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1. Make sure power circuit voltage is the same as that shown on the
specification plate of screwdriver. Connect screwdriver to power circuit.
2. Squeeze trigger switch (A), Fig. 1, to start motor, as the trigger switch is
squeezed, the driver speed increases. The screwdriver bit will not rotate until
engaged in a fastener and forward pressure is applied to the tool. To stop
motor, release trigger switch.
3. LOCK BUTTON - A lock button (B), Fig. 1, is provided to keep motor
running without holding the trigger switch ON.
TO LOCK the trigger switch ON, squeeze the trigger as far as it will go, push
in lock button and release trigger.
TO UNLOCK lock button, squeeze trigger and release, leaving lock button free
to spring out.
4. DIRECTION OF ROTATION – PORTER-CABLE screwdrivers will rotate
either in a clockwise direction for driving fasteners with a right hand thread, or
a counter clockwise direction for removing fasteners with a right hand thread.
To determine rotation, stop the motor by releasing the trigger switch and move
the reversing lever (C), Fig. 1, in the direction marked “reverse” for counter-
clockwise rotation, or in the opposite direction for clockwise rotation.
TO CHANGE HEX NUTSETTER – MODELS 6641, 6642
1. CAUTION: DISCONNECT TOOL FROM POWER SOURCE.
2. Pull the adjusting collar (A), Fig. 2, forward, (away from the power unit),
and rotate collar counterclockwise, to remove the depth stop assembly (B),
Fig. 2, from the clutch housing.
3. Pull nutsetter (C), Fig. 3, straight out. If it is difficult to remove, grip with
pliers and pull.
4. Push selected nutsetter into screwdriver spindle until ball in spindle snaps
into groove in nutsetter shank.
5. Replace depth stop and adjust for depth of drive (see TO ADJUST DEPTH
STOP, MODELS 6641, 6642).
TO ADJUST DEPTH STOP – MODELS 6641, 6642
1. Pull the adjusting collar (A), Fig. 2, forward, (away from power unit), and
hold while performing step 2.
2. Turn adjusting collar until end of depth stop is flush with end of nutsetter.
Do not push in nutsetter as this will engage internal drive.
Fig. 1
C
A
B
902387 - 10-31-01.qxd 2/12/02 3:30 PM Page 6