Operation - Ryobi HD420 Manual Del Operador

AUXILIARY HANDLE ASSEMBLY
See Figure 1, page 11.
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°.
 Loosen the handle assembly by turning the handle coun-
terclockwise.
 Slide the auxiliary handle assembly onto the hammer drill
in the desired operating position.
 Securely tighten by turning the auxiliary handle clockwise.
NOTE: Be sure the auxiliary handle is securely tightened
against the depth stop rod clamp. This secures the depth
stop rod at the desired depth of cut. It also secures the
auxiliary handle.
WARNING:
Do not allow familiarity with products to make you care-
less. Remember that a careless fraction of a second is
sufficient to inflict serious injury.
WARNING:
Always wear eye protection with side shields marked to
comply with ANSI Z87.1. Failure to do so could result in
objects being thrown into your eyes, resulting in possible
serious injury.
WARNING:
Do not use any attachments or accessories not
recommended by the manufacturer of this product. The
use of attachments or accessories not recommended
can result in serious personal injury.
APPLICATIONS
You may use this product for the purposes listed below:
 Drilling in all types of wood products (lumber, plywood,
paneling, composition board, and hard board)
 Drilling in ceramics, plastics, fiberglass, and laminates
 Drilling in metals
 Driving screws
 Hammer drilling in concrete, brick, or other masonry
ASSEMBLY
INSTALLING THE CHUCK KEY STRAP
See Figure 2, page 11.
Use the chuck key strap to store the chuck key when not
in use.
To install:
 Form a loop by forcing the end of the strap with the round
holes through the slot on the opposite end.
 Place the loop over the cord and pull it tight.
 Mount the chuck key by inserting the geared end through
the hole in the holder. Large keys fit in the larger hole;
smaller keys fit in the small hole.

OPERATION

SWITCH TRIGGER
See Figure 3, page 11.
To turn the drill ON, depress the switch trigger. To turn it
OFF, release the switch trigger.
VARIABLE SPEED
The variable speed dial delivers higher speed by turning the
variable speed dial clockwise. For slower speeds, turn the
dial counterclockwise.
The variable speed switch delivers higher speed with in-
creased trigger pressure and lower speed with decreased
trigger pressure.
NOTE: You might hear a whistling or ringing noise from
the switch during use. Do not be concerned; this is a
normal part of the switch function.
LOCK-ON BUTTON
See Figure 3, page 11.
This drill is equipped with a lock-on feature, which is con-
venient for continuous drilling for extended periods of time.
To lock-on:
 Depress the switch trigger.
 Push in and hold the lock-on button, located on the side
of the handle.
 Release the switch trigger.
 Release the lock-on button and the drill will continue
running.
 To release the lock, depress and release the switch
trigger.
7 — English