FORMULA INPUTS
The amount of leverage that's applied to a fastener is affected by the position of a
drive tool in relation to the torque wrench's drive tang. When using an off-axis tool that
doesn’t align with the drive tang, such as a crowfoot wrench, you may need to adjust
your torque setting.
T1
— Torque specification for the fastener
L
— Effective length of the torque wrench
TRQ62103: L = 15.62 in.
TRQ62203: L = 19.22 in.
C
— Change in length caused by a crowfoot wrench or other drive tool that
doesn’t align with the drive tang
T2
— Torque value you should use
LEVERAGE ADJUSTMENT
T1 ×
= T2
L
L + C
T1 ×
= T2
L
L + (-C)
90º
>90º
<90º
5
If possible, align the
drive tool at a 90-degree
angle to the drive tang.
If a different angle is required, use one of the formulas
below to determine the appropriate torque value.
No formula is needed. Set
the torque value to the
fastener’s specification.
FORMULA OUTPUTS
Measure from the center of the fastener to the center of the drive tang in
a line parallel to the body of the wrench.
See Example 1
See Example 2
CALCULATION
