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  1. #1
    Junior Member Buracho's Avatar
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    Backing plate stud height and diameter for 5/16" thread.

    Hello everyone! As the title says am looking for measurements of the stud that is sticking out of the backing plate. Particularly the height and width (diameter).
    I know the pitch of thread is 5/16" which the PC and most DA use.
    I am not looking for a backing plate btw. I just want the specs on the stud which I couldn't find anywhere.

    Anyone has this info available?

    Thanks in advance!

    Brook.

  2. #2
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    Re: Backing plate stud height and diameter for 5/16" thread.

    Quote Originally Posted by Buracho View Post
    I know the pitch of thread is 5/16" which the PC and most DA use.
    I am not looking for a backing plate btw. I just want the specs on the stud which I couldn't find anywhere.

    Anyone has this info available?

    Thanks in advance!

    Brook.
    It's a 5/16"-8 UNC threaded stud.
    Not sure on the length off the top of my head, and I don't have one in front of me to measure. I'm sure somebody else can measure the stud length for you.

  3. #3
    Mike Phillips
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    Re: Backing plate stud height and diameter for 5/16" thread.

    Quote Originally Posted by Buracho View Post
    Hello everyone! As the title says am looking for measurements of the stud that is sticking out of the backing plate. Particularly the height and width (diameter).
    I know the pitch of thread is 5/16" which the PC and most DA use.
    I am not looking for a backing plate btw. I just want the specs on the stud which I couldn't find anywhere.

    Anyone has this info available?

    Thanks in advance!

    Brook.

    It's 5/16" coarse thread.

    Not sure what else you could "need" to know in order to attach one to a tool and buff out a car.


    The length is arbitrary because ANY company manufacturing a backing plate has already done their homework and figured out how long the stud needs to be in order to attach to the spindle for acceptable performance.



  4. #4
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    Re: Backing plate stud height and diameter for 5/16" thread.

    Mike, I'm thinking it is a coarse thread too, but I was just looking at the buffdaddy site, and according to his site, it's a 5/16-24 thread......

    If his site is correct, that would be a fine thread, and we'd be wrong...

    I'm not with my detailing supplies, so I can't check for sure.

  5. #5
    Junior Member Buracho's Avatar
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    Re: Backing plate stud height and diameter for 5/16" thread.

    Quote Originally Posted by mengelhardt View Post
    It's a 5/16"-8 UNC threaded stud.
    Not sure on the length off the top of my head, and I don't have one in front of me to measure. I'm sure somebody else can measure the stud length for you.
    Thanks for the reply mengelhardt. Yes thats the exact measurement ive found so far. appreciate it.

  6. #6
    Junior Member Buracho's Avatar
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    Re: Backing plate stud height and diameter for 5/16" thread.

    Quote Originally Posted by Mike Phillips View Post
    It's 5/16" coarse thread.

    Not sure what else you could "need" to know in order to attach one to a tool and buff out a car.


    The length is arbitrary because ANY company manufacturing a backing plate has already done their homework and figured out how long the stud needs to be in order to attach to the spindle for acceptable performance.


    Thank you for your input Mike!

    I have little project i am working and thats why i needed the exact or close approximate height of the stud.
    I hope to share it here if it ia a success.
    Can you help me out?

  7. #7
    Junior Member Buracho's Avatar
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    Re: Backing plate stud height and diameter for 5/16" thread.

    I have found both fine and course threads from different sources now. 5/16" 18 and 5/16" 24.

  8. #8
    Super Member Rsurfer's Avatar
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    Re: Backing plate stud height and diameter for 5/16" thread.

    Quote Originally Posted by Buracho View Post
    I have found both fine and course threads from different sources now. 5/16" 18 and 5/16" 24.
    Either or, it can't be both. Sorry I'm not home so I can't measure the length for you.

  9. #9
    Junior Member Buracho's Avatar
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    Re: Backing plate stud height and diameter for 5/16" thread.

    Quote Originally Posted by Rsurfer View Post
    Either or, it can't be both. Sorry I'm not home so I can't measure the length for you.
    NP Thanks for the reply, yes i agree it cant be both.

  10. #10
    Super Member FUNX650's Avatar
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    Re: Backing plate stud height and diameter for 5/16" thread.

    Quote Originally Posted by Buracho View Post
    the PC...
    Quote Originally Posted by Buracho View Post
    I have found both fine and course threads from different sources now. 5/16" 18 and 5/16" 24.
    Porter Cable Product Details for 6" Variable-Speed Random Orbit Polisher - Model # 7424XP


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