Sia Siafast 6 Inch Vacuum Backup Pad, 15 Hole Firm

Description

The Sia Siafast 6 inch vacuum backup pad brings a 15 hole dust extraction pattern to a firm density platform sized for larger panels and faster stock removal. Matched to a vacuum-ready random orbital sander, the 15 hole pattern pulls sanding dust through the pad and disc instead of letting it load the abrasive face, which keeps cut rate consistent deeper into a disc’s service life.

Moving up from a 5 inch pad to this 6 inch size covers more surface per pass, which matters on larger panels, countertop sections, and any job where the goal is fewer passes rather than more precision in a tight radius. Pair the larger platform with the firm density and the pad is built for leveling speed rather than contour work.

Where the vacuum backup pad is used

• Auto body and collision shops sanding large panels on a dust-extraction sander where airborne dust has to stay out of the booth
• Cabinet shops and furniture finishers keeping dust off the workpiece and the surrounding shop floor
• Solid surface fabricators working large countertop and panel sections that would take multiple passes with a smaller pad
• Any shop running a central vacuum or dust-shroud sander that needs a matching hole pattern to keep suction effective

How the vacuum backup pad holds up

Firm density keeps the 6 inch face flat under load, so the pad levels large panel sections instead of rounding the edges over long strokes the way a softer pad would. The 1/2 inch thickness gives enough cushion to ride minor surface irregularities while the firm core still transmits pressure evenly across the full face.

Aligning the pad’s 15 holes to the disc and sander’s dust ports keeps extraction working at full strength through the pad’s service life. A misaligned hole pattern chokes airflow at the pad even when the disc and sander are matched correctly, so check alignment any time a new disc goes on.

Backup pad specs

• Diameter: 6 in
• Thickness: 1/2 in
• Hole pattern: 15H (15 hole dust extraction)
• Edge density: Firm
• Attachment: Hook and loop
• Compatible discs: Siafast and standard hook and loop sanding discs, 6 in diameter, 15 hole pattern

Confirm the disc hole pattern matches the pad before ordering, since a mismatched pattern cuts dust extraction efficiency even when diameter and attachment type line up. Browse Chemical Concepts abrasives for 6 inch 15 hole discs, or check sia’s full pad and disc lineup at siaabrasives.com.

Need Help?

Need help matching a vacuum backup pad’s hole pattern to your sander and discs? Call (800) 220-1966 or email [email protected].