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Alternative to a torque wrench

Discussion in 'The Garage' started by toglhot, May 22, 2019.

  1. toglhot

    toglhot XS650 New Member

    I use this setup for torquing bolts/nuts whenever the occasion arises. This same setup is also suggested for checking the figures on a torque wrench. Now you can't just connect the scale to the spanner and pull until the needle points to the number you're after. The scales measure weight not force so you need to either use a formula or an online converter to convert weight to force. It's also very handy if you need to use a ringy, an open ender or shifter.

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    gggGary, Jim and TwoManyXS1Bs like this.
  2. 650Skull

    650Skull Dinosaur Lives Top Contributor

    I have a problem with the picture............The Spanner is the wrong way round
  3. Jim

    Jim Beyond the edge, is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    If your pull gauge is accurate, yes... it's a good way to check your torque wrench. The formula is simple enough. Weight times arm equals force. Weight is the pounds of pull on the gauge, arm is the distance from the center of the nut to the attach point of the pull gauge. For instance... say "a" in your diagram is 10" and you pull until you gauge says 20lbs of force (weight), then you have 200 inch pounds of torque (20X10=200).
    For foot pounds, take the 10" and divide by 12.
    10 divided by 12 is .8333.... times 20lbs of pull equals 16.666 foot lbs of torque. Or just divide the resultant inch/lbs by 12.... you get the same 16.666 ft/lbs.
    Last edited: May 22, 2019
    TwoManyXS1Bs and gggGary like this.

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