DeWalt DW974 Instruction Manual page 9

385360/DW974 etc 5/2/02 11:25 AM
Variable Speed Switch
To turn the tool on, squeeze the trigger switch. To turn the tool off,
release the trigger switch. Your tool is equipped with a brake. The
chuck will stop as soon as the trigger switch is fully released.
The variable speed switch enables you to select the best speed for
a particular application. The farther you squeeze the trigger, the
faster the tool will operate. Use lower speeds for starting holes
without a centerpunch, drilling in metals or plastics, driving screws
and drilling ceramics, or in any application requiring high torque.
Higher speeds are better for drilling in wood, wood compositions
and for using abrasive and polishing accessories. For maximum tool
life, use variable speed only for starting holes or fasteners.
NOTE: Continuous use in variable speed range is not recommended.
It may damage the switch and should be avoided.
Forward/Reverse Control Button
(FIG. 4) A forward/reverse control button determines the direction of
the tool and also serves as a lock off button. To select forward
rotation, release the trigger switch and depress the forward/reverse
control button on the right side of the tool.To select reverse, depress
the forward/reverse control button on the left side of the tool. The
center position of the control button locks the tool in the off position.
When changing the position of the control button, be sure the trigger
is released. NOTE: The first time the tool is run after changing the
direction of rotation, you may hear a click on start up. This is normal
and does not indicate a problem.
Torque Adjustment Collar
The Versa Clutch feature of your Driver/Drill is an adjustable torque
screwdriver mechanism for driving and removing a wide array of
fastener shapes and sizes. The Versa Clutch allows you to
instantaneously regulate the torque, based on the force applied.
Circling the collar are numbers ranging from 0 to 11. These numbers
(and half numbers designated by dots on the collar) are used to set
the clutch to deliver a torque range. The higher the number on the
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collar, the higher the torque and the larger the fastener which can be
driven. To select any of the numbers, rotate until the desired number
aligns with the selector, shown in FIG. 5.
Dual Range Gearing
The dual range feature of your Driver/Drill allows you to shift gears for
greater versatility. To select the low speed, high torque setting
(position 1), turn the tool off and permit to stop. Push the button
forward towards the chuck, as shown in FIG. 5. To select the high
speed, low torque setting (position 2), turn the tool off and permit to
stop. Slide the gear shifter back (away from chuck).
NOTE: Do not change gears when the tool is running. If you are
having trouble changing gears, make sure that the dual range gear
button is either completely pushed forward or completely pushed
back.
Clutch Lock
To lock the clutch for drilling operations, simply move the Driver/Drill
6
FIG. 6
FIG. 5
TORQUE
ADJUSTMENT
COLLAR
4
3
DRIVER/DRILL
2
SELECTOR
DUAL RANGE
GEAR
SHIFTER