Lawn Mower Blade Sharpener and Balancer Kit for Many Types of Mower Blade.(15°-45° Adjustable,High Precision Magnetic Blade Balancer) Replace 5005 42-047 339075B

What It Is

This is a combined lawn mower blade sharpener and balancer kit that works with most standard mower blades, from walk-behinds to zero-turns. The sharpener adjusts from 15° to 45° for different blade bevels, and the magnetic balancer ensures even weight distribution after sharpening.

Fitment & Compatibility

• Blade types: Fits standard straight, mulching, and gator blades with a center hole or slot. Not for blades with deep curves or welded-on serrations that block the sharpening guide.
• Deck sizes: Works with blades from 14" to 22" long (typical for 21" to 54" decks). Measure your blade’s length and center hole diameter (usually 5/8" or 7/8") before buying.
• OEM vs aftermarket: Replaces part numbers 5005, 42-047, and 339075B, but these are generic reference numbers—verify your blade’s mounting hole pattern matches the sharpener’s guide.
• What to check: Ensure the blade is not bent or excessively worn (cracks or chips). The balancer requires a flat, clean surface to read accurately.

Key Things to Know

• Quality: The sharpener’s adjustable angle guide is plastic but holds up for home-use sharpening—expect 10-15 sharpenings per blade before replacement. The magnetic balancer is strong but can be thrown off by debris on the blade.
• Installation difficulty: Easy—clamp the sharpener to a workbench, run the blade through the guide, then place on the balancer. No power tools needed, but a vise or clamp is helpful.
• Gotchas: The sharpener works best on blades with a flat back edge; curved blades may require manual adjustment. The balancer’s magnet may not hold heavy commercial blades (over 2 lbs) securely.
• Storage: The kit is compact but the sharpener’s abrasive stone wears down—buy a replacement stone separately if you sharpen frequently.

Should You Buy It

If you sharpen blades 2-4 times per season on a standard residential mower, this kit saves time over filing and avoids the cost of a bench grinder. It’s not for high-volume shops or blades over 22" long, but for DIY maintenance, it’s a solid, affordable setup.