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  #31  
Old 12-02-2019, 03:47 PM
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Also check the runout on the motors shaft, I recall someone bending a shaft fairly easy on a 20" disk sander.
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Originally Posted by toprecycler View Post
Worst case is get a new motor.
kind of figured

Get a block of wood and a hammer and straighten the shaft.
May consider replacing the front bearing after.

The next guy that gets a rag stuck in-between the table and disk will bend the shaft again.
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  #32  
Old 12-02-2019, 04:51 PM
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Plus 1 on the hammer
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  #33  
Old 12-02-2019, 06:45 PM
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Quote:
Originally Posted by GWIZ View Post
kind of figured



Get a block of wood and a hammer and straighten the shaft.

May consider replacing the front bearing after.



The next guy that gets a rag stuck in-between the table and disk will bend the shaft again.


Now you have me thinking another way. Hmmm


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  #34  
Old 12-03-2019, 12:16 PM
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Thank you Gwhiz and Digr! I took your suggestions and took a hammer to it first today. I mounted the disc first though and then clamped a piece of 1/2x 4 CR Flat plate to face of disc to beat on though. Wanted to use the leverage of the plate to help bend the motor shaft.

Before I started, I had .076” runout. I got it to within .014” and called it good. But, then I realized that I had the plate cut untrue, one side was .040” thicker than other side and the heavy side rotated to the bottom quickly.

I then remounted the disc in the lathe in the four jaw chuck on the outside face, and taking care to indicate it in as close as I could, I took a trueing cut on the back side of the plate. With the jaws holding the outside, I had very little chatter/ vibration and was able to get plate tried up in about 30 minutes this time.

Put everything back together, and reset the table square to the disc and put old sanding disc back on, and called it a win. No more hand massage with the vibration now when using.


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  #35  
Old 12-03-2019, 08:21 PM
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Pics of the plate I c-clamped and hit against. Will try to add video of dial indicator later.Click image for larger version

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Last edited by toprecycler; 12-03-2019 at 08:28 PM.
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  #36  
Old 12-04-2019, 02:40 AM
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Now let us see if anyone notices their hands not tingling as much . At least enough to say thanks.
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