Makita HP2051F User Manual download pdf (Page 5)

For HP2050, HP2050F

To install the bit, place it in the chuck as far as it will go.

Tighten the chuck by hand. Place the chuck key in each

of the three holes and tighten clockwise. Be sure to

tighten all three chuck holes evenly. To remove the bit,

turn the chuck key counterclockwise in just one hole,

then loosen the chuck by hand. After using the chuck key,

be sure to return it to the original position.

For HP2051, HP2051F

Hold the ring and turn the sleeve counterclockwise to

open the chuck jaws. Place the bit in the chuck as far as it

will go. Hold the ring firmly and turn the sleeve clockwise

to tighten the chuck. To remove the bit, hold the ring and

turn the sleeve counterclockwise.

Depth gauge (Fig. 4)

The depth gauge is convenient for drilling holes of uni-

form depth. Loosen the side grip and insert the depth

gauge into the hole in the grip base. Adjust the depth

gauge to the desired depth and tighten the side grip.

NOTE:

The depth gauge cannot be used at the position where

the depth gauge strikes against the gear housing.

Switch action (Fig. 5)

CAUTION:

Before plugging in the tool, always check to see that the

switch trigger actuates properly and returns to the "OFF"

position when released.

To start the tool, simply pull the switch trigger. Tool speed

is increased by increasing pressure on the switch trigger.

Release the switch trigger to stop. For continuous opera-

tion, pull the switch trigger and then push in the lock but-

ton. To stop the tool from the locked position, pull the

switch trigger fully, then release it.

A speed control screw is provided so that maximum tool

speed can be limited (variable). Turn the speed control

screw clockwise for higher speed, and counterclockwise

for lower speed.

Lighting up the lamps (HP2050F, HP2051F)

CAUTION:

Do not look in the light or see the source of light directly.

To turn on the lamp, pull the trigger. Release the trigger

to turn it off.

NOTE:

Use a dry cloth to wipe the dirt off the lens of lamp. Be

careful not to scratch the lens of lamp, or it may lower the

illumination.

Reversing switch action (Fig. 6)

This tool has a reversing switch to change the direction of

rotation. Move the reversing switch lever to the

D posi-

tion (A side) for clockwise rotation or to the

E position

(B side) for counterclockwise rotation.

CAUTION:

• Always check the direction of rotation before operation.

• Use the reversing switch only after the tool comes to a

complete stop. Changing the direction of rotation

before the tool stops may damage the tool.

Speed change knob (Fig. 7)

Two speed ranges can be preselected with the speed

change knob. Turn the speed change knob so that the

arrow on the tool body points toward the " I " position on

the knob for low speed or " II " position for high speed.

If it is hard to turn the knob, first turn the chuck slightly in

either direction and then turn the knob again.

CAUTION:

• Use the speed change knob only after the tool comes

to a complete stop. Changing the tool speed before the

tool stops may damage the tool.

• Always set the speed change knob to the correct posi-

tion. If you operate the tool with the speed change knob

positioned halfway between the " I " and " II " position,

the tool may be damaged.

Selecting the action mode (Fig. 8)

This tool has an action mode change lever. For rotation

with hammering, slide the action mode change lever to

the right (

g symbol). For rotation only, slide the action

mode change lever to the left (

m symbol).

CAUTION:

Always slide the action mode change lever all the way to

your desired mode position. If you operate the tool with

the lever positioned halfway between the mode symbols,

the tool may be damaged.

OPERATION

Hammer drilling operation

When drilling in concrete, granite, tile, etc., move the

action mode change lever to the position of

g symbol to

use "rotation with hammering" action. Be sure to use a

tungsten-carbide tipped bit. Do not apply more pressure

when the hole becomes clogged with chips or particles.

Instead, run the tool at an idle, then remove the bit par-

tially from the hole. By repeating this several times, the

hole will be cleaned out. After drilling the hole, use the

blow-out bulb to clean the dust out of the hole. (Fig. 9)

Drilling operation

When drilling in wood, metal or plastic materials, move

the action mode change lever to the position of

m symbol

to use "rotation only" action.

Drilling in wood

When drilling in wood, the best results are obtained with

wood drills equipped with a guide screw. The guide

screw makes drilling easier by pulling the bit into the

workpiece.

Drilling in metal

To prevent the bit from slipping when starting a hole,

make an indentation with a center-punch and hammer at

the point to be drilled. Place the point of the bit in the

indentation and start drilling. Use a cutting lubricant

when drilling metals. The exceptions are iron and brass

which should be drilled dry.

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Makita HP2051F User Manual Page 5

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