Torque wrench setting conversion?

[paul miles]

Can anyone convert feet-Lbs to Lbs-feet for torque wrench settings??

[Youngster]

Hi Paul, arent they the same thing?


Cheers


Ian

[paul miles]

HiIan,

Im not sure, Maths wasnt my best subject at School, in fact I thought my name was Coulddobetter for many years!
Thanks for your interest though.
Regards
Paul

[Eamonn]

quote:
Can anyone convert feet-Lbs to Lbs-feet for torque wrench settings??


A foot-pound is the amount of effort that a 1 pound weight applies at a distance of 1 foot from the (in this case) nut/bolt. A pound-foot is exactly the same force over exactly the same distance - thus you can consider them the same thing.

According to Wikipedia a pound-foot is often used by machine manufacturers as the measurement of output from an engine whereas a foot-pound is the amount of energy of input that you need to put in.

Finally 1 foot-pound is 1 1/3 Newton-Metres (Nm), so to convert between foot-pounds and Nm multiply by 4 and divide by 3. To convert from Nm to foot-pounds multiply by 3 and divide by 4.

[Eric]

ft/lbs & lbs/feet are one and the same thing just a different way of expressing it.

As for your lightweight cylinder head the book says 35 ft/lbs that's the same as the heavyweight singles, but quite a lot more than the twins that have only 16 ft/lbs for the 5/16" dia studs and 25 ft/lbs for 3/8" ones.

If you only have Newton Metres on your torque wrench you will need to convert at the rate of 1.36 Nm for every ft/lb so 35 ft/lbs would be 47 Nm.Edited by - Eric on 24 Aug 2008 4:12:51 PM

[paul miles]

Hi everyone,
Thank you so much for all your answers, I knew you would come up trumps
Thanks once again
Paul M