Original Makita gear-housing packing — part no. 442117-7. This precision packing (gear-housing seal) sits between the gear housing and its cover on Makita diamond-core drills, preventing dust and debris ingress and helping retain lubrication so the gears run smoothly and wear more slowly.
Key points:
- Part: Gear housing packing / gear-housing seal, Makita 442117-7.- Fits: Makita 8406C diamond core drill (listed in the 8406C parts diagram).
- Sold as a single packing designed for a direct replacement in the gear housing; straightforward to fit when replacing the gear-housing cover gasket or service-sealing the geartrain.
If your 8406C has oil or gear contamination or the housing seal is flattened or missing, replacing this packing restores the proper seal and helps protect the internal gears.
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