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Torque

Community Veteran
Posts: 7,910
Thanks: 589
Fixes: 8
Registered: 02-08-2007

Torque

Anyone good at maths out there ?
Is Lbs/sq ft  the same thing as Lbs in weight ?
Thing is I have a torque wrench about 50 years old and assume it is not as accurate as it once was but need it for a one off job (ie not worth buying a new one)
I was thinking of using one of those cheap sets of scales used to check the weight of luggage and connecting a wire to the hook with the other end wrapped around a socket on the torque Wrench to check it's accuracy, hence the reason for the question.
6 REPLIES
Community Veteran
Posts: 38,244
Thanks: 933
Fixes: 54
Registered: 15-06-2007

Re: Torque

Torque is measured in lbs ft that is the weight of 1 lb at a radius of 1 ft so you need to correct for the distance from the spanner bit to where you are attaching the weight
So if the length is 6" and the weight is 1 lb that is 0.5 lbs ft
Community Veteran
Posts: 7,910
Thanks: 589
Fixes: 8
Registered: 02-08-2007

Re: Torque

Thanks for that,
The Wrench is just over a foot long so that should work ok.
Glad you were the first to respond before all the gags got in about torque me out of it etc. !!
pierre_pierre
Grafter
Posts: 19,757
Registered: 30-07-2007

Re: Torque

and Lbs/sq ft is an old unit of pressure, pretty low it's normal lp/sq inch
and there is a difference between weight and mass, it brings gravity into it
http://www.mathsisfun.com/measure/weight-mass.html
Community Veteran
Posts: 38,244
Thanks: 933
Fixes: 54
Registered: 15-06-2007

Re: Torque

<pedant mode on>
if force is measured in pounds then mass is measured in slugs
unless you decide that force is measured in poundals and then mass is in pounds
<pedant mode off>
and before you ask - I used both in my younger days then went progressively from cgs to mks to SI
VileReynard
Seasoned Pro
Posts: 10,580
Thanks: 190
Fixes: 9
Registered: 01-09-2007

Re: Torque

Perhaps it is a foot-pound (which is different from a pound-foot)... Smiley
A Newton-Metre is a more sensible term.

Community Veteran
Posts: 16,825
Thanks: 1,114
Fixes: 13
Registered: 06-11-2007

Re: Torque

save getting it wrong.... have a look at this page
http://www.toolbox.co.uk/silverline-250387-spring-5083-84921?utm_source=GoogleBase&utm_medium=GB&utm...
several types and max weights *up to 25kg * for less than a fiver