The 03 series is a premium toothless four-point contact ball slewing bearing engineered by European standard manufacturing specifications, tailored for light to medium-duty rotary systems requiring simplified structure, flexible drive matching and consistent long-term operational stability. As a classic non-geared slewing ring lineup from LYMC, the 03 series abandons traditional gear transmission structures, focusing on pure rotary performance and universal mechanical adaptability.
Construction machinery such as cranes and excavators
Aerial work platforms and man lifts
Solar tracking systems
Radar and antenna positioning systems
Materials handling equipment


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Designed with industry-proven four-point contact ball technology, the 03 series features high-precision steel balls paired with induction-hardened gothic arch raceways. This structural configuration enables each rolling element to form four stable load-bearing contact points, allowing the bearing to efficiently withstand combined axial forces, radial forces and dynamic overturning moments simultaneously. The uniform stress distribution effectively suppresses mechanical wear, rotational play and operational vibration under cyclic continuous rotation and variable load conditions. Compared with conventional two-point contact bearings, the 03 series achieves higher structural rigidity and superior dynamic stability for prolonged service cycles.
The gear-free design stands as the core competitive advantage of the 03 series. With a smooth integral ring structure without internal or external gear teeth, this bearing completely eliminates common drawbacks of geared slewing bearings, including transmission backlash, meshing noise and tooth surface fatigue wear. Free from fixed gear ratio limitations, it supports diverse flexible drive solutions such as servo direct drive, hydraulic rotary drive and friction drive, providing maximum design freedom for equipment integrators. This characteristic makes it particularly suitable for precision positioning equipment, low-noise operating machinery and customized rotary systems with compact layout requirements.
