Makita 450034-7 Spare Part - CRANK CAP HR4511C

Original Makita crank cap — part no. 450034-7 — replacement crank/case cover for the crank assembly of select SDS‑Max rotary hammers. This small, molded cover protects the internal crank/gear area from dust and debris and secures surrounding components after gearbox work or an impact that cracked the original cap.

Specifics: Makita part 450034-7 is listed as the crank cap (sometimes shown as 4500347) and in some current parts listings is superseded or cross-referenced to Makita code 455525-3. It’s a direct-fit Makita replacement intended to restore proper sealing and alignment of the crank housing.

Fits (example models): commonly used on Makita HR4510C and HR4511C SDS‑Max rotary hammers; the same family of rotary-hammer parts lists and service kits also reference HR4501C in the HR45xx series. Confirm fit against your tool’s exploded parts diagram or the model number listings, but these are the typical models that use this cap.

Why this part matters: if the crank cap is cracked or missing you can get accelerated wear, grease loss, and grit intrusion into the gearbox — replacing it restores the original protection and keeps the crank assembly correctly retained. The cap is a straightforward swap during a gearbox or crank rebuild.

(Part shown and referenced in Makita parts diagrams as 450034-7 / 4500347; cross-reference 455525-3 where applicable.)

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