Description
Overview:
This Ring Spring (233917-4) is a Genuine Makita OEM component for rotary hammers, including models such as BHR202 and BHR240. Made from resilient spring steel, it sits within the tool holder assembly to provide the precise radial tension needed for secure bit retention and smooth engagement of the hammer/drill mechanism. Replacing a worn or fatigued spring restores consistent performance, reduces play at the chuck, and helps the tool cope with continuous impact and vibration. Designed to match Makita specifications for a like-for-like fit, it is suitable for professional users and DIY maintenance on compatible Makita BHR, DHR, and HR series machines. Use it when the original spring shows signs of loss of tension, deformation, or when the bit locking action becomes inconsistent.
Key Features:
- Genuine Makita OEM part for assured compatibility and fit
- Precision-formed spring steel for strength and long service life
- Maintains correct bit retention and smooth engagement in the tool holder
- Direct replacement for MPN 233917-4; no modifications required
- Reliable under high vibration, impact, and dusty site conditions
- Helps restore consistent drilling and chiselling performance
- Straightforward to fit during routine service or chuck overhaul
- Suitable for heavy-duty site use, workshop repairs, and tool refurbishment
Typical Applications:
Used during maintenance or repair of the front-end/tool holder on Makita rotary hammers when bits are not locking firmly, the chuck feels loose, or engagement is irregular. Ideal for overhauling the bit locking assembly to restore reliable operation on tools used for drilling anchor holes in concrete and masonry, chasing, and light chiselling where repeated impacts and dust accelerate wear.
Also known as:
Retainer spring, bit lock spring, chuck retaining spring, sleeve spring, tool holder retainer, locking spring, hammer assembly spring, chuck spring, bit retention spring.
Fits Models:
BHR202, BHR240, BHR241, BHR261, DHR202RF, DHR202RFE, DHR202RM1J, DHR202RMJ, DHR202SMW, DHR202Z, DHR241RFE, DHR241RMJ, DHR241Z, DHR263ZJ, DHR264ZJ, HR2020, HR2230, HR2432, HR2440, HR2450, HR2450T, HR2460, HR2470, HR2470T, HR2811F, HR2811FT
Alternate Part Numbers:
2339174
Product Specifications
| L&S Part No. | 233917-4 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Makita |
| OEM No. | 233917-4 |
| Unit of Sale | 1 |
| Applications | BHR202, BHR240, BHR241, BHR261, DHR202RF, DHR202RFE, DHR202RM1J, DHR202RMJ, DHR202SMW, DHR202Z, DHR241RFE, DHR241RMJ, DHR241Z, DHR263ZJ, DHR264ZJ, HR2020, HR2230, HR2432, HR2440, HR2450, HR2450T, HR2460, HR2470, HR2470T, HR2811F, HR2811FT |
| Machine Type | Rotary Hammer |
| Fits Brands | Makita |
| Fits Models | BHR202 | BHR240 | BHR241 | BHR261 | HR2020 | HR2230 | HR2432 | HR2440 | HR2450 | HR2450T | HR2460 | HR2470 | HR2470T | HR2811F | HR2811FT | DHR202RF | DHR202RFE | DHR202RM1J | DHR202RMJ | DHR202SMW | DHR202Z | DHR241RFE | DHR241RMJ | DHR241Z | DHR263ZJ | DHR264ZJ |
