Msb600 Breaker Front Assembly Outer Bush Lower Bush Front Cover Excavator Hammer Spare Parts

Widely recognized as chisel guide bush or upper inner bushing, the hydraulic breaker inner bush is a critical consumable for construction machinery hydraulic hammers. Mounted inside the front head assembly, it supports and restricts the chisel during continuous reciprocating strokes, which directly defines the working accuracy and service cycle of the entire breaker. Its core performance includes precise motion guidance that eliminates chisel shaking and offset during heavy breaking work, reducing abrasion on key internal parts. It provides effective buffering against instantaneous impact loads and vibration, protecting the mainframe and hydraulic components from structural damage. Furthermore, it assists the sealing system in isolating external contaminants, maintaining internal hydraulic tightness and stable working pressure.