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  1. 21st Dec 2022, 05:54 PM #1
    SurfinNev
    SurfinNev is offline Most Valued Member
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    Default Another maths question

    Three hole M8 mounting on a PCD of 142mm. What is the distance between the centre of one hole if you draw a line through the centre of the other two holes?

    Hope that makes sense. With rough measurements I get 107mm.
    Nev.
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  2. 21st Dec 2022, 06:19 PM #2
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    kafie1980
    kafie1980 is online now Diamond Member
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    Easy to do in CAD but I am several hours from a computer at the moment.
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  3. 21st Dec 2022, 06:26 PM #3
    SurfinNev
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    I got my measurement by screwing three 8mm bolts into the holes, them placing a straight edge against the inside of two of the bolts and measuring from the outside of the third bolt, to the outside of the straight edge. Probably good enough, but want it as close to perfect as I can get.
    Nev.
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  4. 21st Dec 2022, 06:40 PM #4
    SurfinNev
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    Would also like the centre to centre distance between two holes. I get roughly 123mm.
    Nev.
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  5. 21st Dec 2022, 06:54 PM #5
    Salv
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    Default Another maths question

    Quote Originally Posted by SurfinNev View Post
    Would also like the centre to centre distance between two holes. I get roughly 123mm.
    Close enough to 122.9756 mm
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  6. 21st Dec 2022, 07:52 PM #6
    Michael G
    Michael G is online now Philomath in training
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    Screenshot 2022-12-21 192050.jpg
    Michael
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  7. 21st Dec 2022, 08:15 PM #7
    SurfinNev
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    Thank you to all.
    Nev.
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  8. 21st Dec 2022, 09:24 PM #8
    KBs PensNmore
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    Default

    Hi Nev, should you ever need something like this again, there is a posting at the bottom of the Forum with practically everything that you'll ever need, just a matter of searching through the listing.
    Have put a link to it below. I use it VERY often.

    https://metalworkforums.com/f218/t20...or-practically
    Hope this helps with future mathematical questyuns.
    Kryn
    To grow old is mandatory, growing up is optional.
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  9. 23rd Dec 2022, 09:55 PM #9
    SurfinNev
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    Found some good info when working with PCDs here -

    https://learnmoredeeply.com/what-is-...adjacent-holes
    Nev.
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  10. 24th Dec 2022, 11:32 AM #10
    Sparksy
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    Went through all this when sorting out rims when clearing out fathers house.
    https://www.mwsint.com/site/cms/contentviewarticle.asp?article=661
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