Cutting discs are thin (typically 1–3 mm) and designed to slice through metal, stainless steel, and pipe cleanly. Grinding discs are thicker (4–8 mm) and are made to remove material, smooth welds, and deburr surfaces. Using a grinding disc to cut — or vice versa — is dangerous and will damage the disc. Always match the disc to the task.

For stainless steel, use a flap disc or grinding disc rated for stainless (zirconia alumina or ceramic grain). Start with 40–60 grit for heavy weld removal, move to 80 grit for blending, and finish with 120 grit for a smooth surface. Avoid standard aluminum oxide abrasives on stainless — they can contaminate the metal and cause rust.

A flap disc combines grinding and finishing in a single tool — overlapping abrasive flaps conform to the work surface, reducing heat and leaving a smoother finish than a conventional grinding wheel. Use flap discs when you need to grind and blend welds, remove paint or rust, or achieve a finish in one step. Grinding wheels are better for heavy stock removal where finish is not a priority.

Choose grit based on the task: 36–60 grit for aggressive stock removal, 80–120 grit for general sanding and shaping, 150–220 grit for fine finishing. Abrasive type also matters — zirconia for metal and hardwood, ceramic for high-performance metalworking, aluminum oxide for general-purpose wood. Always match the belt dimensions to your machine specifications.

We stock a full range including 4", 4.5", 5", 6", 7", 9", and 14" for both cutting and grinding applications. If you need a size or specification not listed in our store, contact us via the Get a Quote page and we'll source it for you.

Every abrasive disc has a maximum operating speed (RPM) stamped on it. Never exceed this rating — doing so risks disc failure and serious injury. Always confirm that your grinder's no-load RPM is equal to or lower than the disc's rated RPM before mounting. This is a non-negotiable safety step.

No. Cutting discs are not designed to withstand side-load forces. Applying lateral pressure to a cutting disc can cause it to shatter, which is extremely dangerous. Always use the correct disc type for the task.

Yes. We offer volume pricing for fabrication shops, MROs, and industrial buyers. Use the Get a Quote form on our website or email info@whitbyabrasives.com with your product requirements, quantities, and delivery timeline for a custom quote.

Yes — Whitby Abrasives ships across Canada. We are a Canadian seller and all pricing is in Canadian dollars. Contact us for freight quotes on large pallet orders.

We accept returns on unused, undamaged products in original packaging within 30 days of purchase. If you received incorrect or defective product, please contact us at info@whitbyabrasives.com and we will make it right.