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Old 04-29-2010, 02:34 PM   #1
SocketDeviler
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Default When should you replace a grinding wheel?

I have little experience in this area. I have a used 5" wheel that is now 4-1/2". I don't have a grinder but plan on getting one in the future. It looks like a good wheel. Other than obvious damage at what point should a wheel be replaced?
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Old 04-29-2010, 02:44 PM   #2
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Default Re: When should you replace a grinding wheel?

When you cant grind with it anymore because the the metal disc that holds it on keeps hitting the material (basicaly when its about 1.5'' in dia

Or when its chipped or cracked.
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Old 04-29-2010, 03:10 PM   #3
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Default Re: When should you replace a grinding wheel?

Nice. Good to know. I figured the wheel still had some miles on it but just wanted to make sure. Thanks!
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Old 04-29-2010, 03:11 PM   #4
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Default Re: When should you replace a grinding wheel?

Quote:
Originally Posted by SocketDeviler View Post
Nice. Good to know. I figured the wheel still had some miles on it but just wanted to make sure. Thanks!
No problem Thats what we are here for
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Old 04-29-2010, 05:09 PM   #5
TheGrooveking
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Default Re: When should you replace a grinding wheel?

Your cutting/grinding effeciency goes down as the diameter reduces. The SFM (surface feet per minute is greater the further you go out form the rotating axis. So grinding something with a 2" wheel will be only 40% as fast as a 5" diameter wheel.

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Old 04-29-2010, 08:11 PM   #6
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Default Re: When should you replace a grinding wheel?

Good info. Thanks, TheGrooveking.
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Old 04-29-2010, 08:22 PM   #7
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Default Re: When should you replace a grinding wheel?

Trick I learned and have used for the last few years.....

Before I install a new bench top grinder wheel (new, used or just changing back from one off my shelf) I will to the "ring test". I take two screwdrivers, the first driver I hold the wheel with the driver through the grinder wheel hole. With the other screwdriver I tap the wheel....you should hear a clear somewhat high pitched ring. If it sounds like a thud it has a crack....sometimes the cracks are not easily seen. I guess I'm just a little cautious when it comes to things turning at such high RPMs near my hands & body!!
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