Original Bosch hammer piston — part number 1618700093. Precision-machined piston for the blow mechanism in Bosch SDS‑plus rotary/demolition hammers; restores impact consistency and smooth striker action.

Fitment: direct replacement for the GBH 4‑32 DFR (Type : 3 611 C32 100) rotary hammer and shown in Bosch power tool parts diagrams and parts lists for that model; it also appears for compatible demolition/rotary hammer variants such as RH432VCQ / DD544 / BMH 32-XE and RH432VCQ - Cross reference with the 10 digit version code from the side of the machine to confirm fit.

Details you’ll care about: manufactured to original Bosch tolerances from hardened, ground steel to resist scoring and wear in the piston chamber; finished for a tight fit with the striker and seals so impact energy is maintained and blow‑out or power loss is eliminated after installation. This item is listed in Bosch power tool spare parts diagrams for GBH 4‑32.

Quick use note: fits into the piston/cylinder assembly of the rotary hammer and is the correct replacement when the tool shows reduced impact force, excessive internal wear, or piston scoring — a straightforward repair to get the tool back to factory performance.

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