Specifications
| Product Type | Flap Disc |
|---|---|
| Diameter | 4-1/2 in (115 mm) |
| Arbor / Bore | 7/8 in (22 mm) |
| Grit | 40 |
| Abrasive Grain | Zirconia Alumina |
| Backing | Fiberglass |
| Suitable Materials | Metal, Stainless Steel, Wood |
| Application | Grinding, Weld Blending, Finishing |
| Compatible Tool | Angle Grinder |
| Pieces per Pack | 10 |
| Max. Operating Speed | 13,300 RPM |
| Brand | Whitby Abrasives |
Description
- HIGH QUALITY - Premium VSM zirconia abrasive cloth backed by a high strength fiberglass disc enhances strength, durability, and extends disc life.
- MULTIPURPOSE - Curved edge design achieves optimal grinding results for fillet welds, corners, and other hard-to-reach places.
- SIZE - 4 1/2" x 7/8" (115mmx22mm) Grit 40#.
- PACKAGE - 10 PACK.
Frequently asked questions
Q: What is a flap disc used for?
A: It grinds and finishes in one step — weld blending, deburring, rust and paint removal, and surface finishing on metal and wood.
Q: What is the difference between Type 27 and Type 29 flap discs?
A: Type 27 is flat for surface and edge work on flat areas; Type 29 is conical for more aggressive stock removal and better contact on edges and contours.
Q: What grinder do these fit?
A: Standard angle grinders matching the arbor size listed in the title and specifications.
Q: Which grit should I choose?
A: Use a coarse grit (36–40) for heavy stock removal, medium (60–80) for general grinding, and fine (120+) for blending and finishing.
Why choose Whitby Abrasives
Whitby Abrasives Inc. is a Canadian supplier of professional grinding, cutting, sanding, and finishing abrasives. We focus on consistent quality, fair pricing, and fast shipping across Canada so fabricators, welders, woodworkers, contractors, and DIYers get abrasives that perform job after job. Have a question about sizing or the right grit for your project? Our team is happy to help.