Description
Overview:
This O Ring is a genuine Makita replacement part for selected hammer drills, made from durable rubber for long service life. It is engineered to provide a tight, reliable seal within the tool's mechanism, helping to prevent loss of grease and ingress of dust that can reduce performance. Suitable for demanding site and workshop use, it supports consistent impact and drilling efficiency by maintaining correct pressure and lubrication paths. Designed specifically for Makita HR4001C and HR4011C models, it offers a precise fit that helps restore factory performance and reliability. Manufacturer Part Number (MPN): 213962-5. The round cross‐section design is optimised for sealing grooves in rotating or reciprocating assemblies typically found in heavy‐duty hammer drills.
Key Features:
- Genuine Makita OEM part for assured compatibility and build quality
- Precision fit for correct sealing in HR4001C and HR4011C mechanisms
- Hard‐wearing rubber construction designed for repeated impact cycles
- Helps prevent grease leaks and dust ingress to protect internal parts
- Supports stable impact energy and drilling performance over time
- Simple to fit during routine servicing with minimal downtime
- Cost‐effective fix for performance loss caused by worn seals
- Suitable for professional and DIY maintenance of heavy‐duty hammer drills
Typical Applications:
Used during routine servicing or repair of hammer drills to replace worn or damaged seals in the impact/gear housing. Ideal when there is evidence of grease seepage, loss of impact strength, or contamination. Helps maintain tool efficiency on site tasks such as concrete drilling and chiselling, and in workshop environments where reliability and clean operation are essential.
Also known as:
Often referred to as a packing ring, toric ring, round‐section ring, joint ring, or O‐profile ring. These terms describe the same circular sealing component used to keep lubricants in and contaminants out within precision tool assemblies.
Fits Models:
HR4001C, HR4011C
Alternate Part Numbers:
2139625
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