 
TM 9254
41.
Torque Wrench  Continued
Figure 46. Torque Wrench  Angled Extension
(2)
When an extension adapter is used as shown in figure 46.
Let:
F
=
Force (pounds)
^{I}T
=
Wrench length (inches) measured from the middle of handle to the center of the tang
^{I}A
=
Extension length (inches) measured from center of socket to center of drive square
L
=
Effective lever length
L
=
IT
x I_{A} cos a (or measure as shown)
(3)
To find torque setting (T_{T}) when desired amount of torque exerted at extension (T_{A}) is known.
EQUATION
^{T}T
= T_{A} X I_{T}
L
(4)
To find torque exerted at extension for a particular torque setting.
EQUATION
^{T}A^{=T}T
X L
^{I}T
e.
Torque Unit Conversion. When checking the specified torque of a bolt, it may be necessary, because of the
torque wrench calibration, to convert torque units from one to another (footpounds to inchounces). This can be done
readily using table 41.
45
