Prior To Operation - Hitachi DV 20V2 Instruction Manual

APPLICATIONS
O By combined actions of ROTATION and IMPACT:
Boring holes in hard surfaces (concrete, marble, granite, tiles, etc.)
O By ROTATIONAL action:
Boring holes in metal, wood and plastic. Tightening machine screws, wood screws.
PRIOR TO OPERATION
1. Power source
Ensure thatthe power source to be utilized conforms to the power requirements specified
on the product nameplate.
2. Power switch
Ensure that the power switch is in the OFF position. If the plug is connected to a power
receptacle while the power switch is in the ON position, the power tool will start operating
immediately, inviting serious accident.
3. Extension cord
When the work area is removed from the power source, use an extension cord of
sufficient thickness and rated capacity. The extension cord should be kept as short as
practicable.
4. Fitting the drill bit or the driver bit
Fit the drill bit or driver bit into the chuck and use the chuck wrench to secure it, tightening
the chuck using each of the three holes in turn.
5. Selecting the appropriate drill bit
O When boring concrete or stone
Use the drill bits specified in the Optional Accessories.
O When boring metal or plastic
Use an ordinary metalworking drill bit.
O When boring wood
Use an ordinary woodworking drill bit.
However, when drilling 1/4" or smaller holes, use a metalworking drill bit.
6. Selecting the driver bit
Screw heads or bits will be damaged unless a bit appropriate for the screw diameter
is employed to drive in the screws.
7. Confirm the direction of bit rotation (Fig. 4)
The bit rotates clockwise (viewed from the rear side)
by pushing the R-side of the reversing switch lever.
The L-side of the lever is pushed to turn the bit
counterclockwise.
CAUTION
Never change the direction of bit rotation while
operating. Turn the power switch OFF before chang¬
ing the direction of bit rotation: otherwise, burning
of the motor will result.
Always use the hammer drill with clockwise rota¬
tion, when using it as an hammer drill.
Fig. 4 (DV20V2-DV14V)