Mirka Coarse Cut 6-in. P40 Hook and Loop Sanding Disc Pack of 25 (40-622-040)

Mirka 40-622-040 Coarse Cut Grip Disc is a 6-inch hook and loop sanding disc built for aggressive material removal. This is a sanding disc designed for coarse sanding on fillers, lacquer, glass reinforced polyester, and welding seams. Model Number: 40-622-040. If your job starts with knocking material down fast instead of chasing a fine finish, this is the right kind of abrasive.

The big story here is the P40 grit. That coarse cut gives you the bite needed for early-stage sanding, where speed matters more than surface finish. It is a practical choice for shaping body filler, removing heavy coatings, and flattening rough areas before stepping through finer grits. Mirka also calls out minimal clogging, which matters when you are sanding materials that can load up a disc and kill cut speed early.

Mirka pairs that aggressive grit with aluminum oxide abrasive and a semi-open coat construction. In plain terms, that means you get a durable abrasive surface that is made to keep cutting in demanding prep work. The special reinforced F-weight paper backing is there for a reason too: coarse sanding puts more stress on the disc, especially around edges and curves, and stronger backing helps the disc hold together under that abuse.

This disc uses a grip attachment, which is the hook and loop style most users want for random orbit sanders and similar setups because disc swaps are fast. When you are moving from heavy stock removal to surface prep, that quick change saves time and keeps you working instead of peeling adhesives or fighting with worn-out discs. The no-hole design is best suited to setups that do not require vacuum hole alignment in the disc.

Mirka describes the Coarse Cut series as a durable product for all kinds of coarse sanding, with strong edge wear resistance. That matters when you are working around contours, edges, or metal transitions where weaker discs can tear and leave deeper, uneven scratch patterns. A tougher edge helps the abrasive stay consistent longer, which means fewer disc changes and more predictable prep work.

The 6-inch diameter fits a common sander size used in automotive, metalworking, and general surface prep. This size gives you a good balance between coverage and control. It is large enough to move across panels or broad surfaces efficiently, but still manageable for more targeted sanding when you need to stay on a repair area or seam.

Who is this for? Pros and serious DIY users doing bodywork, weld cleanup, filler shaping, coating removal, and rough surface prep. If you are looking for a finish-ready disc, this is not that. If you need a coarse sanding disc that gets through the ugly first stage quickly and holds up better doing it, this Mirka disc makes more sense.

Mirka 40-622-040 Coarse Cut Grip Disc is for the ugly first step

If your sanding job starts with leveling, stripping, or knocking down rough material fast, this is the kind of disc you want on the machine.

• Who it’s for: Auto body techs, metal fabricators, and anyone doing aggressive prep before moving to finer grits.
• Why it stands out: The P40 cut, reinforced paper backing, and aluminum oxide abrasive are aimed at hard use, not light finish sanding.
• Worth knowing: This is a no-hole 6-inch grip disc, so make sure your sander setup matches that format before you order.

• What grit is this disc? It is a P40 coarse grit disc for aggressive sanding and material removal.
• What size sander is it for? It is a 6-inch disc designed for sanders or pads that accept 6-inch grip or hook and loop abrasives.
• Does this disc have vacuum holes? No. It uses a no-hole design.
• What abrasive material does it use? It uses aluminum oxide abrasive on reinforced F-weight paper backing.