NF-Series Plus Models
The Plus models feature a selectable Double Hit Mode for soft joint applications and a selectable Soft Start mode (from 0.2-0.6 sec-
onds).
The Plus model operate only at single speed, which is maximum speed range listed in the data sheet.
NF150 Plus Models: 1700 RPM
NF220 Plus Models: 1200 RPM
NF450 Plus Models: 600 RPM
Double Hit Mode
The Double Hit mode is for very soft joint applications. When an electric screwdriv-
er runs down a fastener and the tool clutches off once the preset torque is
achieved there can be some joint relaxation that can occur. The Double Hit mode
has the electric screwdriver perform a second hit to stabilize the torque for joint
relaxation.
Joint relaxation is caused by the surface of part(s) embedding or by "soft parts"
such as gaskets, plastics or spongy material, which collapses under the clamping
force created in a torque condition. For Hard Joint applications there is no need to
use the Double Hit mode.
The clutch of the electric driver works twice at the set torque under the "Double Hit" mode. The Double Hit will increase the
repeatability accuracy at the target torque by double checking.
Operating the Double Hit Feature with “Plus” models
1) Press the Double Hit button to select this mode. The LED (A) will display the color Orange.
2) When the motor runs, the LED (A) will display the color Green.
NF-Series Operation Instructions
Corporate Headquarters:
1080 North 11th Street, San Jose, CA 95112 Phone: (408) 292-2214 Fax: (408) 292-2733
www.mountztorque.com
Page 5
NF-Series Standard Models & Soft Stop Models (continued)
How to Adjust Soft Start Setting
There are 3 different time settings for the Soft Start mode which are (0.2, 0.4 & 0.6
seconds). The default setting is OFF.
1. Press and hold the Soft Start button for 2 seconds.
2. Two LEDs will display colors that show the current soft start
selection of the brushless screwdriver.
3. Press Soft Start button until the target time is selected.
4. By starting the screwdriver, the selected soft start setting is saved
automatically.
The Soft Start button is “wrap around” button meaning you can toggle through the settings continuously by pressing the button
(OFF - 0.2s-0.4s-0.6s).
