Reel Lawn Mower Sharpening Kit - SK-1 Manual Lawn Mower Blade Sharpener - Precision Sharpening Crank Tool for American Lawn Mower, Great States, Earthwise, Easy-to-Use & Durable Design

What It Is

The SK-1 is a manual sharpening tool designed specifically for reel (cylinder) mower blades. It mounts onto the reel shaft and uses a crank-driven abrasive stone to hone the cutting edge without removing the blade, ideal for homeowners maintaining push-reel mowers.

Fitment & Compatibility

• Reel diameter: Works on reel diameters from 6 to 12 inches (most common for 14-20 inch cut mowers).
• Shaft size: Fits reel shafts with a 5/16-inch hex or round end (check your mower’s axle—some older models use square shafts).
• Brands: Directly compatible with American Lawn Mower, Great States, and Earthwise reel mowers. May work on other brands (e.g., Scotts, Fiskars) if the shaft end matches.
• OEM vs aftermarket: This is an OEM part from American Lawn Mower; no adapter needed for their models. For non-OEM mowers, verify shaft shape and reel diameter before purchase.
• Measurement: Confirm your reel’s shaft end is exposed (not covered by a gearbox) and has at least 1/2 inch of clearance for the tool’s mounting bracket.

Key Things to Know

• Quality: The abrasive stone is adequate for light-to-moderate sharpening but wears quickly with heavy use (expect 10-15 sharpenings before replacement).
• Installation difficulty: Very easy—clamp the tool to the reel shaft, apply a few drops of oil, and crank 20-30 rotations. No disassembly required.
• Common gotcha: The tool only sharpens the reel’s front edge, not the bed knife. For a true edge, you’ll still need to lap the bed knife or use a separate file.
• Durability: Plastic mounting bracket can crack if overtightened; hand-tighten only.

Should You Buy It

If you own a compatible reel mower (American, Great States, or Earthwise) and want a quick, no-mess way to restore cutting performance between professional sharpenings, this kit is a solid $15 investment. It won’t replace a full lapping service, but for a typical homeowner cutting a small lawn once a week, it’ll keep your reel mower slicing cleanly for several seasons. Skip it if you have a heavy-duty commercial reel mower or need to sharpen the bed knife.