Ryobi SA120 - Manual (Page 15)

Page 15
OPERATION
VARIABLE SPEED
See Figure 9.
Your drill has a variable speed feature in the switch. The
switch delivers higher speed and torque with increased
trigger pressure. Speed is controlled by the amount of
switch trigger depression.
WARNING:
Always wear safety goggles or safety glasses with
side shields when operating tool. Failure to do so could
result in objects being thrown into your eyes, result-
ing in possible serious injury.
DRILLING
See Figure 11.
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. However, the
lower speed feature allows starting holes without center
punching if desired. To accomplish this, simply operate your
drill at lower 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, the drill has a tendency to grab
and kick opposite to the direction of rotation and could
cause loss of control when breaking through mate-
rial. If you are 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.
Fig. 11
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