Description
Overview:
This Tool Retainer is a genuine Makita part designed for selected hammer drills, including HR3540C and HR3541FC. It secures the drill bit in the chuck to prevent unwanted release during drilling or chiselling, helping maintain safe and consistent performance. Built from durable metal, it withstands repeated impacts typical in rotary hammer use. The Tool Retainer is a direct-fit component for compatible Makita machines and is suitable for routine maintenance or refurbishing worn locking hardware. Supplied to Makita specification, it offers dependable engagement with the tool shank and smooth operation of the locking mechanism. Manufacturer Part Number (MPN): 310257-8.
Key Features:
- Genuine Makita replacement part for assured fit and function
- Securely holds the drill bit to prevent loosening under vibration
- Durable metal construction for long service life in tough conditions
- Smooth locking action to support accurate drilling and chiselling
- Direct replacement with no modifications required on listed models
- Helps maintain tool safety by keeping bits positively retained
- Supports consistent productivity by reducing unplanned downtime
- Suitable for professional and DIY maintenance of compatible hammer drills
Typical Applications:
Used to restore or maintain the bit retention system on Makita hammer drills during concrete, masonry, stone, and structural drilling or chiselling tasks. Ideal when the original retainer is worn, damaged, or contaminated, helping ensure reliable bit lock-in for site work, trades maintenance, and workshop repairs.
Also known as:
Locking ring, bit retention spring, chuck collar clip, bit lock clip, tool shank clip, SDS tool clip, locking collar, chuck retaining ring.
Fits Models:
HR3540C, HR3541FC, DHR400ZK, DHR400ZKU
Alternate Part Numbers:
3102578
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