#936185  07/07/15 09:04 PM
Re: Torque wrenches and measuring torque
[Re: Matts_12GS]

Joined: Jan 2014
Posts: 1,926
greiffster
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Administrator
Member
Joined: Jan 2014
Posts: 1,926
Clarksville, Tennessee

1. Is there a "best practice" type forumla to use for calculating actual torque? 2. If we use either method of adapting the torque wrench, does it matter the orientation to the torque wrench, e.g. @ 000 degrees straight off the end of the wrench, 090 degrees? Etc.
I'm not sure if there is a straight up formula for calculating the torque while using a crow foot, but it should be "easy" to figure out. Multiply the set torque on the click wrench times the increase in moment arm due to the length of the crow foot to calculate the actual torque applied at the moment the wrench clicks. So.... If the crow foot straight out the end of the wrench adds 1 inch and the set point on the wrench is 14 ftlbs. Then 1.08x14=15.2 flbs. So when the wrench clicks, you have applied 15.2 ftlbs to the nut. Always measure from the center of the ratchet to the “center” of the claw. If the claw is 90 deg. to the wrench arm, than the applied torque should be equal to the click wrench setting (or really, really close).
Mike '08 GSA "If I don't like it, I'm not blaming myself!" K. Greiff "Anything worth doing is worth overdoing." M. Jagger




