RIDGID R820071 Operator's Manual page 8

OPERATION
Avoid running the drill at low speeds for extended periods
of time. Running at low speeds under constant usage may
cause the drill to become overheated. If this occurs, cool the
drill by running it without a load and at full speed.
kEYLESS CHUCk
See Figure 5, page 11.
The drill has a keyless chuck to tighten or release drill bits
in the chuck jaws. Grasp and hold the collar of the chuck
with one hand. Rotate the chuck body with your other hand.
The arrows on the chuck indicate which direction to rotate
the chuck body in order to LOCk (tighten) or UNLOCk
(release) the drill bit.
WARNING:
Do not hold the chuck body with one hand and use
the power of the drill to tighten the chuck jaws on
the drill bit. The chuck body could slip in your hand,
or your hand could slip and come in contact with
the rotating drill bit. This could cause an accident
resulting in serious personal injury.
ADjUSTABLE TORqUE CLUTCH
This product is equipped with an adjustable torque clutch
for driving different types of screws into different materials.
The proper setting depends on the type of material and the
size of screw you are using.
ADjUSTING TORqUE
See Figure 4, page 11.
There are eighteen torque indicator settings located on the
front of the drill.
 Rotate the adjusting ring to the desired setting.
• 1 - 3 For driving small screws
• 4 - 7 For driving screws into soft material
• 8 - 11 For driving screws into soft and hard
materials
• 12 - 15 For driving screws into hard wood
• 16 - 18 For driving large screws
INSTALLING BITS
See Figures 5 - 6, page 11.
 Lock the switch trigger by placing the direction of rotation
selector in the center position.
 Open or close the chuck jaws to a point where the opening
is slightly larger than the bit size you intend to use. Also,
raise the front of the drill slightly to keep the bit from falling
out of the chuck jaws.
 Insert the drill bit.
WARNING:
Make sure to insert the drill bit straight into the
chuck jaws. Do not insert the drill bit into the chuck
jaws at an angle then tighten, as shown in figure 8.
This could cause the drill bit to be thrown from the
drill, resulting in possible serious personal injury or
damage to the chuck.
 Tighten the chuck jaws securely on the bit.
NOTE: Rotate the chuck body in the direction of the
arrow marked LOCk to close the chuck jaws. Do not use
a wrench to tighten or loosen the chuck jaws.
REMOVING BITS
See Figures 5 - 6, page 11.
 Lock the switch trigger by placing the direction of rotation
selector in the center position.
 Open the chuck jaws.
NOTE: Rotate the chuck body in the direction of the arrow
marked UNLOCk to open the chuck jaws. Do not use a
wrench to tighten or loosen the chuck jaws.
 Remove the drill bit.
CAUTION:
Do not operate switch trigger with middle finger
and index finger extended. This could cause
fingers to contact moving chuck and may result
in a minor injury.
DRILLING
See Figures 7 - 8, page 11.
 Check the direction of rotation selector for the correct
setting (forward or reverse).
 Secure the material to be drilled in a vise or with clamps
to keep it from turning as the drill bit rotates.
 Hold the drill firmly and place the bit at the point to be
drilled.
 Depress the switch trigger to start the drill.
 Move the drill bit into the workpiece, applying only enough
pressure to keep the bit cutting. Do not force the drill or
apply side pressure to elongate a hole. Let the tool do
the work.
WARNING:
Be prepared for binding at bit breakthrough. When
these situations occur, drill has a tendency to grab
and kick opposite to the direction of rotation and
could cause loss of control when breaking through
material. If not prepared, this loss of control can
result in possible serious injury.
 When drilling hard, smooth surfaces, use a center punch
to mark the desired hole location. This will prevent the
drill bit from slipping off-center as the hole is started.
 When drilling metals, use a light oil on the drill bit to keep
it from overheating. The oil will prolong the life of the bit
and increase the drilling action.
 If the bit jams in the workpiece or if the drill stalls, stop
the tool immediately. Remove the bit from the workpiece
and determine the reason for jamming.
NOTE: This drill has an electric brake. When the switch
trigger is released, the chuck stops turning. When the brake
is functioning properly, sparks will be visible through the
vent slots on the housing. This is normal and is the action
of the brake.
8 - English