Carburized (Case-Hardened) Steel:
Process: This steel undergoes a specific heat treatment where the outer surface (the "case") is infused with carbon and then hardened, while the inner core remains softer and ductile.
Properties:
Extremely Hard Exterior: The hardened case (often HRC 60+) provides superior wear resistance on the bearing surface.
Shock-Resistant Interior: The soft, ductile core makes the bushing highly resistant to shock and impact, preventing catastrophic brittle fracture. This is crucial for the high-impact duty cycle of a 385C.
This 504-7633 bushing is used for 336 336GC 340 330 330GC 326 excavator.
Related part number:
572-2383
504-7633
504-7633
