Motion Pro 08-0380 User Manual

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Motion Pro, Inc.

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www.motionpro.com

INSTRUCTIONS

MOTION PRO ADJUSTABLE TORQUE WRENCH ADAPTER P/N 08-0380

The Motion Pro Adjustable Torque Wrench Adapter is designed to be used with a torque wrench to
accurately tighten fasteners that you cannot reach with a socket. This tool will work with most 6mm
(¼”) through 32mm (1 ¼”) combination wrenches and 6mm through 8mm Allen wrenches.

How to use the Adjustable Torque Wrench Adapter:

FIGURE 1

No torque adjustment is required when
the wrench is at a 90° angle to the
handle of the torque wrench.

If you mount the wrench at a 90° angle
to the handle of the torque wrench no

calculations or adjustments to the speci ed

torque value is required (see Fig. 1). This
means the torque that you want to put on
the fastener is equal to the reading from
your torque wrench.

When you mount the wrench parallel to the
handle of the torque wrench, it effectively
lengthens the torque wrench (see Fig.

2). Therefore, the torque value set on
the torque wrench will not be equal to the
torque that you apply to the fastener.
Before using the Adjustable Torque
Wrench Adapter, you must recalculate

the torque speci ed in the service

manual. To recalculate your torque
use the torque adapter extension
formula on page 2.

°

0

9

FIGURE 2

A torque adjustment
is required when the
wrench is parallel to
the handle of the
torque wrench.

A

L

TURN OVER

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TORQUE ADAPTER EXTENSION FORMULA

To recalculate a torque specication when using the

Adjustable Torque Wrench Adapter, use the following formula:

Corrected Torque Reading = Torque Required x Wrench Length

Wrench Length + Extension Length

T = Actual torque reading as listed in the service manual.
R = T x L
L + A L = Torque wrench length. This is the length of your torque wrench--center of
grip to center of drive (see Fig. 2 on page 1). Refer to the instructions that
came with your torque wrench to determine how to measure this length.
A = Extension length (see Fig. 2 on page 1).
R = Corrected torque reading. Torque value to set on torque wrench.

NOTE: Always use the same units (in, ft, mm, cm, etc) for L and A. Do not use the torque adapter extension
formula if the wrench is at an angle and not parallel to the handle of the torque wrench because distance “A” will
be decreased. When the wrench is at a 90-degree angle to the handle of the torque wrench, distance “A” will be
equal to zero (0) and no adjustment is required (see Fig. 1).

Example: To tighten an engine’s cylinder base nuts to 20 ft.-lb. with a 3 inch extension length
(combination wrench parallel to torque wrench handle), and a torque wrench with a wrench length
of 12 inches, compute the extension formula as follows:

1. List all of the known formula variables: T = 20 ft.-lb. (actual torque specication)

L = 12 in. (torque wrench lever length)
A = 3 in. (torque adapter extension length)

2. Plug-in each of the formula variables
into the extension formula: R = T x L = 20 x 12
L + A 12 + 3

3. Thus, you can solve the formula
as follows: R = 20 x 12 = 240 = 16 ft.-lb.
12 + 3 15
Solution: In this example, your torque wrench
would be set at 16 ft.-lb., but the cylinder base nuts would be tightened to 20 ft.-lb.

After recalculating the torque specification, write it down here for future reference.

Model Ft.-lb. N-m

To make conversions from one form to another, use the following torque conversion table:

Multiply By To Obtain

foot-pounds (ft-lb.) 1.356 Newton-meters

foot-pounds 0.1383 kilogram-meters
foot-pounds 12.0 inch-pounds

inch-pounds (in.-lb.) 0.01152 kilogram-meters

inch-pounds 0.1130 Newton-meters
inch-pounds 0.08333 foot-pounds

kilogram-meters (kg-m) 7.233 foot-pounds

kilogram-meters 86.79 inch-pounds
kilogram-meters 9.806 Newton-meters

Newton-meters (N-m) 0.7375 foot-pounds

Newton-meters 8.851 inch-pounds
Newton-meters 0.1020 kilogram-meters

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