Bedienungsanleitung Makita btp 140 sfe (Seite 9 von 76) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Norwegisch)

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Tightening bolts (Fig. 16 & 17)

The proper fastening torque may differ depending upon

the kind or size of the screw/bolt, the material of the

workpiece to be fastened, etc. The relation between fas-

tening torque and fastening time is shown in the figures.

NOTE:

• Use the proper bit for the head of the screw/bolt that

you wish to use.

• When fastening screw M8 or smaller, carefully adjust

pressure on the switch trigger so that the screw is not

damaged.

• Hold the tool pointed straight at the screw.

• If you tighten the screw for a time longer than shown in

the figures, the screw or the point of the driver bit may

be overstressed, stripped, damaged, etc. Before start-

ing your job, always perform a test operation to deter-

mine the proper fastening time for your screw.

CAUTION:

• If the tool is operated continuously until the battery car-

tridge has discharged, allow the tool to rest for 15 min-

utes before proceeding with a fresh battery.

The fastening torque is affected by a wide variety of fac-

tors 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. Driver bit or socket bit

Failure to use the correct size driver bit or socket bit

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 manner of holding the tool or the material of

driving position to be fastened will affect the torque.

5. Operating the tool at low speed will cause a reduc-

tion in the fastening torque.

Hammer drilling operation

CAUTION:

• There is tremendous and sudden twisting force exerted

on the tool/bit at the time of hole breakthrough, when

the hole becomes clogged with chips and particles, or

when striking reinforcing rods embedded in the con-

crete.

To drill in the concrete or tiles, first, turn the action mode

changing lever so that the arrow on the lever points to the

mark on the tool body. The adjusting ring can be

aligned in any torque levels for this operation.

Be sure to use a tungsten-carbide tipped bit.

Position the bit at the desired location for the hole, then

pull the trigger.

Do not force the tool. Light pressure gives best results.

Keep the tool in position and prevent it from slipping away

from the hole.

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 partially from the hole. By

repeating this several times, the hole will be cleaned out

and normal drilling may be resumed.

CAUTION:

• If the tool is operated continuously until the battery car-

tridge has discharged, allow the tool to rest for 15 min-

utes before proceeding with a fresh battery.

Screwdriving operation (Fig. 18)

CAUTION:

• Adjust the adjusting ring to the proper torque level for

your work.

When driving small wood screws or machine screws, set

the action mode changing lever to the mark. Adjust

the adjusting ring to the proper torque level for your work.

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

apply pressure to the tool. Start the tool slowly and then

increase the speed gradually. Release the switch trigger

as soon as the clutch cuts in.

CAUTION:

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

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

• If the tool is operated continuously until the battery car-

tridge has discharged, allow the tool to rest for 15 min-

utes before proceeding with a fresh battery.

NOTE:

• When driving wood screws, predrill pilot holes to make

driving easier and to prevent splitting of the workpiece.

See the chart.

Drilling operation

First, set the action mode changing lever so that the

pointer points to the mark or the mark. The

mark is for low speed rotation and the mark is for

high. The adjusting ring can be aligned in any torque lev-

els for this operation. Then proceed as follows.

Before operation, always make sure that the lever is cor-

rectly set to your desired mode mark and use the tool at

an appropriate speed for your work.

Then proceed as follows.

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.

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

4.8 3.1 – 3.4

5.1 3.3 – 3.6

5.5 3.7 – 3.9

5.8 4.0 – 4.2

6.1 4.2 – 4.4

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