Key Features
Overview
Mirka Galaxy 5 in 800 Grit Sanding Discs are hook and loop ceramic sanding discs built for fine surface prep and finish sanding on a 5 inch random orbital sander. This is a sanding disc designed for surface preparation, finish sanding, and material refinement across wood, metal, epoxy, primer, paint, fillers, and composite materials. Model Number: FY-612-800. If you want a fine grit disc that still cuts cleanly instead of just rubbing the surface, this is the kind of abrasive that makes sense.
The big story here is the ceramic grain. On the job, that matters because ceramic abrasives keep exposing fresh sharp edges as they wear. You get more consistent sanding action over the life of the disc, which is especially useful when you are trying to keep a uniform scratch pattern at 800 grit. That is the range where inconsistency shows up quickly in paint prep, epoxy work, and finish sanding.
Mirka also adds an anti-clog coating, and that is not a throwaway feature. Fine grits can load up fast when you are working on paint, primer, fillers, or resin-rich materials. Once a disc loads, cut rate drops and heat goes up. The anti-clog surface helps the abrasive stay productive longer, so you spend less time tossing partially spent discs and more time actually sanding.
The no-hole face is another practical choice. Instead of matching dust holes to the pad every time you change discs, you just stick it on and get back to work. For users who value fast changes and full-face abrasive coverage, that is a real benefit. It also makes these discs broadly useful across many 5 inch hook and loop random orbital sanders, including Mirka machines such as the DEROS 550X CV listed in the source data.
At 5 inches in diameter, these discs fit a very common sander size used in woodworking shops, auto body prep, general finish work, and serious DIY garages. The 800 grit rating puts this pack in the fine finishing category, so it is a good fit when the goal is refining a surface, smoothing between coats, or dialing in prep before the next finishing step. This is not your heavy stock removal disc. It is for when the surface quality matters and the scratch pattern needs to stay controlled.
The pack includes 50 discs, which makes this a practical buy for repeatable shop work rather than occasional one-off sanding. If you go through abrasives regularly, a 50-count box means fewer interruptions and better consistency when you are staying within one grit stage of a process. That matters in automotive refinishing, cabinet work, epoxy projects, and any workflow where moving between grits in a controlled way is part of the job.
Who should buy this? Pros and serious DIY users who already know where 800 grit fits into their finishing process. If you are sanding clear coats, smoothing primers, refining epoxy, or doing fine prep work before the next coat, these Mirka Galaxy discs are a smart fit. If you need aggressive removal, step down to a coarser grit. But if your work depends on a clean, consistent finish stage, this pack is right in the wheelhouse.
Built for Fine Finishing Work
At 800 grit, this disc is meant for refinement, not rough leveling. It helps leave a controlled scratch pattern when you are smoothing a surface before the next finish step.
- 800 grit ultra fine abrasive for finish sanding and surface refinement
- Suitable for wood, metal, epoxy, primer, paint, filler, and composites
Fast Changes, Full Face Coverage
The hook and loop backing makes disc swaps quick, and the no-hole layout means there is no hole pattern to line up. That keeps the workflow simple when you are moving through finishing stages.
- No-hole disc design for full sanding face coverage
- Hook and loop attachment for secure hold and quick disc replacement
Made to Keep Cutting Longer
Fine discs are only useful if they stay open and keep cutting. The ceramic grain and anti-clog coating work together to improve disc life and maintain sanding efficiency on loading-prone materials.
- Self-sharpening ceramic abrasive supports steady cut performance
- Anti-clog coating helps reduce buildup during longer sanding sessions
What’s in the Box
- (50) Mirka Galaxy 5 in sanding discs
- 800 grit
- Hook and loop backing
- No-hole disc format
Key Specifications
| Diameter | 5 in |
|---|---|
| Grit | 800 |
| Piece Count | 50 |
| Abrasive Material | Ceramic |
| Backing Type | Hook and Loop |
| Disc Style | No-Hole |
| Grit Range | Ultra Fine |
| Made In | Finland |
Compatibility
Built For
Pro Tip
With a no-hole 800 grit disc like this, keep a few fresh discs nearby and change them as soon as the cut rate drops. Fine sanding is all about keeping the scratch pattern even, and a loaded disc can dull the finish quality before it looks fully worn out.
Tool Nut’s Take
Mirka Galaxy 5 in 800 Grit Sanding Discs are a smart buy for finish-stage sanding
This is the kind of abrasive you grab when surface quality matters more than brute-force removal.
- Who it’s for: Painters, body techs, woodworkers, epoxy users, and detail-focused DIYers working through fine sanding steps on a 5 inch random orbital sander.
- Why it stands out: Ceramic grain, anti-clog performance, and a no-hole hook and loop format make it easy to use and productive across a wide mix of materials.
- Worth knowing: This is an 800 grit disc, so think refining and prep between finish stages, not heavy stripping or leveling.
Common Questions
- What type of sander do these discs fit? They are designed for 5 inch hook and loop sanders, including 5 inch random orbital sanding machines.
- What materials can these sanding discs be used on? Source data lists wood, metal, epoxy resin, primer, paint, fillers, and composite materials.
- Are these discs perforated for dust holes? No. This is a no-hole disc design.
- What kind of abrasive is used? These discs use ceramic abrasive material.
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