Fred's torque wrench experiment

[Bob Rossato]

> His key conclusion seems well borne out by his experiment - at
> least I can't
> fault the method...
> 1. The length of the torque wrench does affect the torque generated at the
> socket end of tool 2079 as predicted by Scott J and others.

I wish I had found this site earlier as it might have cut some of the
discussion short.  Yeah, right!  I stumbled on to it this afternoon when I
was trying to find some info on one of my torque wrenches.  This is the
company that makes the torque wrenches that Snap-on sells.

http://www.torqwrench.com/question.htm

BTW, there is a typo in the first formula listed.  The denominator should be
an addition not a multiplication.  It is correct in the subsequent equation.

Also, the chart on the top of the page addresses some of the earlier
comments/questions people had as to affect on torque output based on the
position of your hand on the torque wrench.  It does affect click-type
torque wrenches, but not dial-type.

> Remember that the original question was how tight to make the crank bolt
> when tool 2079 was not available. Let's note that the phenomenon Fred
> described does not apply to tightening a bolt *without* using an
> offset tool
> such as tool 2079.  My practical suggestion still applies - just choose a
> handle that's of a length that makes it practical to tighten the
> bolt. exact
> torque is not critical at all, just cinch the sucker down to 350-plus
> lbs/ft.

Actually, the original poster was only trying to find out what the torque
w/o 2079 was supposed to be so that he could calculate what to set his
torque wrench to when using the 2079 extension.

Bob