Dial Wrench Operating Instructions
Rev 1.0
Corporate Headquarters:
1080 North 11th Street, San Jose, CA 95112 Phone: (408) 292-2214 Fax: (408) 292-2733
www.etorque.com
Extension Adapters
Adapters offer alternative solution for overcoming space and access
imitations and are available upon request.
1. Place the end fitting to the extension adapter.
2. Then attach to the square drive of the wrench.
3. Measure and note distance “E” from the center of the end fitting to the
wrench square drive.
Square Dr
Item #
Item #
Item #
3/8” Drive
20-A96102
20-A96112
20-A96122
1/2” Drive
20-A96103
20-A96113
20-A96123
Note: Extension Adapters cannot be used with the ADS4, ADS8, ADS12D.
When using extension spanners or adapters, the torque applied to the fastener is greater than that shown on the torque
wrench dial. To calculate the increase, please use the formula below.
Calculations for Torque Wrench Adapters & Spanners
Note than when using extension adapters and spanners, the torque applied to the nut is greater that that shown on the
torque wrench dial. To calculate the increase, use the formula below.
To ensure that the correct torque is applied when using extension spanners, keep the extension “in-line” with the axis of the
wrench (as shown in diagram). Should you wish to permanently use an extension spanner on the Dial wrenches, we can lock
the ratchet mechanism and re-calibrate the dial to show a true torque reading for that particular extension. The following table
gives the value of dimensions “L” for all Dial wrenches. It is important to have the “L” dimension for any wrench where an
extension is required.
E
TT =
DR (L + E)
L
TT = True Torque
DR = Dial Reading
E = Extension Length
L = Effective Wrench Length
L + E
E
L
True
Torque
TT
Indicated Torque
(Dial Reading) DR
Model
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
Dimension L
7.5
190
14.5
368
17.5
445
25
635
33
850
68
1727
All ADS
Models
BDS80,
A/AS/E/ES
Other BDS
models
CDS
models
DDS
models
EDS
models
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