Specifications
| Product Type | Flap Disc (Type 27 / flat) |
|---|---|
| Diameter | 9 in (230 mm) |
| Arbor / Bore | 7/8 in (22 mm) |
| Grit | 40 (coarse) |
| Pieces per Pack | 2 |
| Abrasive Grain | Aluminum Oxide |
| Backing | Fiberglass |
| Suitable Materials | Steel, Stainless Steel, Wood |
| Application | Weld grinding, blending, rust & paint removal, surface finishing |
| Compatible Tool | 9 in Angle Grinder |
| Max. Operating Speed | 6,650 RPM |
| Brand | Whitby Abrasives |
Descripción
Whitby Abrasives 9" Type 27 flap discs combine aggressive grinding and finishing in a single abrasive for large 9" angle grinders. Built on premium aluminum oxide cloth over a rigid fiberglass backing, this 2-pack of 40-grit discs removes welds, rust, paint, and heavy stock fast, then blends the surface smooth — all in one step.
The Type 27 (flat) profile is ideal for flat surface and edge work, giving you broad, controlled contact across steel, stainless steel, and wood. The coarse 40 grit makes quick work of weld beads, mill scale, and rough stock on big jobs.
Key features
- Grinds and finishes in one step — replaces a separate grinding wheel and sanding disc
- Premium aluminum oxide grain cuts fast and stays sharp on metal and wood
- Large 9" diameter covers more surface for faster work on big jobs
- Rigid fiberglass backing plate runs cool and resists cracking
- Type 27 flat profile for surface and edge grinding
- Fits 9" angle grinders with a 7/8" arbor
Applications
- Weld grinding and blending
- Heavy stock and mill-scale removal
- Rust, paint, and coating removal
- Surface finishing on steel and stainless steel
- Woodworking and shaping
Specifications
| Product type | Flap Disc |
| Abrasive / material | Aluminum oxide |
| Diameter | 9 in (230 mm) |
| Arbor | 7/8 in (22 mm) |
| Disc type | Type 27 (flat) |
| Grit | 40 (coarse) |
| Pack quantity | 2 pieces |
| Brand | Whitby Abrasives Inc. |
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: 9 inch angle grinders with a 7/8 inch arbor.
Q: Which grit should I choose?
A: This is a coarse 40 grit for heavy stock removal and weld grinding; step up to finer grits to blend and finish.
Q: Do you ship within Canada?
A: Yes — Whitby Abrasives is a Canadian company and ships across Canada.
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.