Re: Torque specs

Posted by Mr.Pushbutton  On 2008/3/17 22:54:42

Good advice Packard V8, One other method widely used in automated assembly and lab/racing assembly is to torque fasteners to an angle (like 360 degrees of angle in a complete rotation) while monitoring torque. With this method you start counting angle of rotation after crossing a torque threshold, about 3-5 ft. lbs. and torque the final value based on angle while monitoring torque. The final torque is never that far off of each other, but this system yeilds the most uniform tension between parts, which is what torque alone used to be used exclusively to monitor.
Sears, Snap-On (for the rich fellers), Lisle and others make an inexpensive angle gauge the clicks on to your torque wrench drive like an extension. I wrote about this over on the AACA site and the backyard boys kept coming back saying "it's not as accurate as torquing to the same value so it's not a s good" and I gave up after trying to explain surface tension, fastener elasticity, thread variation, etc.