BFA-Series & NFA-Series Operation Instructions
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1080 North 11th Street, San Jose, CA 95112 Phone: (408) 292-2214 Fax: (408) 292-2733
www.mountztorque.com
Page 11
Torque Charts
These charts are meant to be used as guidelines for setting the torque on the NFA-Series electric screwdrivers. The
drivers have a torque scale on the torque adjustment nut showing reference numbers. These numbers determine the
approximate torque setting. Refer to the charts to determine the reference number setting for your torque requirement.
How to Read the Torque Charts
Torque ranges (lbf.in) approximate tightening torque, operated with no load at maximum speed. Verify torque setting
with a torque testing system.
NFA150
lbf.in
Z (Bronze)
Torque Range
2.6 - 13 lbf.in
1 2
3 4
5 6
Torque Scale
2
4
6
8
10
12
14
7 8
NFA220
lbf.in
G (Gold)
Torque Range
5.2 - 19 lbf.in
1 2
3 4
5 6
Torque Scale
2
4
6
8
10
12
14
16
7 8
18
20
22
lbf.in
Z (Bronze)
Torque Range
6.1 - 39 lbf.in
NFA450
1 2
3 4
5 6
Torque Scale
5
10
15
20
25
30
35
7 8
40
