EXTENSIONS
When attaching an adaptor, the torque applied by the extension to
the fastener is always more than the torque setting on the wrench.
Follow the formulas below to correct torque settings.
A - Torque applied by extension to the fastener.
R - Torque Set on the wrench.
L - Lever length (from center of handle to center of ratchet head
drive).
E - Extension length (from center Ratchet head drive to center of
socket or fastener).
Example:
If you desire 50 ft.lbs at the end of the adaptor (A) then the torque
setting on the wrench (R) is calculated as follows:
Where: L = 16 inches
E = 2 inches
R = 50 (16/18)
R = 50 X 0.8888
= 44.44 ft. lbsR
Torque set on the wrench is 44.44 ft-lbs
(the formula above is applicable for in-line adapter only)
NOTE
Extension
(Adapter)
Any length of extension can be used. When the adaptor is attached
perpendicular to the axis of the wrench the torque setting on the
wrench is equal to the torque on the fastener.
NOTE:
1.Regular (concentric) socket extensions which extend directly under
the drive head along the axis of the drive do not affect the calibration
of the Torque Wrench.
2.A handleextension (a piece of pipe extending the handle'slength) MUST
NOT BE USED under any circumstance.Theiruse will resultin erroneous
torque readings and may damage the grip or the adjusting mechanism.
While applyingtorque,the wrench should be held ONLY BY THE GRIP. At
high torque readings, if both hands are necessary to apply enough
pressure to operate the wrench, hold the grip in one hand, and put the
other hand on the top of the first hand, never on the wrench body.
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