Description
Overview:
This genuine Makita ring spring (MPN 233973-4) is a hardened spring-steel component used inside Makita demolition hammer drills such as the HM1203C and HM1213C. It maintains the correct tension and positioning within the hammering mechanism, helping deliver consistent impact and smooth operation. Designed for professional trade and DIY maintenance, it replaces worn or broken springs that can cause weak striking performance, rattle, or premature wear of mating parts. Manufactured to Makita OEM tolerances for a precise fit, the ring spring withstands repeated shock loads and continuous use. Ideal for routine servicing or repair, it helps restore factory performance and extend tool life when fitted during scheduled maintenance or a rebuild of the impact assembly.
Key Features:
- Genuine Makita OEM part for assured compatibility and quality
- MPN 233973-4; engineered specifically for selected Makita demolition hammers
- Precision fit to restore smooth hammer action and impact consistency
- Hardened spring steel resists fatigue, deformation, and wear in heavy use
- Simple, straightforward installation during routine service or strip-down
- Helps reduce excessive play, vibration, and accelerated component wear
- Stable performance under heat, grease, and dust typical of site conditions
- Suitable for both professional and DIY tool maintenance
- Supports reliable day-to-day operation in construction, hire, and maintenance settings
Typical Applications:
Used when servicing the hammer mechanism to address weak impact, irregular striking, or unwanted rattle. Common during overhauls, preventative maintenance, or after inspection of internal parts on demolition hammers working in concrete breaking, chasing, and heavy masonry tasks. Helps maintain consistent tool performance and prolong the life of adjacent components under demanding site conditions.
Also known as:
Ring retainer spring, hammer drill mechanism spring, impact mechanism ring spring, preload ring spring, service replacement spring (Makita), mechanism tension ring, hammer action spring ring, impact drive spring ring.
Fits Models:
HM1203C, HM1213C, HM1214C
Alternate Part Numbers:
2339734
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