Torque Specifications
Teledyne Continental Motors, Inc.
TM
B-4
IOF-240 Series Engine Maintenance Manual
29 November 2006
B-3.
Torque Wrench and Extension Calculations
Torque wrenches measure the force applied to the fastener on the axis of the square drive
socket adapter.
Figure B-1.
Torque Wrench
Straight extensions, including wobble extensions up to 15 degrees, which extend the
square drive length, do not alter the amount of force applied to the square drive enough to
cause concern. An offset adapter may be used with a torque wrench without affecting
applied torque if the extension is positioned at a 90 degree angle in relation to the square
drive adapter. In any other orientation, the extension alters the force applied to the
fastener.
Figure B-2.
Drive extensions
Apply the formula below to determine the appropriate torque wrench setting when using
an extension:
T
S=
A + B
x A
Where:
S = desired torque setting or reading
T= torque applied at square drive adapter
A= length of handle in inches
B= length of extension in inches
