Makita 317821-6 — Gear Housing Cover (original Makita)
Keep your grinder’s geartrain protected with the original Makita gear housing cover, part number 317821-6. This replacement cover is a factory-fit component that restores the gearcase sealing and mounting points to their original condition.
Example models this cover fits (common examples):
- 9553NB , 9554NB , 9555NB (100–125 mm class).
- 9557NB and 9558NB (4-1/2" / 115 mm and 5" / 125 mm models).
- Cordless angle grinders such as BGA450 / BGA452.
(Use your tool’s parts breakdown to confirm exact fit for your model.)
Key details:
- Part number: 317821-6 (genuine Makita gear housing cover).
- Application: replacement gear housing/gearcase cover for compatible Makita angle grinders and die grinders; designed to match factory mounting points for a direct, drop‑in fit.
- Typical wheel sizes on tools that use this cover range from about 100 mm to 125 mm (many common models are 115 mm / 4-1/2"). Confirm your model’s wheel diameter when checking fit.
- Sold individually; mounting/fastening screws or other hardware may be sold separately — check your model’s parts breakdown if a full reassembly kit is needed.
If your grinder’s gear housing cover is cracked, stripped, or missing, replacing it with the original Makita 317821-6 restores the proper mounting and protection for the geartrain so you can safely return the tool to service.
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