3M
3M 13639 surface-conditioning belt 18 in power
Non-woven aluminium-oxide belt in coarse grade, 18 in by 3/4 in, for surface conditioning on power sanders
- TypeSanders
- Coarse grade removes material quickly on metal surfaces
- Non-woven aluminum oxide resists loading during extended use
- 18 in length fits standard belt sanders directly
- 3/4 in width suits detailed edge and contour work
- Semi-flexible scrim backing conforms to irregular shapes
18-inch surface-conditioning belt
The 3M 13639 belt measures 18 inches long by 3/4 inch wide for use with compatible portable or stationary sanders. Its non-woven aluminum oxide construction resists loading while delivering a coarse-grade finish. The semi-flexible scrim backing conforms to contours without sacrificing durability. This new belt suits metalworkers preparing surfaces for coating or blending scratches.
Coarse non-woven abrasive capacity
Aluminum oxide grain in a resin-bonded web removes oxidation, light scale and old coatings faster than fine-grade alternatives. The open structure sheds debris to maintain cutting action on flat or curved workpieces. Aggressive stock removal tapers off on hardened steels or when a mirror finish is required. The belt handles blending and deburring tasks where aggressive cutting is acceptable.
Scrim-backed belt interface limits
The 3/4-inch width fits only machines designed for narrow belts; wider sanders cannot accept it. Resin bond and scrim backing withstand normal heat but may degrade under continuous high-speed contact. Load resistance extends life on soft metals yet the coarse grade leaves a visible scratch pattern unsuited for final finishing. Users needing finer surfaces must switch to a different grade belt.
Highlights
- Coarse grade removes material quickly on metal surfaces
- Non-woven aluminum oxide resists loading during extended use
- 18 in length fits standard belt sanders directly
- 3/4 in width suits detailed edge and contour work
- Semi-flexible scrim backing conforms to irregular shapes
Specifications
| Type | Sanders |
|---|---|
| Brand | 3M |
| Model | 13639 |
Questions about this item
Will the 3M 13639 belt fit my existing 18 in sander?
The 13639 belt is 18 in long and 3/4 in wide, matching standard 18 in belt sanders that accept a 3/4 in width.
How can I confirm the 13639 is cutting correctly after installation?
The brown aluminum oxide non-woven surface should produce a consistent satin finish without loading; uneven marks mean the belt is misaligned or worn.
Does the 13639 pack include any backing pads or adapters?
The box contains only the 13639 surface-conditioning belt; backing pads or drive-wheel adapters must be purchased separately if your sander requires them.
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