Description

Intended for professional drill rig and drifter maintenance, the Piston (OEM 551 991 40) is engineered to fit the service requirements of the impact and reciprocating mechanism. Its role is to maintain reliable interaction between connected parts in a demanding rock drilling environment.

Application data lists compatibility with models including DD311 and DT820. Durable construction and controlled geometry support reliable service across the repeated load cycles common in rock drilling machinery. Designed for aftermarket use, it helps maintenance teams control spare-parts cost while keeping the correct application and cross-reference clearly identified.

Delkom combines rock-drilling spare-parts expertise with international supply capability, serving mining and tunneling customers across more than 100 countries. To confirm fitment and current stock, send Delkom Delkom 110 101 794 and OEM reference 551 991 40 together with the machine model or serial information.