Description
Overview:
The Makita Bearing Box 9553NB/9556NB&PB (OEM 318331-6) is a genuine replacement bearing housing for selected Makita angle grinders. It is a robust, precision-cast metal body (commonly a die-cast aluminium alloy) that locates and supports the armature/spindle bearing at the front of the grinder. By keeping the rotating parts correctly aligned, it helps maintain smooth running, reduces vibration, and protects gears and bearings under load. This part is designed for popular compact Makita grinders used on-site and in workshops, including the 9553NB and 9556NB. Fitting the correct bearing box restores proper tolerances and contributes to tool safety, performance, and service life, especially where the original housing has worn, cracked, or become distorted through heavy use.
Key Features:
- Genuine Makita part for assured compatibility and performance (OEM 318331-6)
- Precision fit to maintain bearing and gear alignment under load
- Durable, corrosion-resistant cast metal housing for long service life
- Helps reduce noise and vibration caused by worn or misaligned components
- Direct replacement using the existing fixings on the grinder body
- Supports smooth operation and protects motor and gear components
- Manufactured to Makita tolerances for reliable sealing and fitment
- Suitable for routine maintenance and refurbishment to minimise downtime
- Stable support for the front bearing to prevent premature wear
- Consistent performance across a wide range of compatible Makita grinders
Typical Applications:
Used during servicing or repairs when the front bearing support is worn, cracked, or out of round. Ideal for restoring correct spindle and gear alignment after heavy site use, abrasive contamination, or impact damage. Helps address excess play, grinding noises, or overheating linked to bearing misalignment in everyday metalworking, fabrication, and construction tasks.
Also known as:
Bearing housing, front bearing box, gear case bearing box, nose housing, front housing, motor bearing carrier, grinder bearing support, spindle bearing carrier.
Fits Models:
9553NB, 9554NB, 9555NB, 9556NB, 9556PB, 9557NB, 9557PB, 9558NB, 9558NBR, 9558PB, BGA450, BGA452
Product Specifications
| L&S Part No. | 318331-6 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Makita |
| OEM No. | 318331-6 |
| Unit of Sale | 1 |
| Applications | 9553NB, 9554NB, 9555NB, 9556NB, 9556PB, 9557NB, 9557PB, 9558NB, 9558NBR, 9558PB, BGA450, BGA452 |
| Machine Type | Angle Grinder |
| Fits Brands | Makita |
| Fits Models | BGA450 | BGA452 | 9553NB | 9554NB | 9555NB | 9556NB | 9556PB | 9557NB | 9557PB | 9558PB | 9558NB | 9558NBR |
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