Sanding Disc Backing Pads and Plates

Sanding disc backing pads and hook and loop backing plates hold the abrasive flat and supported on angle grinders, DA sanders and polishers. Fabricators use them to run resin fiber discs on a grinder, and body shops and detailers use the hook and loop plates to mount sanding and polishing discs. Match the pad's thread to your tool's spindle before you order.

• Backing pads for resin fiber discs in 4-1/2", 5" and 7", with a 5/8"-11 thread, for angle grinders
• 6" hook and loop backing plate with 6 holes and a 5/16"-24 thread, for DA orbital sanders and polishers
• 6" hook and loop backing plates with a 5/8"-11 thread, 2 per pack, for angle grinders, pneumatic grinders and vertical grinders, including a polyurethane version
• Hook and loop face that takes hook and loop sanding and polishing discs

Frequently asked questions

What does a sanding disc backing pad do?

A backing pad sits between the grinder and the disc. A resin fiber disc is thin and flexible, so it needs a backing pad to hold it flat and spread the pressure while you grind. The pads here come in 4-1/2", 5" and 7", all with a 5/8"-11 thread for angle grinders.

Which 6 inch backing pad fits my polisher?

For a DA orbital sander or polisher, use the 6" 6-hole backing plate with a 5/16"-24 thread. The other 6" plates have a 5/8"-11 thread and are listed for angle grinders and pneumatic or vertical grinders.

Can I use a hook and loop backing pad on an angle grinder?

Yes. The 6" hook and loop backing plates with a 5/8"-11 thread are listed for angle grinders, pneumatic grinders and vertical grinders. Centre the disc on the plate so it runs true. Check the maximum RPM marked on the plate and on the sanding or polishing disc, and never exceed the lower of the two.

Do I need a different backing pad for each sanding disc size?

Yes, for resin fiber discs. Use a pad that matches the disc diameter, so a 7" fiber disc goes on the 7" pad and a 4-1/2" disc on the 4-1/2" pad. For hook and loop sanding, the 6" plates take 6" hook and loop discs and pads.

Find more grinder accessories in our accessories collection and the discs that go on these pads in resin fiber discs, and see our fibre disc backing pad guide and angle grinder thread size chart.