Move diamond head back & forth across the grinding or deburring wheel to obtain a smooth flat surface. >>> SUGGESTED USES: Dress and true small to medium size grinding wheels, abrasive wheels or deburring wheels to obtain a flat working surface. Make a great Gift
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After one use (two wheels on my bench grinder) the crystals were 1/3 to 1/2 worn off making this a rather disposable tool. That's fine with me since it's also The wheels' grinding surfaces are like new now, though.
There was a section on the tool's diamond coated surface that was lighter on the diamonds. Also, there was a lump that protruded near the center of the grinding surface. The lump ended up being a benefit. I passed just that point back and fourth over the width of the wheel's grinding surface until the lump wore down to the rest of the diamonds on the tool. I nearly dressed a whole wheel with just the lump.
Overall I highly recommend this at $9.99 if you've only got a few wheels to dress. If you've got a bunch of wheels, I'd buy one of those carbon steel star wheel dressing tools ($20-40) to get a rough dressing, then use this to finish as needed.
TIP: Use a light touch and let the diamonds do the work.
The problem is mine came with a ~1mm lump of metal stuck near one end of the working face. That lump is even coated the same as the rest, so I can't ever let that spot touch or else it'll carve out a groove in my wheels.
This is a nicely made tool, the handle being made in the US and the head part in China.
I held it up to the grinder wheel, 60 grit vitrified aluminum, and BARELY made contact with it and only let it contact for at most a couple of seconds at a time. This was so it would not heat up and the diamonds and the bonding agent would not be under so much stress.
In only a couple of minutes the job was done, really fast, the wheel perfect and all diamonds still on the Commando. Expecting that failure was a real possibility, this was a pleasant surprise.
This is recommended. Of course grinding wheels of other grits and materials might be tougher on this tool.
Also, the working end of the tool is not tight to the handle. The nut inside the square end is as tight as it will go, but the end is floppy, rendering the tool unusable for its intended purpose.