Description
Overview:
The Retaining Ring for Hikoki Hitachi rotary hammers is a Genuine OEM part engineered to secure components within the tool’s mechanism. Made from hardened spring steel for high strength and resilience, it prevents axial movement of parts under heavy vibration. This ring is sized for a D20 hole (20 mm, approx. 0.79 in), providing a precise fit in assemblies where reliability matters. It is suitable for use in rotary hammer drills such as the DH38MS and DH40MRY, helping maintain correct alignment and safe operation during demanding work. OEM No. 311229 confirms it matches original factory specifications for fit and performance, making it a dependable choice for routine maintenance and repairs on compatible Hikoki/Hitachi tools.
Key Features:
- Genuine Hikoki/Hitachi OEM retaining ring for assured compatibility and quality
- Sized for a D20 hole: 20 mm (approx. 0.79 in) internal fit for accurate retention
- Durable, heat-treated spring steel construction resists wear and fatigue
- Designed to withstand vibration and impact typical of rotary hammer use
- Corrosion-resistant finish to support long service life
- Direct replacement for OEM No. 311229 for straightforward identification
- Fits without modification on listed models for quick, reliable repairs
- Easy to install using standard circlip pliers to minimise downtime
Typical Applications:
Used within rotary hammer drill assemblies to retain bearings, gears, sleeves, or pins in position, preventing axial drift. Ideal for servicing hammer mechanisms, gearboxes, and clutch areas where a 20 mm bore retaining solution is required. Suitable for regular maintenance, refurbishments, and component replacements to keep tools operating safely and efficiently.
Also known as:
Circlip, snap ring, internal retaining ring (20 mm bore), bore circlip, retaining clip.
Fits Models:
DH38MS, DH40MRY, DH45MR, DH50MR, DH50MRY
Alternate Part Numbers:
311229, HKK311229
Product Specifications
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