adopt high-purity bearing alloy steel with stabilizing heat treatment to minimize long-term operational deformation. V-shaped raceways are processed by ultra-precision grinding with superior surface finish. Cross arranged rollers evenly share loads from all directions and resist overturning deformation.
Adjustable clearance types and pre-assembled preloaded versions are available to match equipment of different precision levels. Various sealing components are optional for clean dry workshops and processing sites with cutting fluid and dust. Standard mounting holes on inner and outer rings simplify positioning and facilitate modular mechanical design. Compared with combined traditional bearing solutions, the bearings greatly reduce mechanism thickness, realize lightweight equipment design, sustain stable high-precision rotary performance and cut regular calibration frequency.
Core Product Advantages
Cross roller layout enables single bearing to carry radial loads, axial loads and overturning moments and simplify mechanical structures;
Ultra-thin compact profile saves installation space and satisfies lightweight and miniaturized design of automation machinery;
Ultra-precision grinding for raceways and rollers delivers low rotary runout, high rigidity and stable positioning accuracy during long service;
Adjustable clearance and preloaded versions are available for applications ranging from general precision to ultra-high precision;
Multiple sealing options resist erosion from dust and cutting fluid and extend bearing service life under processing conditions;
Standard mounting holes ensure easy assembly for modular design of rotary tables and robot joints.
Typical Application Scenarios
Wrist joints and rotary bases of 6-axis industrial robots; CNC indexing plates and 4th-axis rotary units of machine tools; optical rotary platforms for visual inspection equipment; precision rotary devices for semiconductor automation; rotary fixtures for laser processing equipment; turntables of precision measuring instruments; rotary sorting units for compact automated warehouses.
Quality Assurance
NMT Precision Cross Roller Bearings implement full-process control covering raw material forging, aging stabilization heat treatment, ultra-precision raceway grinding, roller grading selection and dust-free assembly. All finished products pass rotary precision inspection, rigidity load testing and sealing durability test. High-precision rotary bearing solutions are steadily supplied to manufacturers of industrial robots, precision machine tools and optical automation equipment.
Product Range
Complete lineup of inner and outer diameter specifications including standard clearance type and precision preloaded type. Professional selection guidance based on positioning accuracy, load moment, operating environment and rotation speed is available.
Brand Strength
NMT specializes in the R&D and manufacturing of precision rotary bearings. Targeting common challenges of robot joints and precision turntables including limited installation space, complex multi-direction loads, difficulty in maintaining long-term precision and contaminant intrusion risk, NMT continuously optimizes raceway profile design, stabilizing heat treatment and sealing structure to develop high-precision cross roller bearings and guarantee long-term accurate and stable operation of high-end automation equipment.