Description
Overview:
The Needle Roller D8x20 is a genuine Hitachi/Hikoki component designed to support high-load, high-frequency motion inside demolition hammers. Made from hardened bearing steel for wear resistance and dimensional stability, this single needle roller helps reduce friction and maintain smooth, consistent hammering performance. It is commonly used within the hammer's drive mechanism to support rotating or oscillating parts under impact loads. Sized at 8 mm diameter x 20 mm length (0.31 in x 0.79 in), it matches the original specification for a direct replacement. Ideal for professional and DIY maintenance, it keeps your tool working efficiently and extends service life. Suitable for Hitachi/Hikoki breakers including the H60MR and H60MRV.
Key Features:
- Genuine Part for assured compatibility and OEM build quality (313421)
- Hardened bearing steel construction for durability under impact and vibration
- Precision D8 x L20 sizing for accurate seating and smooth operation (8 mm x 20 mm / 0.31 in x 0.79 in)
- Helps reduce friction and wear on mating components to maintain performance
- Stable support for rotating/reciprocating parts in heavy-duty demolition use
- Direct replacement to match original tolerances, minimising setup time
- Suitable for routine servicing to restore efficiency and reduce downtime
Typical Applications:
Used during maintenance or overhaul of Hitachi/Hikoki demolition hammers to replace worn rollers in the drive/hammering mechanism. Supports reliable breaking, chasing, and demolition on construction sites, facilities maintenance, and hire fleet servicing where consistent, predictable tool performance is required.
Also known as:
Needle roller pin, bearing roller, needle bearing roller, roller element, needle pin (D8x20). These terms refer to the single roller element used within a needle bearing arrangement inside the tool.
Fits Models:
H60MR, H60MRV, DH40MRY, DH45MR, DH50MR, DH50MRY, H45MR
Alternate Part Numbers:
313421
Product Specifications
| L&S Part No. | HKK313421 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Hikoki |
| OEM No. | 313421 |
| Unit of Sale | 1 |
| Machine Type | Power Demolition Tools |
| Fits Brands | Hikoki |
| Key Features | - Genuine Hitachi/Hikoki part ensures compatibility with original equipment - Hardened bearing steel for durability under impact and vibration - Precision 8 mm x 20 mm size for accurate seating - Reduces friction and wear on mating components - Fits models H60MR, H60MRV, DH40MRY, DH45MR, DH50MR, DH50MRY, H45MR |
| Fits Models | DH40MRY | DH45MR | DH50MR | DH50MRY | H45MR |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
Related Products
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
