How to Change the Disc on a Makita Hand Grinder

The Makita company manufacturers a popular handheld grinder. By using different styles of discs, the grinder can be used as a grinder, cutter, sander or polisher. Changing the discs on the grinder is a relatively basic process. The grinder comes with a lock nut wrench that is used to loosen or tighten the lock nut that holds the grinding disc in place. A shaft lock button located on the top of the grinder is depressed to prevent the shaft from spinning during the process of removing and replacing the discs.

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A Makita grinder is a versatile tool that can be used for sanding, grinding, cutting and polishing.

Removing the Disc

Step 1

With the grinder unplugged, turn the grinder upside down so that you are looking at the grinding wheel and the locking apparatus.

Step 2

Depress the shaft lock button located on the top of the grinder. Because the grinder is being held upside down, this button will be facing down towards the ground.

Step 3

Rotate the disc until the shaft locks in place and no longer spins.

Step 4

Place the lock not wrench onto the lock nut holding the disc in place. Turn the lock nut wrench counter-clockwise to loosen the lock nut.

Step 5

Remove the lock nut, the old disc and the inner flange from the grinder.

Attaching a New Disc

Step 6

Nest the inner flange against the underside of the new disc. Set the inner flange and disc onto the grinder's shaft.

Step 7

Place the lock nut on the grinder's shaft and hand-tighten it.

Step 8

Depress the shaft lock button and spin the shaft until it locks into place.

Step 9

Use your lock nut wrench to tighten the lock nut onto the grinder shaft and disc. Turn the lock nut wrench clockwise until the disc is secured.