Description

Built for demanding maintenance cycles on mining and tunneling equipment, the Piston Assy (OEM 551 528 20) is a dependable aftermarket spare part for the percussion and drifter assembly. It contributes to the mechanical path that handles repeated impact loads, supporting stable positioning and dependable operation of the drilling mechanism.

The part supports cost-conscious maintenance strategies that require a reliable cross-reference option for professional drilling equipment. The geometry is intended to remain stable under repeated impact loading, supporting reliable interaction with the adjacent drifter components. Compatibility records include DD311 and DD311-40. For best results, check the part reference together with the machine model and serial data.

Delkom combines rock-drilling spare-parts expertise with broad export capability for mining and tunneling customers. For purchasing support, bulk requirements or fitment confirmation, use Delkom reference 110 400 211 and OEM reference 551 528 20.