What Grit Flap Disc is Best For Sharpening Mower Blades?

The grit you choose will depend on the type of metal you are working with and the level of finish you desire.

For most applications, a 40-grit disc will be sufficient. If you are working with stainless steel or aluminum, you may want to use a finer grit, such as 60 or 80.

For a high-gloss finish, use a disc with 100 grit or higher.

But when you’re a lawn mower user, the choice of grit will also affect how well the lawn mower works.

Learn here what grit flap disc for lawn mower blades suits your needs and how you can sharpen them.

Can You Use a Flap Disc To Sharpen Mower Blades?

Yes, you can use a flap disc to sharpen your lawn mower blades. Now, what grit to sharpen your mower blades?

There are several types of grits available. Such as below;

  • For Metal Removal 36 to 40
  • For Edging & Chamfering 36 to 60
  • Heavy Blending 40 to 60
  • Deflashing & Deburring 60 to 80
  • Cleaning & Finishing 80-120

To sharpen lawn mower blades, we recommend using a 36 or 40-grit flap disc. This will help remove any burrs or debris from the blade and provide a sharp, clean edge. You can use 60 grit and above for an excellent finish, but the discs will wear out faster.

How to Sharpen Mower Blades With Flap Discs?

If your lawn mower blades are dull, you can use a flap disc to sharpen mower blades. The process is relatively simple and only takes a few minutes. Here’s what you need to do:

  1. Remove the mower blade from the mower deck. Most mowers have a bolt or nut that holds the blade in place. Use a wrench or socket to remove it.
  2. Clean the blade with a wire brush or sandpaper to remove any dirt or debris.
  3. Attach the flap disc to your angle grinder. Make sure the disc is rated for use with metal.
  4. Hold the angle grinder against the blade’s edge and start it up. Slowly move the grinder along the length of the blade.
  5. Repeat steps 4 until the entire blade is sharpened.
  6. Reattach the blade to the mower deck, and you’re done!

If you are having trouble sharpening your blades or are not getting the desired results, we recommend taking the blade to a professional for help.

Frequently Asked Questions

What Is the Difference Between a Flap Disc and a Grinding Disc?

There are several key differences between flap discs and grinding discs. First, flap discs are made with overlapping abrasive flaps that wear away as the disc is used. This exposes fresh abrasive material, which prolongs the life of the disc. Grinding discs have a solid construction without flaps, so they wear down more quickly.

Can Flap Disc Remove Rust From a Lawn Mower?

Yes, a flap disc can be used to remove rust from a lawn mower.

Are Flap Discs More Durable Than Grinding Discs?

Yes, flap discs are generally more durable than grinding discs because they have a design that allows them to expose fresh abrasive material as they wear down.

Final Words

So, what grit flap disc for a lawn mower blade is the best option for you? It depends on your needs and preferences.

A higher-grit disc may be the way to go if you value speed and convenience. A lower-grit disc may be better suited for your needs if you’re more concerned with getting a perfect finish.

Either way, do your research and choose the option that’s right for you. Thanks for reading!

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