The slewing bearing in a machine like the Caterpillar 318C is designed with several distinct features to handle the extreme demands of excavation work:
High Load Capacity:
It is engineered to withstand immense axial loads (vertical forces from lifting), radial loads (side forces during digging and swinging), and overturning moments (the tipping force created when the boom is extended with a heavy load). This combination of loads is what defines it as a "moment-bearing" slewing ring.
Robust Internal Design:
It typically features a single-row ball bearing design with a four-point contact pattern. This design is compact yet incredibly strong, efficiently handling combined loads in a relatively small cross-section, which is ideal for the machine's profile.
The raceways (the tracks the balls run on) are heat-treated and precision-machined to provide high hardness and durability, resisting deformation under shock loads.
This 227-6080 slewing bearing is used for 318C 319C 3066 excavator.
Related part number:
227-6071
3B-8489
