Description
Overview:
The Tension Roller Arm for Makita 9403 Belt Sanders is a genuine Makita replacement part designed to keep the sanding belt correctly tensioned for smooth, consistent sanding. Supplied under OEM No. 163398-7, it is engineered to the original specifications for the Makita 9403, ensuring a precise fit and dependable operation. The robust metal arm supports the front roller assembly, helping to prevent belt slip, chatter and uneven wear. Used on machines that run 4 in x 24 in belts (100 mm x 610 mm), it maintains the correct belt load so the sander delivers steady stock removal and clean finishes. Suitable for workshop and site use, it is a practical maintenance item for tradespeople and DIY users who want to restore performance and prolong the life of their sander.
Key Features:
- Genuine Makita part for assured compatibility and quality
- Direct replacement for OEM No. 163398-7 for the Makita 9403
- Maintains accurate belt tension and tracking to reduce slip and edge fray
- Durable metal construction for long service life in dusty environments
- Engineered to original tolerances for smooth, low‐vibration sanding
- Helps prevent premature belt wear and protects the roller and bearings
- Suitable for machines using 4 in x 24 in (100 mm x 610 mm) belts
- Straightforward fit with standard hand tools and clear orientation
- Reliable fix for belt wandering, squeal, and inconsistent removal rates
- Supports routine servicing to keep the sander working at peak efficiency
Typical Applications:
Routine maintenance and repairs on Makita 9403 belt sanders where belt tension has weakened or tracking is unstable. Useful when symptoms include belt slippage, uneven sanding, or increased noise. Common in woodworking, carpentry, flooring preparation, site joinery, and refurbishment tasks where consistent, heavy-duty sanding is required.
Also known as:
Belt tension arm, sander tension roller arm, idler roller arm, front roller arm, belt tensioner arm, tensioner assembly for belt sander, belt tracking tension arm.
Fits Models:
9403
Alternate Part Numbers:
163398-7, 1633987
Product Specifications
| L&S Part No. | 163398-7 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Makita |
| OEM No. | 163398-7 |
| Unit of Sale | 1 |
| Applications | 9403 |
| Machine Type | Belt Sander |
| Fits Brands | Makita |
| Fits Models | 9403 |
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