Black & Decker 7154 - Manual (Page 5)

CHUCK
UNPLUG DRILL! Turn collar to
open chuck jaws. Insert acces­
sory shank into chuck as far as
it will go. Tighten chuck collar
first by hand, and then with
chuck key, using all three
holes. To release shank, turn
chuck key counter-clockwise
in just one hole, then loosen
chuck by hand.
To remove the chuck from the Drill (for
using a threaded shank accessory or for
chuck replacement) first unplug the tool.
If your Drill has a reversing switch, open the
chuck and remove screw in bottom of chuck
(left hand thread). Insert the key in the
chuck and tap it sharply in the direction the
tool normally rotates — see at right. This
will loosen the chuck shank threads and the
chuck may be unscrewed by hand.
SWITCHES
To lock trigger in “ON” posi­
tion when using accessories,
depress trigger and push up
locking button “B,” Figure 4,
then gently release trigger.
To release locking mecha­
nism, depress trigger fully,
then release it.
VARIABLE SPEED SWITCH (a) For normal operation, rotate the Variable
Speed Locking Button “A,” Figure 4, clockwise until it stops. This permits
“FREE HAND” speed control — the farther the trigger is depressed, the
higher the R.P.M. (b) To set the trigger switch to produce a selected
speed each time it is squeezed, first rotate the button clockwise until it
stops. Fully depress trigger, and with the Drill running at highest R.P.M.
push up switch locking button. Release trigger and the tool will stay
“ON.” Now, rotate the button counterclockwise and you will notice a
decrease in R.P.M. Continue rotating button until desired speed is
obtained. To turn Drill “OFF,” squeeze trigger and release, (c) Use lower
speeds for STARTING HOLES WITHOUT A CENTER PUNCH, DRILLING
IN METAL OR PLASTICS, DRIVING SCREWS, DRILLING CERAMICS.
Higher speeds are better for DRILLING WOOD AND COMPOSITION
BOARDS, AND FOR USING ABRASIVE AND POLISHING ACCESSORIES.
Do not lock the switch “ON” when drilling by hand so that you can
instantly release the trigger switch if the bit binds in the hole.
Be sure to release the switch locking button before disconnecting the
plug from the power supply. Failure to do so will cause the tool to start
immediately the next time it is plugged in. Damage or injury could result.
REVERSING SWITCH (Nos. 7054, 7154 Drills only) For removing screws
or easing drill bits out of tight holes, slide the Reversing Switch, Figure
5, toward “R” to reverse the drill motor. The trigger switch should be
released to the “OFF” position before moving the reversing switch. After
any reversing operations, return switch to the forward, “F” position.