When to change a grinding wheel?


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Thread: When to change a grinding wheel?

  1. #1
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    Default When to change a grinding wheel?

    I've been searching for an answer to this question for a little while, and have found no clear results.

    Before I get to the question at hand, I need to provide the appropriate background information.

    At the shop I work in, we have three grinders using either aluminum oxide or ceramic blend wheels. Two of these are automatic surface grinders and the other is a CNC OD grinder. The two surface grinders have a fixed wheel speed, the CNC grinder will adjust its wheel speed to compensate for wheel diameter.

    So now for the question. When is a grinding wheel spent? When is it time to change the grinding wheel? I am talking about changing the wheel because it is worn out as opposed to replacing it with a different style of wheel for a different application.

    In my mind, with the types of wheels I described, I would do the following.

    One the fixed wheel speed surface grinders, I would determine at what diameter the wheel begins to exhibit problems with obtaining the proper finish, burning, loading, etc..
    On the CNC, with adjustable wheel speed, I would change this wheel once the maximum recommended wheel speed is reached.

    Am I way off here? If so please let me know. I appreciate the help.

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  2. #2
    Community Moderator Jim Dawson's Avatar
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    Default Re: When to change a grinding wheel?

    It sounds like you're doing it correctly. Pretty much the way I have always done it, as long as the wheel is doing the job why change it.



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    Default Re: When to change a grinding wheel?

    The maximum wheel speed is inversely proportional to the square of the diameter. once the diameter is reduced to say, 7 inches instead of 8, you can run it at a factor of (8^2/7^2) faster.

    Biggest problem you might run into is you will need to re-balance the wheel once a significant portion of it has been removed, and that's just due to differences in density, random variation in the wheel.



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    Default Re: When to change a grinding wheel?

    This is very much along the lines of my thinking. I really appreciate the information. If anyone has anything else to add, please feel free.



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When to change a grinding wheel?

When to change a grinding wheel?