Ryobi D40 - Manual (Page 9)

9
OPERATION
WARNING:
Make sure to insert drill bit straight into chuck jaws.
Do not insert drill bit into chuck jaws at an angle and
then tighten, as shown in Figure 5. This could cause
drill bit to be thrown from drill, resulting in possible
serious personal injury or damage to the chuck.
REMOVING BITS
See Figure 4.
■ Unplug your drill.
WARNING:
Failure to unplug your drill could result in accidental
starting causing serious injury.
■ Loosen the chuck jaws from drill bit.
■ To loosen: grasp and hold the collar with one hand,
while rotating chuck body with your other hand.
Note: Rotate chuck body in the direction of the arrow
marked UNLOCK to loosen chuck jaws.
■ Do not use a wrench to tighten or loosen the chuck
jaws.
■ Remove drill bit from chuck jaws.
Fig. 5
WRONG
WARNING:
Always wear safety goggles or safety glasses with
side shields when operating your drill. Failure to do
so could result in dust, shavings, loose particles or
foreign objects being thrown into your eyes, causing
possible serious injury.
DRILLING
See Figure 6.
When drilling hard smooth surfaces use a center punch
to mark desired hole location. This will prevent the drill
bit from slipping off center as the hole is started. How-
ever, the low speed feature allows starting holes with-
out center punching if desired. To accomplish this, sim-
ply operate your drill at a low speed until the hole is
started.
The material to be drilled should be secured in a vise
or with clamps to keep it from turning as the drill bit
rotates.
Hold tool firmly and place the bit at the point to be drilled.
Depress the switch trigger to start tool.
Move the drill bit into the workpiece applying only
enough pressure to keep the bit cutting. Do not force or
apply side pressure to elongate a hole.
WARNING:
Be prepared for binding or 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 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 workpiece or if the drill stalls, release
switch trigger immediately. Remove the bit from the
workpiece and determine the reason for jamming.