Disc Wheel Blade Grinder Wheel | Bench Grinder Lawn Mower Blade Sharpener | RBG712

What It Is

The Disc Wheel Blade Grinder Wheel (RBG712) is a bench grinder attachment designed to sharpen lawn mower blades, reel mowers, and other cutting tools. It’s a professional-grade abrasive wheel used in a stationary bench grinder to restore a sharp edge quickly and evenly.

Fitment & Compatibility

Before buying, confirm your bench grinder’s arbor size—this wheel typically fits 5/8-inch or 7/8-inch arbors (check product specs for exact size). It’s not mower brand-specific; works with any blade that can be safely held against the wheel. Measure your bench grinder’s shaft diameter and verify the wheel’s maximum RPM rating matches or exceeds your grinder’s speed. Not for use on handheld angle grinders—only stationary bench grinders. No OEM compatibility issues; it’s an aftermarket accessory.

Key Things to Know

• Quality: High-abrasive grit, durable for repeated use; rated 4.6/5 for consistent sharpening results.
• Installation: Easy—mounts like any bench grinder wheel; no special tools needed. Ensure the wheel is properly balanced and the guard is in place.
• Gotchas: Can generate heat; avoid overheating the blade edge (dip in water between passes). Not for sharpening very dull or bent blades—pre-grind them first. Wheel wears over time; replace when flat spots develop.
• Safety: Always use eye protection and a blade holder or jig to maintain correct angle (typically 30–45 degrees).

Should You Buy It

Buy this if you sharpen multiple mower blades regularly and want consistent, fast results from a bench grinder. It’s overkill for occasional home use (one or two blades per season) where a hand file or cheap sharpener suffices. Best for small engine shops or dedicated DIYers with a bench grinder.