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  1. #1
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    What causes backing plate failure

    I was using the Groits Garage 3” tool with 5000 grit sand paper. Plenty of soap and water for lube. Thing just came apart too hot to touch. I realise heat is what caused the failure but there was not much drag with 5000 grit sand paper considering I was using water and soap and keeping things wet.

  2. #2
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    Re: What causes backing plate failure

    Heat, forces and age.

    Take your pick. Two are caused by technique, the other can’t be avoided.

  3. Likes Paul A. liked this post
  4. #3
    Senior Member Paul A.'s Avatar
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    Re: What causes backing plate failure

    I have found torque and excessive heat. I have ripped out quite a few and know it was certainly my fault every time. It happens. I now keep several of each kind in my inventory.

    I know I exert a little too much pressure when trying to coax a little more cut out of a compound every now and then and because of age, it might tear a bit inside. Even though you say you weren't using much pressure it may have had a fatique failure inside a bit.

    I have now adjusted my technique to machine weight ONLY for ALL passes. I let those abrasives and pads work to do what they were intended to do. They don't need any
    coaxing by me.

    What was the brand of BP?

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