Manual Makita BTW 450 (page 6 of 40) (English, German, Dutch, French, Italian)

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This can be installed on either side of the tool.

To install the hook, insert it into a groove in the tool

housing on either side and then secure it with a screw.

To remove, loosen the screw and then take it out.

OPERATION

CAUTION:

• Always insert the battery cartridge all the way until it

locks in place. If you can see the red part on the upper

side of the button, it is not locked completely.

Insert it fully until the red part cannot be seen. If not, it

may accidentally fall out of the tool, causing injury to

you or someone around you.

Hold the tool firmly and place the socket over the bolt or

nut. Turn the tool on and fasten for the proper fastening

time. (Fig. 7)

The proper fastening torque may differ depending upon

the kind or size of the bolt, the material of the workpiece to

be fastened, etc. The relation between fastening torque

and fastening time is shown in the figures. (Fig. 8 & 9)

NOTE:

• Hold the tool pointed straight at the bolt or nut.

• Excessive fastening torque may damage the bolt/nut or

socket. Before starting your job, always perform a test

operation to determine the proper fastening time for

your bolt or nut.

• 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

cartridge.

The fastening torque is affected by a wide variety of

factors including the following. After fastening, always

check the torque with a torque wrench.

1. When the battery cartridge is discharged almost

completely, voltage will drop and the fastening torque

will be reduced.

2. Socket

• Failure to use the correct size socket will cause a

reduction in the fastening torque.

• A worn socket (wear on the hex end or square end)

will cause a reduction in the fastening torque.

3. Bolt

• Even though the torque coefficient and the class of

bolt are the same, the proper fastening torque will

differ according to the diameter of bolt.

• Even though the diameters of bolts are the same,

the proper fastening torque will differ according to

the torque coefficient, the class of bolt and the bolt

length.

4. The use of the universal joint or the extension bar

somewhat reduces the fastening force of the impact

wrench. Compensate by fastening for a longer period

of time.

5. The manner of holding the tool or the material of

driving position to be fastened will affect the torque.

6. Operating the tool at low speed will cause a reduction

in the fastening torque.

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 (Fig. 10)

Remove and check the carbon brushes regularly.

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.

Use a screwdriver to remove the brush holder caps.

Take out the worn carbon brushes, insert the new ones

and secure the brush holder caps. (Fig. 11)

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.

• Sockets

• Extension bar

• Universal joint

• Bit adapter

• Makita genuine battery and charger

For European countries only

Noise

ENG102-3

The typical A-weighted noise level determined according

to EN60745:

Sound pressure level (L

): 94 dB (A)

Sound power level (L

): 105 dB (A)

Uncertainty (K): 3 dB (A)

Wear ear protection.

Vibration

ENG205-2

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

according to EN60745:

Work mode: impact tightening of fasteners of the

maximum capacity of the tool

Vibration emission (a

): 19 m/s

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).

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Makita BTW 450 Manual

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