Mirka
Mirka Ceramic Alumina Fiber Disc 5" P50 63-578-050
Ceramic alumina fiber disc for aggressive material removal in metalworking applications
- Ceramic alumina grains cut faster on hard metals
- 5-inch diameter fits standard angle-grinder back-up pads
- P50 grit removes heavy stock in fewer passes
- Fibre backing resists tearing under high pressure
- First listed by manufacturer in June 2022
Ceramic Alumina Fiber Disc 5" P50
This five-inch ceramic alumina fiber disc carries a P50 grit rating for aggressive material removal. It is built for professionals who need a fast-cutting abrasive on metal fabrication, weld blending or heavy stock removal tasks. The ceramic grain structure maintains sharpness longer than conventional aluminium oxide alternatives.
Upgrading from standard aluminium oxide
Switching to this ceramic alumina disc makes sense when standard discs dull too quickly on hard alloys or high-pressure grinding. The self-sharpening ceramic grain reduces disc changes and keeps cut rates consistent through the job. The jump is worth it when downtime for abrasive changes outweighs the higher per-disc cost.
Suited for high-production metal shops
This disc fits angle grinders and right-angle sanders used in structural steel, shipyard or pipeline work where throughput matters. It is not ideal for finish sanding, fine surface preparation or composite materials where a finer grit or softer bond would prevent gouging. Buyers who need extended life on stainless steel without contamination should verify compatibility before purchase.
Highlights
- Ceramic alumina grains cut faster on hard metals
- 5-inch diameter fits standard angle-grinder back-up pads
- P50 grit removes heavy stock in fewer passes
- Fibre backing resists tearing under high pressure
- First listed by manufacturer in June 2022
Specifications
| Brand | MIRKA |
|---|
Questions about this item
What backing-pad diameter does the 5" disc require?
The disc is 5 inches in diameter, so it must be paired with a 5-inch backing pad that matches the tool's spindle.
How is the disc attached to the tool, and what step is often missed?
Mount the disc on the 5-inch backing pad, centre it carefully, and tighten the retaining nut to the tool maker's torque value — skipping the torque check is the common error.
When should the P50 ceramic alumina disc be replaced?
Replace it once the ceramic grains dull or the fibre backing shows fraying, which typically occurs after heavy stock-removal sessions.
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