How do you put a flap disk on an angle grinder?

Release Date:2023-04-12 10:44
Flap discs are versatile abrasive tools used for grinding, blending, and finishing different types of surfaces. They are commonly used on angle grinders, which are handheld power tools with rotating abrasive discs. If you are new to using flap discs, you may be wondering how to put one on an angle grinder. In this article, we will guide you on how to do just that.

Step 1: Gather Your Materials

To begin, you will need to gather your materials. You will need an angle grinder, a flap disc, and a wrench. Make sure that you have the correct size flap disc and wrench for your angle grinder.

Step 2: Turn Off the Angle Grinder

Before you start, make sure that your angle grinder is turned off and unplugged from the power source. This will help to ensure that you do not accidentally turn on the grinder while you are changing the flap disc.

Step 3: Remove the Old Flap Disc

Using the wrench, loosen the nut that is holding the old flap disc in place. You may need to hold the flap disc in place with your other hand to prevent it from rotating while you loosen the nut. Once the nut is loose, remove the old flap disc and set it aside.

Step 4: Install the New Flap Disc

Take the new flap disc and place it onto the spindle of the angle grinder. Make sure that the disc is centered and snugly fits onto the spindle. Tighten the nut by turning it clockwise with the wrench. You may need to hold the flap disc in place with your other hand while you tighten the nut.

Step 5: Check the Tightness of the Flap Disc

After tightening the nut, check the tightness of the flap disc by gently trying to move it back and forth. It should not move or wobble. If it does, you will need to tighten the nut further.

Step 6: Test the Flap Disc

Finally, turn on the angle grinder and test the new flap disc to ensure that it is working properly. Hold the grinder securely and move it back and forth across the surface you want to grind or finish.


Putting a flap disc on an angle grinder is a simple process that can be completed in just a few steps. By following these instructions, you will be able to replace your old flap disc with a new one in no time. Just remember to always wear the appropriate safety gear when using power tools, including safety glasses, gloves, and a dust mask.
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