Joints of industrial robots, CNC index tables, automated rotary stages and optical inspection turntables demand strict standards on space occupation, load capacity and rotational precision. Traditional bearing combinations require multiple bearing sets, leading to bulky structures and excessive space occupation, which cannot satisfy lightweight and compact design requirements. Cumulative assembly errors of multiple bearings cause large end face runout, deteriorating positioning accuracy and lowering finished product yield of processing and inspection equipment.

Many rotary mechanisms need to withstand radial loads, axial loads and overturning moments simultaneously. Ordinary single-type bearings cannot handle multi-directional combined loads. After long-term cyclic operation, precision equipment may suffer clearance variation and positioning deviation, and frequent calibration seriously reduces production efficiency. The market requires precision cross roller bearings featuring compact thickness, high rigidity and capability for combined loads.

NMT Precision Cross Roller Bearings adopt a structure with rollers arranged perpendicularly in a crossed layout. A single bearing can withstand radial loads, bidirectional axial loads and overturning moments simultaneously, greatly simplifying rotary mechanism design. The ultra-thin integrated structure reduces axial installation space and supports lightweight compact layout of machinery. Precisely graded and ground rollers cooperate with high-precision raceway machining to realize controllable rotary clearance, low runout and superior positioning accuracy.

The bearings feature outstanding rigidity with tiny deformation under load, maintaining stable rotary accuracy during long cyclic operation. Mounting through holes are reserved on inner and outer rings for direct bolt fastening without extra flanges to simplify mechanical design. Multiple preload options are available to adapt to precision positioning, low-speed heavy load and intermittent indexing applications, widely adopted in all types of precision rotary automation equipment.

Core Product Advantages

Crossed roller layout enables single bearing to sustain combined radial, axial and overturning loads and simplify transmission design;

Ultra-thin compact shape reduces installation thickness compared with multi-bearing assemblies for lightweight machine design;

High-precision machining of raceways and rolling elements achieves small rotary runout and excellent positioning accuracy for precision indexing and inspection;

Excellent rigidity ensures minimal deformation under load, stabilizing accuracy during long continuous operation and preventing positioning drift;

Standard mounting holes on inner and outer rings support direct bolting without transition supports, cutting component quantity;

Various preload grades eliminate rotary clearance, suppress vibration caused by start-stop impact and ensure stable operation;

Complete standard specifications facilitate quick selection and shorten equipment R&D cycle for automation manufacturers.

Typical Application Scenarios

Joints of 6-axis industrial robots and collaborative robot rotary pivots; CNC index tables and machine tool rotary worktables; rotary platforms for optical inspection equipment; automated welding rotary fixtures; semiconductor handling rotary modules; precision rotary units for radar and monitoring devices.

Quality Assurance

NMT Precision Cross Roller Bearings adopt high-purity bearing alloy steel. Raw materials are inspected for hardness and metallurgical structure. Inner and outer rings undergo precision forging, deep quenching heat treatment and multi-stage raceway superfinishing to strictly control raceway profile and dimensional tolerance. Rollers are graded to micron-level to guarantee dimensional consistency. After assembly, finished products pass rotary precision inspection, rigidity load testing and cyclic endurance tests. All nonconforming products are eliminated. NMT continuously supplies rotary support solutions for manufacturers of robots and CNC precision automation equipment.

Product Range

Standard cross roller bearings, preloaded cross roller bearings, ultra-thin cross roller bearings. Selection depends on load capacity, precision class, rotary speed and clearance requirements.

Brand Strength

NMT specializes in R&D and manufacturing of precision rotary bearings. Targeting working conditions of robot joints and CNC rotary tables that require combined load resistance, limited installation space and long-term stable precision, NMT optimizes raceway machining, roller screening standards and preload control technology. The brand solves common pain points such as bulky multi-bearing assemblies, large assembly errors, single load capacity and easy precision attenuation. It helps precision automation equipment improve positioning stability, cut calibration frequency and boost processing & inspection efficiency.