Belparts excavator parts PC75UU-2 Slewing bearing 201-25-61100 Slew ring bearing for komatsu

Belparts excavator parts PC75UU-2 Slewing bearing 201-25-61100 Slew ring bearing for komatsu

A slewing ring consists of four core elements:

1. Inner and Outer Rings

   • Forged from high-carbon chromium steel (e.g., 42CrMo4 or 50Mn) for durability.

   • Heat-treated to HRC 55-60 hardness.

   • Gear teeth may be machined onto the outer/inner ring for drive mechanisms.

2. Rolling Elements

   • Ball bearings: Used in lighter loads (common in mini excavators).

   • Roller bearings: Cylindrical or tapered rollers handle heavy axial/radial loads (e.g., large excavators).

3. Raceways

   • Precision-ground tracks for rolling elements.

   • Hardened surfaces resist brinelling and wear.

4. Seals and Lubrication

   • Rubber or polyurethane seals prevent debris/water ingress.

   • Grease channels for automatic lubrication systems.

   •