Grinder Fiber Discs
Choosing Grinder Fiber Discs for Metal
Grinder fiber discs are resin-bonded abrasive discs for aggressive metal removal: beveling, weld grinding, and stripping rust and scale. This collection includes Diablo aluminum oxide discs in 4, 4-1/2, 5, and 7 inch sizes from 24 to 80 grit, with bulk packs for shops. Mirka ceramic alumina discs, including Ceramic Supreme for stainless steel, run in 24 and 36 grit. Bosch X-Lock fiber discs come in 25-packs, and DeWALT offers 7-inch XP3 Quick Lock discs.
What to Look For
- Grain. Aluminum oxide is a solid choice for mild steel. Ceramic grain cuts faster under pressure and suits stainless and harder alloys.
- Grit. 24 and 36 grit hog off welds and bevels. 50 to 80 grit blends and preps for paint.
- Mounting. Standard fiber discs need a backing pad. X-Lock and Quick Lock discs use their own mounting systems.
- Size. Match the disc to the grinder and backing pad, from 4-inch to 7-inch.
Shop grinder fiber discs at The Tool Nut, an authorized dealer since 1994, with free shipping on most orders and rewards points on every purchase.
Grinder Fiber Discs FAQ
Fiber disc or flap disc?
A fiber disc cuts faster and stays flat, so it is the pick for heavy removal and beveling. A flap disc grinds and blends in one step and leaves a smoother finish, but removes material more slowly.
Do X-Lock fiber discs fit a standard grinder?
X-Lock discs are made for the X-Lock mounting system. For a standard threaded-spindle grinder, choose a conventional fiber disc and a matching backing pad.