Greenlee Textron / Subsidiary of Textron Inc.
7
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
7904SB/7906SB Hydraulic Punch Driver
Operation
4. Turn the release valve knob clockwise. Rotate
driver to best operating position, and then pump
lever handle until the punch is completely through
the material.
5. Release by turning release valve knob counterclockwise
and remove the punch, die, adapter and draw stud.
6.
Install 3/4" draw stud and select proper size punch and
die for desired size hole and repeat steps 4 and 5.
The 1/2" conduit-size punch is often used to increase
the size of the pilot hole; this is called “step-up punch-
ing”. After enlarging the pilot hole, the 3/4" draw stud is
used to punch the final hole. See steps 1-6.
1.
Drill 1/2" pilot hole using a Greenlee Kwik-Stepper
®
step bit.
2. Turn the release valve counterclockwise to make
sure the ram is fully extended. Install 3/8" draw
stud, 3/4" x 3/8" adapter, spacer and 1/2" conduit
die and insert into pilot hole.
3. Thread 1/2" conduit punch onto draw stud until the
punch is tight. Make sure the draw stud threads are
fully engaged in the punch.
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