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Craftsman variable speed bench grinder won't adjust speed

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Old 01-03-2014, 09:23 AM
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I have a gauge for that
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Default Craftsman variable speed bench grinder won't adjust speed

I was given this grinder a couple christmases ago, havent really ever used it until recently. Craftsman Variable Speed 8 Bench Grinder: Power Up With DealsSears

The variable speed **** doesnt do anything, the the unit appears to run at full speed all the time. It worked the first couple of times I used the unit but hasnt since. Thing maybe has 20 minutes of run time on it.

I took the **** off the shaft and turned the shaft by hand to make sure the **** wasnt just slipping on the shaft and it still feels normal so I am out of ideas short of taking it apart and tinkering with it.
Old 01-03-2014, 09:47 AM
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VFD is probably bad or the controller in the motor
Old 01-05-2014, 01:10 PM
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I'm sure it's just a potentiometer that controls the speed... Pick one up from radio shack and wire it in and see!!!
Old 01-06-2014, 08:38 AM
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I have a gauge for that
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I pulled it apart and tested the resistance of the leads of the ****, 10.2kohms at low and 9.8 at high....that doesnt seem quite right.
Old 01-07-2014, 06:28 PM
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No it doesn't, seems like there should be more of a range than that.
Old 01-07-2014, 07:16 PM
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Your thread title= oxymoron.

Similar story , I got a nice ( I thought) craftsman timing light for Christmas 3 years ago , needed it this past summer , it didn't work , tried it on another vehicle , no dice . Wayyy too late to take it back . FML
Old 01-07-2014, 07:17 PM
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it's a craftman. take it to sears and get a new one.
Old 01-07-2014, 09:46 PM
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Originally Posted by TXsilverado
it's a craftman. take it to sears and get a new one.
thats only for handtools. most power tools have a 1 year warranty and you need a receipt.
Old 01-07-2014, 10:16 PM
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throw a mini **** fit and sears will cave every time.
Old 01-11-2014, 09:08 PM
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Buy new one, take old one back and say it doesn't work. You get a new one and no problems.


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