Ryobi HD420 Manual Del Operador página 8

If the lock-on feature is engaged during use and the drill
becomes disconnected from the power supply, disengage
the lock-on feature immediately.
WARNING:
Before connecting the drill to a power supply source,
always check to be sure it is not in lock-on position (de-
press and release the switch trigger). Failure to ensure
that it is not locked-on could result in accidental starting
of the drill resulting in possible serious injury. Do not lock
the switch trigger in applications where the drill may need
to be suddenly stopped.
DIRECTION OF ROTATION SELECTOR
(FORWARD/REVERSE)
See Figure 4, page 11.
The direction of bit rotation is reversible and is controlled
by a selector located above the switch trigger. With the drill
held in normal operating position, the direction of rotation
selector should be positioned to the left of the switch trig-
ger for forward drilling. The drilling direction is reversed
when the selector is to the right of the switch trigger.
NOTICE:
To prevent gear damage, always allow the chuck to
come to a complete stop before changing the direction
of rotation.
To stop the drill, release the switch trigger and allow the
chuck to come to a complete stop.
NOTE: The drill will not run unless the direction of rotation
selector is pushed fully to the left or right.
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.
TO INSTALL BITS
See Figures 5 - 6, pages 11 - 12.
 Unplug the drill.
 Insert the chuck key and twist counterclockwise.
 Open or close the chuck jaws to a point where the open-
ing 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.
OPERATION
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 6. 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 drill bit, using the
chuck key provided.
 Remove the chuck key.
TO REMOVE BITS
See Figure 5, page 11.
 Unplug the drill.
 Loosen the chuck jaws using the chuck key provided.
 Remove the drill bit.
 Remove the chuck key.
USING THE AUXILIARY HANDLE ASSEMBLY
See Figure 7, page 12.
The drill is equipped with an auxiliary handle assembly. For
ease of operation, use the handle with either the left or right
hand. The handle can be rotated 360°.
To adjust the auxiliary handle assembly,
 Loosen the handle assembly by turning the handle
counterclockwise.
 Rotate the auxiliary handle assembly to the desired
operating position.
 Securely tighten by turning the auxiliary handle clockwise.
Be sure the auxiliary handle is securely tightened against
the depth stop clamp. This secures the depth stop rod at
the desired depth of cut. It also secures the auxiliary handle.
NOTE: For convenience and ease of starting threads, the
hex nut has been trapped inside the molded slot in the
auxiliary handle.
The depth stop rod helps control the depth of drilled holes.
NOTE: When properly installed, the teeth on the depth stop
rod should be aligned with the teeth indicator on the depth
stop clamp.
Adjust the depth stop rod so that the drill bit extends
beyond the end of the rod to the required drilling depth.
When drilling holes with the depth stop rod installed, the
desired hole depth has been reached when the end of the
rod comes in contact with the surface of the workpiece.
8 — English