Manual Makita BDF 441 (page 8 of 52) (English, German, Dutch, Danish, French, Italian)

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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.

CAUTION:

• Pressing excessively on the tool will not speed up the

drilling. In fact, this excessive pressure will only serve

to damage the tip of your bit, decrease the tool

performance and shorten the service life of the tool.

• There is a tremendous force exerted on the tool/bit at

the time of hole break through. Hold the tool firmly and

exert care when the bit begins to break through the

workpiece.

• A stuck bit can be removed simply by setting the

reversing switch to reverse rotation in order to back

out. However, the tool may back out abruptly if you do

not hold it firmly.

• Always secure small workpieces in a vise or similar

hold-down device.

• If the tool is operated continuously until the battery

cartridge has discharged, allow the tool to rest for

15 minutes before proceeding with a fresh battery.

MAINTENANCE

CAUTION:

• Always be sure that the tool is switched off and the

battery cartridge is removed before attempting to

perform inspection or maintenance.

Replacing carbon brushes

Replace when they wear down to the limit mark. Keep the

carbon brushes clean and free to slip in the holders. Both

carbon brushes should be replaced at the same time. Use

only identical carbon brushes. (Fig. 13)

Use a screwdriver to remove two screws then remove the

rear cover. (Fig. 14)

Raise the arm part of the spring and then place it in the

recessed part of the housing with a slotted bit screwdriver

of slender shaft or the like. (Fig. 15)

Use pliers to remove the carbonbrush caps of the carbon

brushes. Take out the worn carbon brushes, insert the

new ones and replace the carbonbrush caps in reverse.

(Fig. 16)

Make sure that the carbonbrush caps have fit into the

holes in brush holders securely. (Fig. 17)

Reinstall the rear cover and tighten two screws securely.

To maintain product SAFETY and RELIABILITY, repairs,

any other maintenance or adjustment should be

performed by Makita Authorized Service Centers, always

using Makita replacement parts.

ACCESSORIES

CAUTION:

• These accessories or attachments are recommended

for use with your Makita tool specified in this manual.

The use of any other accessories or attachments might

present a risk of injury to persons. Only use accessory

or attachment for its stated purpose.

If you need any assistance for more details regarding

these accessories, ask your local Makita service center.

• Drill bits

• Screw bits

•Hook

• Grip assembly

• Various type of Makita genuine batteries and chargers

• Rubber pad assembly

• Wool bonnet

• Foam polishing pad

For Model BDF441

Noise

ENG103-4

The typical A-weighted noise level determined according

to EN60745:

Sound pressure level (L

): 70 dB (A) or less

Uncertainty (K): 3 dB (A)

The noise level under working may exceed 80 dB (A).

Wear ear protection.

Vibration

ENG202-3

The vibration total value (tri-axial vector sum) determined

according to EN60745:

Work mode: drilling into metal

Vibration emission (a

h,D

): 2.5 m/s

or less

Uncertainty (K): 1.5 m/s

For Model BDF451

Noise

ENG104-2

The typical A-weighted noise level determined according

to EN60745:

Sound pressure level (L

): 72 dB (A)

Uncertainty (K): 3 dB (A)

The noise level under working may exceed 80 dB (A).

Wear ear protection.

Vibration

ENG202-3

The vibration total value (tri-axial vector sum) determined

according to EN60745:

Work mode: drilling into metal

Vibration emission (a

h,D

): 2.5 m/s

or less

Uncertainty (K): 1.5 m/s

ENG901-1

• The declared vibration emission value has been

measured in accordance with the standard test method

and may be used for comparing one tool with another.

• The declared vibration emission value may also be

used in a preliminary assessment of exposure.

WARNING:

• The vibration emission during actual use of the power

tool can differ from the declared emission value

depending on the ways in which the tool is used.

• Be sure to identify safety measures to protect the

operator that are based on an estimation of exposure in

the actual conditions of use (taking account of all parts

of the operating cycle such as the times when the tool

is switched off and when it is running idle in addition to

the trigger time).

EC Declaration of Conformity

ENH101-12

We Makita Corporation as the responsible

manufacturer declare that the following Makita

machine(s):

Designation of Machine: Cordless Driver Drill

Model No./ Type: BDF441, BDF451

are of series production and

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Makita BDF 441 Manual

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