I hate torque wrenches! ..help again

[mglowe]

Then why is it the wrench will click at say 135 foot pounds with no pipe or extender on the end and do the same when it is on there? Seems to me the wrench is set at 135 foot pounds and in both cases it still clicked at 135.....

I hope this is the correct logic and will show why.

FT-LB to IN-LB MULTIPLY BY 12
IN-LB to FT-LB DIVIDE BY 12

T = 135 FT-LB or 135*12=1620 IN-LB (DESIRED TORQUE)
L = 10 IN (LENGTH OF WRENCH)
E = 4 IN (HANDLE EXTENSION)

(T*L)/(L+E)=ACTUAL TORQUE

without extended handle (DESIRED TORQUE = YES)

(1620*10)/(10+0)=(16200)/(10)=1620 IN-LB or 1620/12=135 FT-LB

with extended handle (DESIRED TORQUE = NO)

(1620/10)*(10+4)=162*14=2268 IN-LB or 2268/12=189 FT-LB

Test: Remove extension and see if the wrench alone should take 189 FT-LB to move bolt.

correct setting on wrench with extension (DESIRED TORQUE = YES)

(1620*10)/(10+4)=(16200)/(14)=1157.14 IN-LB or 1157.14/12=96.42 FT-LB

Test: Remove extension and see if the wrench alone should take 135 FT-LB to move bolt.

Note: For the above example to work the extension must be perpendicular to the handle.