Manual Makita da 391 dw (page 4 of 8) (English, Dutch)

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OPERATING INSTRUCTIONS

Installing or removing battery cartridge (Fig. 1)

• Always switch off the machine before insertion or

removal of the battery cartridge.

• To remove the battery cartridge, pull out the set plate

on the machine and grasp both sides of the cartridge

while withdrawing it from the machine.

• To insert the battery cartridge, align the tongue on the

battery cartridge with the groove in the housing and slip

it into place. Snap the set plate back into place. Be sure

to close the set plate fully before using the machine to

prevent the battery cartridge from accidentally falling

out of the machine.

• Do not use force when inserting the battery cartridge. If

the cartridge does not slide in easily, it is not being

inserted correctly.

Installing or removing drill bit or driver bit

Important:

Always be sure that the machine is switched off and the

battery cartridge is removed before installing or removing

the bit.

For DA301D (Fig. 2 &4)

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 use, return the chuck key to the storage cavity on

the machine.

For DA391D (Fig. 3)

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 clock-

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

and turn the sleeve counterclockwise.

Switch action

(Fig.5 for DA301D & Fig. 6 for DA391D)

CAUTION:

• Before inserting the battery cartridge into the machine,

always check to see that the switch trigger actuates

properly and returns to the “OFF” position when

released.

• Always check the direction of rotation before operation.

• Use the reversing switch lever only after the machine

comes to a complete stop. Changing the direction of

rotation before the machine stops may damage the

machine.

• When not operating the machine, keep the reversing

switch lever in the neutral position.

Set the reversing switch lever just in front of the switch

trigger to

i / “FWD” side for clockwise rotation or j /

“REV” side for counterclockwise rotation. To start the

machine, simply pull the trigger. Machine speed is

increased by increasing pressure on the trigger. Release

the trigger to stop. When the reversing switch lever is in

the neutral position, the machine will not start even if you

pull the trigger.

Drilling operation

• Drilling in wood

When drilling in wood, 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 excep-

tions are iron and brass which should be drilled dry.

CAUTION:

• Pressing excessively on the machine will not speed up

the drilling. In fact, this excessive pressure will only

serve to damage the tip of your bit, decrease the

machine performance and shorten the service life of

the machine.

• There is a tremendous twisting force exerted on the

machine/bit at the time of hole breakthrough. Hold the

machine firmly and exert care when the bit begins to

break through the workpiece. Use both hands to help

control the machine.

• A stuck bit can be removed simply by setting the

reversing switch to reverse rotation in order to back out.

However, the machine may back out abruptly if you do

not hold it firmly.

• Always secure small workpieces in a vise or similar

hold-down device.

Screwdriving operation

Place the point of the driver bit in the screw head and

apply pressure to the machine. Start the machine.

Release the trigger just as the screw bottoms out. If the

trigger is not released, the screw may strip out the hole or

the screw and/or bit may be damaged.

NOTE:

• Make sure that the driver bit is inserted straight in the

screw head, or the screw and/or bit may be damaged.

• When driving wood screws, predrill pilot holes to make

driving easier and to prevent splitting of the workpiece.

See the chart.

Overload protector (Fig.7)

The overload protector automatically cuts out to break

the circuit and the button pops out, whenever heavy work

is prolonged. Wait 20 – 30 seconds before pressing the

restart button to resume operation. Your finger should not

be on the trigger when you press the restart button, how-

ever.

Nominal diameter of

wood screw (mm)

Recommended size of

pilot hole (mm)

3.1 2.0 – 2.2

3.5 2.2 – 2.5

3.8 2.5 – 2.8

4.5 2.9 – 3.2

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Makita da 391 dw Manual

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