Operation - Porter-Cable 866 Instruction Manual

900467 - 11-30-00.QXD
4. While holding the bit with one hand, turn outer sleeve (A) Fig. 2, clockwise
until the bit is gripped in the chuck.
5. Tighten chuck by holding chuck ring (B) Fig. 2, with one hand while
turning outer sleeve (A) clockwise with other hand. Tighten securely.
WARNING: Do not operate drill motor while installing or removing
bits. Operating drill motor can cause bit to be thrown from chuck
causing personal injury.
6. To remove bit, reverse foregoing procedure.
ADJUSTING TORQUE COLLAR
The clutch unit provides twenty clutch
settings plus a "Drill" (solid-lockup) setting.
Lowest torque is available at setting #1, with
maximum torque available at the "Drill"
setting. The amount of output torque may be
adjusted by rotating the front collar (A) Fig. 3,
so that the desired torque setting is aligned
with the index mark (B) Fig. 3. In general,
lower torque settings are used for driving
small screws and other delicate work, while
higher torque settings are used for driving
larger screws. The "Drill" position is used for
drilling and for driving very large screws.
TWO-SPEED GEAR SHIFT
The Models 866, 876, and 878 Cordless
Driver/Drills have a two-speed gear shift
which provides spindle speed ranges of
approximately: 0 to 350 RPM (LOW) and
0 to 1200 RPM (HIGH) for Model 866;
0 to 450 RPM (LOW) and 0-1450 RPM
(HIGH) for Models 876 and 878. To
change speed ranges: release trigger
switch to stop motor and then slide
speed selector (A) Fig. 4, toward rear for
HIGH speed or toward front for LOW
speed.
The low speed position is normally used when drilling larger holes and when
driving or removing screws. The high speed position is normally used for
drilling small holes.
DRIVER BIT STORAGE
Convenient storage areas with retaining clip (B) Fig. 4, for screwdriver bits are
provided on each side of the tool.
CHARGING THE BATTERY PACK GENERAL
Before using your cordless Driver/Drill for the first time, the battery pack
should be fully charged. If the battery pack is installed in the Driver/Drill,
remove it by following instructions under INSTALLING OR REMOVING
BATTERY PACK.
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OPERATION

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A
B
Fig. 3
B
A
Fig. 4