Precision-Ground Balls:
The bearing incorporates high-carbon chromium steel balls that are precision-ground to very tight tolerances. This ensures smooth rolling motion, minimizes friction, and distributes loads evenly.
Grease Fittings and Vents:
The bearing includes lubrication channels and grease fittings (zerks) for routine maintenance. Some designs may also feature a vent plug to relieve pressure caused by temperature changes during operation.
This 216-8922 slewing bearing is used for 301.5 301.6 301.8 excavator.
Related part number:
216-8922
139-4303
8T-4121
8T-4185
8T-4195
