Mirka 5inch Finishing Sander 8mm Orbit MR-508

Mirka MR-508 – 5" Finishing Sander, 8mm Orbit

The Mirka MR-508 is a 5" random orbital sander with an 8mm orbit – the largest orbit in the MR series – designed for applications where fast material removal takes priority over ultra-fine finishing. Built in Finland, it is most effective at coarser to mid-range grits for preparation work, leveling, and surface conditioning before transitioning to finer-orbit tools for final passes.

Why Choose the MR-508?

• 8mm orbit – Aggressive orbit for rapid stock removal and leveling at coarser grits.
• 5" pad – Standard format compatible with the full Mirka 5" disc range.
• Finnish precision engineering – Consistent orbit performance and durable construction.
• Best for preparation sequences – Ideal for 60–120 grit stock removal and surface conditioning.
• Pairs well with finer-orbit models – Use MR-508 for prep, then follow with MR-525 or similar for finishing.

Ideal Applications

• Aggressive stock removal on wood panels and solid lumber
• Leveling and surface preparation before finish sanding
• Removing mill marks and machine marks on flat surfaces
• Automotive body filler leveling and primer surfacing

Specifications

Ordering & Delivery

In stock and ready to ship. Orders typically leave our warehouse the next business day. We charge shipping at cost with discounts as your order grows: 25% off shipping at $200+, 50% off at $300+, 75% off at $400+, and free shipping on orders over $500.