MasterForce 241-0413 Manual do Operador descarregar pdf (Página 12)

Page 11

The hammer drill has a keyless chuck

to tighten or release the drill bits in the

chuck jaws. The arrows on the chuck

indicate which direction to rotate the

chuck body in order to GRIP (tighten) or

OPEN (release) the chuck jaws on the drill

bit. The ratcheting feature is designed

to prevent the chuck from opening during

operation.

TWO-SPEED GEAR BOX (FIG. 4)

The hammer drill has a two-speed gear

box designed for drilling or driving at LO

or HI speeds. A slide switch is located on

the top of the hammer drill to select either

LO or HI speed.

When using the hammer drill in the LO

speed range, the speed will decrease and

the hammer drill will have more power and

torque. When using the hammer drill in the

HI speed range, the speed will increase

and the hammer drill will have less

power and torque. Use LO speed for high

power and torque applications and HI

speed for fast drilling or driving

applications.

Use LO speed for starting holes without

a center punch, drilling metals or plastic,

drilling ceramics, or in applications

requiring a higher torque (see below).

OPERATION

HI speed is better for drilling wood and

wood composites and for using abrasive

and polishing accessories.

NOTICE: Avoid running the hammer drill at

LO speed for extended periods of time.

Running at LO speed under constant

usage may cause the hammer drill to

become overheated. If this occurs, cool

the hammer drill by running it without a

load at HI speed.

NOTICE: Never change gears while the

tool is running. Failure to obey this

caution could result in serious damage to

the hammer drill.

SCREWDRIVING/DRILLING/

HAMMER DRILLING MODE

SELECTION (FIG. 5)

To select the mode, rotate the mode

selection ring until the appropriate icon

aligns with the arrow and clicks into

position.

FIG. 4

Two-speed gearbox switch

FIG. 5

Arrow

Mode selection ring

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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