Description
The siafast backup pad gives 5 inch hook and loop abrasive discs a medium-support mounting face for random orbital sanding, finishing, and surface prep. This pad uses a 5 hole dust pattern, a 1/2 inch thick medium edge, and a 5/16-24 threaded arbor, matching common pneumatic and electric sanders used in body work, cabinet finishing, solid surface fabrication, and general shop sanding.
Where This Siafast Backup Pad Fits
Use this pad when the job needs the fast disc changes of siafast hook and loop attachment with more control than a soft contour pad. The medium edge supports flat panels, cabinet doors, trim stock, and fair curves without feeling as rigid as a hard backup pad. The five-hole face helps align with compatible dust-extraction abrasive discs, while the 5/16-24 thread fits many standard orbital sander spindles used in North American shops.
The siafast fastening system is built around matched hook and loop geometry, so the abrasive disc seats quickly and can be changed many times without adhesive residue on the pad face. That matters on finishing benches where operators step through grits, inspect scratch pattern, and move from leveling to finish sanding without changing tools.
How This Siafast Backup Pad Holds Up
A backup pad is a wear item. Replace it when the hook face stops gripping discs, when the foam edge rounds unevenly, or when the threaded insert no longer runs true on the spindle. A worn pad can create chatter, swirl marks, or edge marks even when the abrasive disc is fresh. Keeping a spare near the sander prevents a finishing problem from turning into rework on a nearly completed panel.
Siafast Backup Pad Specs
| Property | Value |
|---|---|
| SKU | SIA0168.2848.0000 |
| Diameter | 5 in |
| Attachment | siafast hook and loop |
| Hole pattern | 5 hole |
| Thickness | 1/2 in |
| Edge | Medium |
| Thread | 5/16-24 |
Order this pad for shops standardizing on 5 inch hook and loop discs, especially where a medium edge gives the right balance between flatness and forgiveness. Browse related abrasives for compatible discs, interface pads, and finishing accessories. For broader siafast system background, visit sia Abrasives.
Need Help?
Need help matching pad density, hole pattern, or thread size to your sander? Call (800) 220-1966 or email [email protected].
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