Makita 422689-8 — Genuine Makita bumper for impact drivers. Injection-moulded rubber shock bumper that sits around the bit sleeve/hammer case to absorb impacts, reduce wear on the hammer/anvil assembly, and keep the bit sleeve returning smoothly. Sold as a single replacement piece (part no. 422689-8) and listed in Makita parts diagrams for the DTD172 impact driver.

Easy to swap: the bumper presses into the hammer-case area (item 8 in the parts diagram) and is compatible with the DTD172 series; the same part number also appears on parts listings for later XDT19-series impact-driver assemblies, so it’s commonly referenced across Makita impact-driver parts docs.

If you’re repairing an impact driver and want the correct replacement, this original Makita bumper is the direct-fit component shown in Makita spare parts diagrams and will restore the protective cushioning and bit-sleeve feel.

Browse our full range of Makita impact driver parts. Makita hammer drill parts.