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  1. #1
    Join Date
    Jun 2009
    Location
    West Aust
    Posts
    5

    Default Imperial and Metric Bolt Thread and Torque Chart

    Hi all
    This is a printable double sided Bolt Drill Thread Chart for the workshop. Laminate it.
    The torques are based on standard bolt tensions for reusing bolts.

    Important for the THREAD PITCH INDICATOR on the side.
    If you print the chart measure the 1mm thread form with an accurate rule to make sure the printer is not distorting the thread pitch forms.
    Use the peak of the bolt to the peak of the thread forms to identify bolt threads pitch. (It is not a thread gauge so don't try to use like a thread gauge)


    TAPPING DRILL & Torque Con Chart.pdf

    Regards moorebrm

  2. #2
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    Hi Barry,
    Welcome to the The Metalwork Forums
    and thank you for posting the chart. I am sure many will take advantage of it.

    Don't be shy tell us about your metalwork interests are and how you would like to interact with us.
    here's the spot to do it - //metalworkforums.com/f300

    Cheers
    Grahame
    Last edited by Grahame Collins; 30th Apr 2016 at 10:44 AM. Reason: more info

  3. #3
    Join Date
    Oct 2004
    Location
    Southern Highlands NSW
    Posts
    1,894

    Default

    The 250mm scale is more like 249mm from my printer.
    Close enough!

    Thanks,
    Jordan

  4. #4
    Join Date
    Jun 2009
    Location
    West Aust
    Posts
    5

    Default

    Jordan
    The most important measurement is the "1mm" thread form that you should measure with an accurate rule to make sure the printer is not distorting the width of the page and thus all the the thread pitch forms. The 150 mm arrow at the bottom of the page doesn't work as good as lining up the 1mm thread with a rule.
    The thread pitch forms are a quick(el cheapo) and thread gauge. if you find your printer is slightly out then correct it as close as possible by scaling the print 99% or 101%.
    The ruler does not have to be super accurate as bolts come in 1/4" or 5mm length increments.
    Also
    There is a one in ten 1:10 diagonal line superimposed over the threads - put a ruler on the diagonal line and slide your bolt down it until it touches the 250mm ruler line this gives you the diameter of a bolt or drill x 10 - a 5mm drill should line up with the 50mm on the 250mm line.

    Hope its useful to you
    regards moorebrm

  5. #5
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    I have a Samsung monochrome Laser printer, width wise, with default margins, the dimensions are just about spot on. However the print is compressed in length a percent or two. I accidentally discovered that not having top and bottom margins allowed the print to be the correct size. I have since found that changing the margins alters the algorithm for "Fit to page", where the printer recalculates the page size to suit the margins that you specify.

    Hope this helps when printing things that have to be accurately sized.
    Best Regards:
    Baron J.

  6. #6
    Join Date
    Jun 2009
    Location
    West Aust
    Posts
    5

    Default Inch to Decimal conversion chart

    I have added this Inch to Decimal conversion chart for accurate conversions up to 20 inches

    Regards moorebrm
    Attached Files Attached Files

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