Description
Overview:
This Genuine Makita Seal Ring (part number 421907-1) is a black, durable elastomer sealing ring designed to restore and maintain the performance of your Makita rotary hammer drill. It fits the Makita HR4011C and HR4001C models and provides a tight, reliable seal within the mechanism, helping to prevent lubricant leakage and dust ingress. By keeping the internal system sealed, it supports stable hammering force and smooth operation, reducing wear on moving parts and helping the tool last longer. Built to Makita's OEM standards, it offers an exact fit and dependable function, making it suitable for professional trades, hire fleets, and keen DIY users who need consistent performance from their hammer drills in tough conditions.
Key Features:
- Genuine Makita OEM part (421907-1) for assured compatibility and fit
- Tough elastomer construction for oil and grease resistance
- Helps maintain internal pressure and lubrication to prevent leaks
- Protects against dust and debris ingress in harsh site environments
- Supports consistent impact energy and drilling efficiency
- Reduces premature wear on piston, cylinder, and gearbox components
- Simple like-for-like replacement during routine servicing
- Stable performance under continuous or heavy-duty use
- Precisely sized for the specified Makita hammer drill housing
- Reliable choice for preventative maintenance and repairs
Typical Applications:
Used during maintenance or repair of Makita hammer drills when symptoms such as grease seepage, reduced striking power, or increased vibration appear. Ideal for restoring sealing integrity on tools used for drilling, chiselling, and breaking tasks in concrete, masonry, and stone on construction sites, workshops, and domestic renovation projects.
Also known as:
Often referred to as an O-ring, sealing gasket, packing ring, rubber seal, rotary hammer gasket, or oil seal. These terms describe the same type of component used to keep mechanisms sealed against fluid loss and contamination in power tools.
Fits Models:
HR4011C, HR4001C
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