Collection: Flap Discs & Flap Wheels

Shop flap discs for angle grinders and flap wheels for die grinders and drills. Filter by disc type, diameter, grit and arbor to grind welds, remove rust and blend stainless or mild steel in one step. Need help choosing? Call 888-714-1410 or email sales.

Why buy from Pittsburgh Spray Equipment

• Help picking the right one: tell us the material, the tool and the result you need and we will match the product; call 888-714-1410, no phone tree
• Financing available: Credit Key and Klarna at checkout on qualifying orders

Type 27 vs Type 29 flap discs

Type 27 flap discs are flat and work best at a low angle (0 to 15 degrees) for blending and finishing flat surfaces. Type 29 discs are conical, so more abrasive touches the work at a steeper angle (15 to 25 degrees) for faster stock removal and edge grinding. Shaft-mounted flap wheels reach inside tubes, corners and contoured parts.

FAQ

What grit flap disc should I use?
36 to 40 grit removes heavy welds and mill scale fast, 60 grit is the all-purpose grinding and blending grit, 80 grit blends scratches, and 120 grit and finer prepares a surface for paint or a brushed finish.

Can I use one flap disc for steel and stainless?
Use a disc that is rated contaminant free (low iron, sulfur and chlorine) for stainless and aluminum, and do not reuse a disc on stainless after grinding carbon steel, which can cause rust spotting.

What does a 5/8"-11 spin-on flap disc do?
Spin-on (hubbed) flap discs thread straight onto a 5/8-11 grinder spindle with no flange nut, which speeds up disc changes and lets you grind closer to the hub.

When should I use a flap wheel instead of a flap disc?
Flap wheels conform to curved and inside surfaces such as tubing, rails, castings and corners where a flat disc cannot reach. Shaft-mounted wheels fit die grinders and drills; unmounted wheels fit arbor-style finishing tools.