How to read manual torque settings - Page 2
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How to read manual torque settings

This is a discussion on How to read manual torque settings within the Suspension forums, part of the Can-am Maverick Technical Discussions category; Originally Posted by WisconsinMike These are my 2 go to torque wrenches. https://shop.snapon.com/product/ATECH2FR100B https://shop.snapon.com/product/ATECH3FR300B Nice and pricey. I think I will stick with the ones ...

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Thread: How to read manual torque settings

  1. #11
    Senior Member sand shark's Avatar
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    Quote Originally Posted by WisconsinMike View Post
    Nice and pricey. I think I will stick with the ones from Harbor Freight.


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  2. #12
    Member WisconsinMike's Avatar
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    Not pricey at all when your son is a snap on engineer. I think I have a dozen or so in various size and ranges from 1/4",3/8",1/2", 3/4 and 1' drives and 12 in-lb thru 600 ft-lb. thur 600 ft lbs.

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    If it says 69ft lbs, you can either do 6 or 9.
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    Member Sandbox_Kid's Avatar
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    During my time in the service I was also told by the calibration guys that a percentage of the bottom range was not considered accurate either. That was in the late 80's, so I'm not sure it that holds true today.
    2018 Can-Am Maverick X3 Max X DS Turbo R


  6. #15
    Member WisconsinMike's Avatar
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    Quote Originally Posted by Sandbox_Kid View Post
    During my time in the service I was also told by the calibration guys that a percentage of the bottom range was not considered accurate either. That was in the late 80's, so I'm not sure it that holds true today.
    It does. Never use the bottom 20% of the range.

  7. #16
    Junior Member boomkanani's Avatar
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    Quote Originally Posted by WisconsinMike View Post
    Quote Originally Posted by Sandbox_Kid View Post
    During my time in the service I was also told by the calibration guys that a percentage of the bottom range was not considered accurate either. That was in the late 80's, so I'm not sure it that holds true today.
    It does. Never use the bottom 20% of the range.
    To clarify, subtract 20% of the max torque rating from the bottom end of use.

    Example: if you have a 0-100 ft lbs torque wrench...20% of 100 = 20. Therefore, you should only use 20-100 ft lbs range.

    In addition, the +/- rating of the torque wrench should also be subtracted from the top and lower torque ratings.

    Example: continuing with the 0-100 ft lbs wrench above, assume the torque wrench is calibrated to +/- 8%. 8% of 20 = 1.6; 8% of 100 = 8 Therefore, the usable range of a 0-100 ft lbs torque wrench calibrated to 8% is 21.6 to 92 ft lbs.
    Last edited by boomkanani; 08-23-2019 at 10:19 PM.

  8. #17
    Senior Member nogd's Avatar
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    Quote Originally Posted by boomkanani View Post
    In addition, the +/- rating of the torque wrench should also be subtracted from the top and lower torque ratings.

    Example: continuing with the 0-100 ft lbs wrench above, assume the torque wrench is calibrated to +/- 8%. 8% of 20 = 1.6; 8% of 100 = 8 Therefore, the usable range of a 0-100 ft lbs torque wrench calibrated to 8% is 21.6 to 92 ft lbs.
    I'm not trying to spell check you, just adding to the discussion.

    In your example ±8% is in regards to accuracy and would be stated as full scale or indicated value. Your example discusses accuracy full scale so I'll add to that. If you torque a fastener to 92 ft. lbs with a 100 ft. lb wrench calibrated @ ±8% accuracy FS you are applying between 84.64 and 99.36 ft. lbs minus running torque (assuming you are using a click wrench in lieu of a deflecting beam wrench)
    Additionally, the usable range mentioned of 20% to 100% generally applies to quality mechanical wrenches; quality electronic wrenches generally have a useable range of 10% to 100%.
    ±4% accuracy FS is typical of high quality torque wrenches.

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    Last edited by nogd; 09-01-2019 at 01:32 AM.

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    Junior Member desertguy's Avatar
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    Unless the nut is self locking then you need to do a run on torque test with a dial torque driver. If the friction of the locking feature is say 3-5 lbs. then you need to add 3-5 lbs extra to your final torque. That is an aerospace standard and does apply to all locking fasteners. Even if you torque it to the high side you still could be under torqued due to the frictional values of the locking nut.

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