Description
Overview:
The O-Ring (S-18) is a genuine Hitachi/Hikoki sealing ring for rotary hammers, supplied as OEM No. 878885. Made from durable rubber in a circular profile, it provides a tight, reliable seal within the tool to prevent leaks and maintain internal pressure. This helps protect components, retain grease, and keep dust and debris out, supporting smooth, efficient operation. It is designed specifically for Hikoki rotary hammers, including the DH36DAL and DH18DBL, and is suitable for routine maintenance or fault rectification. As a direct replacement part, it restores the original sealing performance without modification. Its robust material and precise fit help prolong tool life and reduce downtime on site or in the workshop.
Key Features:
- Genuine Hitachi/Hikoki part for assured compatibility and quality
- Direct replacement for OEM No. 878885 (S-18 spec)
- Durable rubber construction for long service life
- Maintains an effective seal to prevent grease loss and dust ingress
- Supports optimal hammer performance and impact consistency
- Accurate fit for faster, straightforward installation
- Helps reduce wear on adjacent components by keeping contaminants out
- Suitable for scheduled maintenance and reactive repairs
Typical Applications:
Used within the sealing assemblies of Hikoki rotary hammers to retain lubrication and maintain internal pressure around pistons, cylinders, or gear housings. Ideal for restoring performance after teardown, addressing leaks, or as a preventative maintenance replacement in tools operating in dusty or heavy-use environments on construction, fit-out, and maintenance jobs.
Also known as:
Sealing ring, O ring, rubber seal, gasket ring, packing ring, rotary hammer seal. These terms may be used interchangeably in service manuals and parts diagrams when referring to circular rubber rings that form static or dynamic seals inside power tools.
Fits Models:
D13VL, DH18DBL, DH18DPC, DH24PG, DH24PX, DH25DAL, DH25DL, DH26PB, DH26PX, DH28PBY, DH28PMY, DH28PX, DH36DAL, DH36DBDL, DH36DL, DH36DMA, DH40MC, DH45ME, DH45MEY, DH52ME, DH52MEY, DV20VD, UM36DA
Alternate Part Numbers:
878885
Product Specifications
| L&S Part No. | HKK878885 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Hitachi/Hikoki |
| OEM No. | 878885 |
| Unit of Sale | 1 |
| Applications | D13VL, DH18DBL, DH18DPC, DH24PG, DH24PX, DH25DAL, DH25DL, DH26PB, DH26PX, DH28PBY, DH28PMY, DH28PX, DH36DAL, DH36DBDL, DH36DL, DH36DMA, DH40MC, DH45ME, DH45MEY, DH52ME, DH52MEY, DV20VD, UM36DA |
| Machine Type | Rotary Hammer |
| Fits Brands | Hikoki |
| Fits Models | D13VL | DH18DBL | DH18DPC | DH24PG | DH24PX | DH25DAL | DH25DL | DH26PB | DH26PX | DH28PBY | DH28PMY | DH28PX | DH36DAL | DH36DBDL | DH36DL | DH36DMA | DH40MC | DH45ME | DH45MEY | DH52ME | DH52MEY | DV20VD | UM36DA |
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