NMT Ltd.
Corporate Communications Department
NMT Four-Point Contact Ball Bearings Bearings For Slewing Mechanisms, Compact Industrial Bearings Supporting Bidirectional Axial Loads
Rotating tooling and slewing mechanisms of construction machinery have limited internal installation space. Ordinary angular contact ball bearings must be used in pairs to bear bidirectional axial force, occupying extra space and complicating assembly procedures. Thanks to special raceway design, four-point contact ball bearings support bidirectional axial loads with a single unit and simplify mechanical structure design. Combined radial load capacity makes them ideal for various low-speed rotary transmission applications.
Japan NMT optimizes four-point contact ball bearings for slewing transmission conditions. Precisely machined raceway profiles ensure stable four-point contact of balls and uniform stress distribution. Stabilized steel heat treatment minimizes dimensional shift caused by long-duration rotation. Long-term grease lubrication is supported to reduce frequent maintenance. Suitable for low-speed reciprocating rotation, products are widely installed on compact rotary platforms, rotating sections of lifting machines, construction machinery slewing units, automatic positioning tooling and reversing components inside reducers.
Core Product Advantages
Single bearing bears bidirectional axial loads, eliminating matched installation and simplifying mechanical design.
Compact layout saves considerable axial assembly space compared with paired angular contact bearings.
Supports combined radial and bidirectional axial loads for multi-directionally stressed rotary mechanisms.
Excellent rotary rigidity delivers stable low-speed reciprocating rotation with controllable clearance.
Extended lubrication maintenance cycle, suitable for closed transmission structures inconvenient for frequent disassembly.
Application Scenarios
Rotary positioning worktables of automation equipment; slewing joints of compact construction machinery; rotating supporting sections of lifting machinery; reversing transmission structures in gearboxes and reducers; rotary devices for large welding and machining tooling; light-duty rotating conveying mechanisms in ports.
Precision Quality Assurance
NMT four-point contact ball bearings are manufactured from high-purity alloy bearing steel. Ultra-precision grinding is applied on inner and outer raceways. Steel balls are strictly graded to guarantee consistent contact conditions. All finished products pass rotary clearance inspection and simulated load testing with stable dimensional accuracy, resisting excessive clearance growth and abnormal abrasion during long-term reciprocating rotation.
Product Range
General four-point contact ball bearings with multiple clearance options; customized supporting service for rotary machinery is available.
Brand Strength
Japan NMT concentrates on bearing development for rotary transmission systems. The brand addresses limited installation space and complicated assembly challenges of rotating equipment. It alleviates common troubles including rapid wear and fast clearance enlargement, supplying compact slewing bearing solutions for automation equipment, construction machinery and lifting industries.