Description
Overview:
The Needle Roller D8x20 is a Genuine Hitachi/Hikoki OEM component designed for hammer drills and breakers where compact rolling elements are required to support moving parts and minimise friction. Manufactured from high‐quality steel, it helps maintain alignment and smooth motion inside the hammer mechanism. It measures 8 mm in diameter by 20 mm in length (0.31 in x 0.79 in), making it a precise fit where specified in the tool's service manual. Suited to demanding trade use, it is an effective replacement item during routine strip‐downs or full overhauls of models such as the DH38MS and H41MB. OEM No. 331536. Fitting a fresh roller helps protect mating shafts and housings, improves running efficiency, and extends the service life of your equipment.
Key Features:
- Genuine Hitachi/Hikoki OEM part for assured compatibility and performance (OEM No. 331536)
- Dimensions: D8 x 20 mm (0.31 x 0.79 in) for the specified locations in select hammer drills
- High-quality steel construction for strength and long service life under impact loads
- Reduces friction and wear on shafts and housings to help maintain correct clearances
- Helps restore smooth operation and consistent hammering efficiency
- Suitable for heavy-duty site use and frequent stop/start cycles
- Direct replacement component; straightforward to install during routine maintenance
- Stable running supports improved reliability and reduced downtime
- Compatible with key Hikoki/Hitachi models listed below
- Ideal for preventative maintenance as well as repair work
Typical Applications:
Used in the hammer and gearbox assemblies of professional and DIY rotary hammers and breakers during servicing or repair. Commonly replaced when addressing play, rough running, or noise in the drive train. Suitable for tools used in drilling, chiselling, and demolition of concrete, masonry, and similar materials.
Also known as:
Needle bearing, roller bearing, needle cage, bearing roller D8x20, roller element D8x20.
Fits Models:
DH38MS
H41MB
H60MC
Alternate Part Numbers:
331536
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