Mirka Galaxy 6-in. 80 Grit PSA Sanding Disc Linkroll, 100-Pack (FY-6PF-080)

The Mirka GALAXY 6" PSA Linkroll with liner, model FY-6PF-080, is a 6 inch pressure-sensitive adhesive sanding disc roll built for stock removal and surface prep on wood, metal, epoxy resin, and other shop materials. This is a sanding disc designed for machine sanding and surface preparation. In this 80 grit version, it is aimed at users who need an aggressive cut for leveling, stripping, and early-stage sanding without giving up disc life.

What makes the Galaxy line worth a look is the ceramic grain. Mirka uses self-sharpening ceramic abrasive that keeps exposing fresh cutting edges as the disc wears. In plain terms, that means the abrasive keeps cutting instead of skating over the surface once the top layer starts to break down. If you are sanding hardwood, metal, filler, primer, or epoxy resin, that matters because a disc that stays sharp removes material faster and gives you more usable work out of every disc.

This particular format is a 6 inch PSA linkroll with liner. PSA means pressure-sensitive adhesive, so the disc sticks directly to a compatible sanding pad. That setup is popular with users who want a firm hold and clean disc changes. The no-hole configuration is a straightforward choice for applications where a solid face is preferred or where the sanding setup does not rely on a dust-hole pattern. The roll format also keeps discs organized and easy to grab at the bench or on the job.

Mirka also built Galaxy with a dust-repellent coating for better clog resistance. That is a practical feature, not fluff. When abrasive dust loads into the face of a disc, cutting speed drops and finish quality gets inconsistent. A coating that sheds dust better helps the disc stay effective longer, especially on materials that tend to gum up ordinary abrasives. For shops doing repeated prep work, that means fewer disc changes and more even results across the job.

The 80 grit rating puts this abrasive on the coarse end of the lineup. It is the right choice when the goal is removal, leveling, and shaping, not final finish work. Use it for knocking down high spots, removing material quickly, flattening epoxy surfaces, or getting wood and metal ready for the next grit. If you are trying to jump straight to finish sanding with 80 grit, this is not the disc for that. If you need a strong first step that cuts with authority, it is exactly where you start.

Material range is another strong point here. Source data calls out performance on both soft and hard materials, along with vehicle manufacturing, collision repair, marine production, and wood applications. That kind of range is useful if your shop works across multiple substrates and you do not want a different abrasive line for every task. One disc family that can handle wood, metal, and resin work simplifies inventory and makes grit progression easier.

For buyers comparing sanding discs, the real selling point is the balance of cut speed, disc life, and reduced loading. Plenty of abrasives cut well for a short time. Plenty last a while but slow down. The Galaxy line is built to hold onto cutting performance longer, which is what actually saves time on the sander. That matters to body shops, marine shops, cabinet builders, and serious DIY users who burn through discs and notice quickly when an abrasive stops earning its keep.

If you use a 6 inch PSA sander or sanding pad and want an aggressive ceramic abrasive for prep work, the Mirka GALAXY 6" PSA Linkroll with liner is a smart fit. It is best for users who care more about steady cutting, cleaner sanding, and disc life than buying the cheapest paper on the shelf.

Mirka GALAXY 6" PSA Linkroll with liner is the kind of abrasive that earns its spot

If you go through sanding discs every week, this is the kind of ceramic abrasive that makes sense because it keeps cutting and resists loading instead of quitting early.

• Who it's for: Body shops, marine shops, woodworkers, and serious DIY users running 6 inch PSA sanders for prep and material removal.
• Why it stands out: The self-sharpening ceramic grain and dust-repellent coating are the big story here. That combination gives you a fast cut with better usable life.
• Worth knowing: This is 80 grit, so it is a coarse working disc. Great for removal and leveling, not your final finish step.

• What kind of abrasive is this? It uses ceramic alumina abrasive with self-sharpening grain technology.
• What backing does this disc use? This is a PSA disc, which means it uses a pressure-sensitive adhesive backing for stick-on attachment to a compatible pad.
• What size is the disc? Each disc is 6 inches in diameter.
• What materials can it be used on? Source data lists wood, metal, epoxy resin, and both soft and hard materials as suitable applications.
• How many discs are in the roll? This linkroll includes 100 discs.