Description
Sia 36 grit belt stock is the coarse end of the 3 in. x 21 in. 2925 sialoX belt range, built for fast first-pass work on metal parts that need material removed before finishing starts. Use it when a shop needs to knock down sharp edges, open up a scratch pattern, remove rust, or prep welded areas before moving into medium and fine grits.
The 2925 sialoX series is a general-fabrication abrasive from Sia Abrasives. Manufacturer literature lists aluminum oxide grain, X-wt cloth backing, closed coating, and resin-over-resin bond. In practical terms, that means this belt is built for strong edge contact and repeated passes on unalloyed steel, low-alloy steel, and non-ferrous metal rather than delicate final finishing.
Sia 36 grit belt applications
- Coarse sanding down on metal parts
- Weld preparation and post-weld cleanup
- Heavy deburring on cut or machined edges
- Rust and discoloration removal before finer sanding
- Initial scratch setting before a 60, 100, or 220 grit step
Sia 36 grit belt construction
Sia positions 2925 sialoX as a cost-effective all-round abrasive with high edge stability, high tear resistance, and long life. The coarse 36 grit version is the belt to reach for when the goal is cut rate and surface leveling. It is not the final finish belt in the sequence, but it sets up the surface so the next grits do less work and leave a more even result.
Technical specifications
| Property | Value |
|---|---|
| Brand | Sia Abrasives |
| Series | 2925 sialoX |
| SKU | SIA3939.8278.0036 |
| Size | 3 in. x 21 in. |
| Grit | 36 |
| Grain | Aluminum oxide |
| Backing | X-wt cloth |
| Use range | Coarse sanding, deburring, weld prep, rust removal |
Ordering notes
Choose 36 grit when the part needs a serious first cut before finishing. For smoother surfaces, step up through the matching 2925 sialoX grits after the heavy work is done. Browse related abrasives or visit Sia Abrasives for manufacturer background. For help matching abrasive grit to metal condition, call (800) 220-1966 or email [email protected].







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