Fast, Cool-Cutting Ceramic Flap Discs Built for Heavy Use

This 4-1/2" x 7/8" High Density Ceramic Flap Disc (Type 29) is built for shops that grind, shape, and smooth metal or wood all day. The angled Type 29 face gets into welds and edges standard discs can't reach, and the high-density construction packs in roughly 2x the abrasive material of a standard flap disc — so it runs cooler and lasts longer under continuous use.

Grit range: 36, 40, 60, 80, 120 (or grab the Sample Kit — one of each)
Fits: Standard 4-1/2" angle grinders, 7/8" arbor
Disc type: Type 29 — angled face for contouring, edge work, and weld grinding
Material: Premium ceramic grain — outlasts zirconia by up to 6x and aluminum oxide by up to 10x
Best for: Weld grinding, deburring, stock removal, surface shaping, wood contouring
Pack sizes: Individual or 10-Pack (best value for regular use)

Which Grit Should You Use?

Grit	Best For
36	Heavy stock removal, weld knockdown, rapid shaping
40	General-purpose grinding and stock removal
60	Blending and medium-level surface prep
80	Finer surface prep before finishing
120	Light finishing and smoothing passes

What Makes This a "High Density" Flap Disc?

High density ceramic flap discs pack roughly 2x the flaps of a standard disc into the same size. That extra material means the disc stays effective longer instead of wearing thin and losing cut speed — most shops see 2-3x the working life of a standard ceramic flap disc, up to 6x a zirconia disc, and up to 10x an aluminum oxide disc.

Type 29 vs. Type 27 — What's the Difference?

Type 27 flap discs sit flat against the work surface. Type 29 discs have an angled (15°) face, which gives better contouring on curves and edges and easier access when grinding welds. We stock Type 29 because it's the more versatile choice for most fabrication work — flat surfacing and edge/weld work with one disc.

Recommended Grinders for This Disc

Two 4-1/2" angle grinders we'd put our name behind:

Makita XAG04Z (Cordless) — ~$120, great if you need to move around the shop without a cord.
Makita 9557PB (Corded) — ~$85, reliable daily driver for weld and stock removal work.

Why Shop Maverick Abrasives

Free shipping on orders over $200 (contiguous USA)
30-day returns on unused product
Family-run — real people who use these products, on the phone Mon-Sat 9am-6pm PST

Frequently Asked Questions

What is a Type 29 flap disc used for?
Type 29 flap discs have an angled 15° face, making them ideal for contouring, edge work, and grinding welds — anywhere you need to work at an angle rather than flat against the surface.

What's the difference between Type 27 and Type 29 flap discs?
Type 27 discs are flat and best for flat-surface grinding. Type 29 discs are angled, giving better access to welds, edges, and contoured surfaces.

What size grinder do I need for this flap disc?
This disc is sized for standard 4-1/2" angle grinders with a 7/8" arbor — the most common size for both corded and cordless grinders.

What grit should I use for grinding welds?
Start with 36 or 40 grit for fast material removal on welds, then step up to 60 or 80 grit to blend and smooth the surface. Use 120 grit for a final light finishing pass.

How long do high density ceramic flap discs last?
Typically 2-3x longer than standard ceramic flap discs, up to 6x longer than zirconia, and up to 10x longer than aluminum oxide flap discs.

Can this flap disc be used on both metal and wood?
Yes. Ceramic flap discs cut fast and stay cool on both metal and wood.

Do you sell these in bulk?
Yes — available as a single disc or a 10-pack for shops that go through discs regularly.

Is there a sample option to try different grits?
Yes, we offer a Sample Kit with one disc each in 36, 60, 80, and 120 grit so you can test which grit fits your work before buying a full pack.

Flap Discs

4-1/2" x 7/8" High Density Ceramic Flap Disc, Type 29 (36-120 Grit)

Ceramic Shredder Flap Discs 4-1⁄2" x 5/8-11" With Hub (Type 29) 5X LIFE!

4-1/2" x 7/8" Surface Conditioning Flap Disc Type 29