Thread Dimensions: M54 x 2.0
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    Question Thread Dimensions: M54 x 2.0

    Hello,

    I am in the process of reverse engineering a part and will need to machine a M54x2.0 external thread but I can not find any dimensions in terms of major, minor, or even pitch diameter. I have seen taps and go/no go gauges online so I know this thread exists but I haven't been able to find any information about it in my bible or browsing online. Does anyone have any information about this thread?

    Thanks!

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    Seriously?

    Metric Thread Calculator

    A quick google of "calculating metric thread dimensions" returns multiple calculators...

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    Well that's pretty embarrassing... I didn't even think about looking for a calculator. Thanks.

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    ThreadPal - dimensions and tolerances for inch and metric screw threads

    The best $80 you'll ever spend when it comes to dealing with almost any thread you will ever encounter.

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    Quote Originally Posted by tmcgh View Post
    Hello,

    I am in the process of reverse engineering a part and will need to machine a M54x2.0 external thread but I can not find any dimensions in terms of major, minor, or even pitch diameter. I have seen taps and go/no go gauges online so I know this thread exists but I haven't been able to find any information about it in my bible or browsing online. Does anyone have any information about this thread?

    Thanks!
    how about taking the dimensions of a standard m16 and adding 38?

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    I don't know what your "bible" is, but Machinery Handbook has specs for metric pitches, by pitch. A 2mm pitch is around the middle of the list so it is neither the largest nor the smallest and far from both.

    You have the OD, 54mm so all you really need to do is apply the 2mm thread pitch to that number, using the drawings in MH and you should have it all, including target values, allowances, and tolerances.

    It is all there. It does take a bit of study.

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    Quote Originally Posted by janvanruth View Post
    how about taking the dimensions of a standard m16 and adding 38?
    That would work and/but (?) you'd be making a better thread than necessary.

    x2.jpg

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    Quote Originally Posted by EPAIII View Post
    I don't know what your "bible" is, but Machinery Handbook has specs for metric pitches, by pitch. A 2mm pitch is around the middle of the list so it is neither the largest nor the smallest and far from both.

    You have the OD, 54mm so all you really need to do is apply the 2mm thread pitch to that number, using the drawings in MH and you should have it all, including target values, allowances, and tolerances.

    It is all there. It does take a bit of study.
    MH is good but "doesn't have it all".

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    I have found this calculator useful as it allows the thread class to be put in.
    Metric screw thread: M Profile calculator

    just put in you diameter, pitch and tolerance


    Still I think owning a Machinery Handbook is good . they are 30 bucks or so in ebay.

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    Quote Originally Posted by michiganbuck View Post
    I have found this calculator useful as it allows the thread class to be put in.
    Metric screw thread: M Profile calculator

    just put in you diameter, pitch and tolerance

    Still I think owning a Machinery Handbook is good . they are 30 bucks or so in ebay.
    Interesting link. I wonder how much more will be added over time? I see there's more than "just" threads. As I have ThreadPal I'll stick to that for my thread info but now have "yours" as an ikon on my computer

    Again, I'd use MH the same way I'd use a phone book. Helps me in the right direction but as far as thread info goes then it very rarely has all I need.

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    I just noticed the calculator I posted in post 9 does not give the crest or root flat or radius.
    also does not give over wires information for metric threads.

    So very lacking with those missing.

    but for Imperial threads the information is given.

    Agree most seasoned machinist know the figuring but it seems the calculator should post the numbers or the math.

    Pretty sure ThreadPal has this information..

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    well, neither the wire nor the shape stuff seem to work.

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    Quote Originally Posted by dian View Post
    well, neither the wire nor the shape stuff seem to work.
    Shape stuff should include that the 60* has to be on a 90* axis or all the checking is of little good.

    That is where the fish gauge sets a too bit square (90*)to the part.


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