Mountz FG Operating Instructions

FG PRESET TORQUE SCREWDRIVER
OPERATING INSTRUCTIONS
Rev 1.1 (9/6/2019)
The FG has external no adjustment scale and must be preset using a torque analyzer or torque sensor. If the tool has not
been preset to a set torque value, then follow the directions for adjusting the torque setting before using the screwdriver.
Adjusting the Torque Setting for a Preset Value
1. Use a 5mm hexagonal key and remove end cap with from screwdriver anti-clockwise
direction. Also, remove the T-bar where fitted (for FG-40i and FG-125i models only)
2. Use a 2.0mm hexagonal key to loosen the adjuster locking screw by 1/4 - 1/3 turn until
slightly disengaged. A full turn is too much and will hinder the available hex depth. Insert
the 5mm hexagonal key into the adjuster and turn Clockwise. Turn hex key clockwise to
increase torque and counter clockwise to decrease torque. Tighten the locking screw to
10 lbf.in using the 2.0mm hexagonal key once required torque value is reached. Caution,
overtightening the locking screw may damage it or result in incidental turning of the
adjustment screw.
3. Take 10 consistent readings on the Torque Analyzer to confirm the torque setting. Do not
adjust torque above or below the recommended torque ranges for the torque screwdriver
or torque analyzer. Tighten end-cap back on using a 5mm hexagonal key.
Note: Do not adjust the torque setting while the screwdriver is connected to a torque
analyzer or torque sensor as you can overtorque and damage the sensor. The FG-8i
model does not have a set screw within the adjustment screw.
Applying Torque
1. Tighten fastener or bolt by applying steady twists. Screwdriver should be kept at 90
degrees to axis of bolt during tightening. When pre-set torque is reached, the screwdriver
will 'slip.'
2. The screwdriver will automatically reset itself for the next application.
3. With its unique cam-over design, it's impossible to over tighten beyond the preset load.
Calibrating Torque Screwdrivers
To calibrate torque screwdrivers either use a torque analyzer or torque sensor within the range
of the torque screwdriver. For torque screwdrivers calibrate torque in "Peak" mode with a
torque tester or torque sensor. Make sure to apply the torque slowly and smoothly.
1. Select a torque tester or torque sensor that covers the torque range of the screwdriver.
Connect screwdriver to the torque tester or torque sensor using the appropriate adapters
as needed.
2. Apply torque clockwise slowly until screwdriver 'slips' and note reading.
3. Adjust screwdriver to required torque setting as described above.
4. Test and repeat adjustment as necessary to obtain desired torque value.
SILICON VALLEY HEADQUARTERS
1080 North 11th Street, San Jose, CA 95112 | Phone: (408) 292-2214 | Fax: (408) 292-2733 | mountztorque.com
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