Bedienungsanleitung Bosch GDS 10.8 V-EC Professional (Seite 16 von 202) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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16 | English

2 609 141 290 | (16.6.15) Bosch Power Tools

Switching On and Off

To start the machine, press the On/Off switch 10 and keep it

pressed.

To switch off the machine, release the On/Off switch 10.

To save energy, only switch the power tool on when using it.

Adjusting the Speed

The speed of the switched-on power tool can be variably ad-

justed, depending on how far the On/Off switch 10 is

pressed.

Light pressure on the On/Off switch 10 results in a low rota-

tional speed. Further pressure on the switch results in an in-

crease in speed.

Preselecting the Speed/Impact Rate

With the button 6 you can preselect the required speed/im-

pact rate in 2 stages. Press the button 6 repeatedly until the

desired setting appears in the speed indicator 5. The selected

setting will be saved.

The required speed/impact rate depends on the material and

the working conditions, and can be determined through prac-

tical testing.

Switching the “PowerLight” On/Off

To switch the “PowerLight” 3 on, press button 4. To switch

the “PowerLight” 3 off, press button 4 again.

Battery Charge-control Indication

The battery charge-control indicator 11 consists of three

green LEDs, and indicates the charge condition of the battery

for a few seconds when the On/Off switch 10 is pressed half-

way or fully.

Temperature Dependent Overload Protection

In normal conditions of use, the power tool cannot be over-

loaded. If the power tool is overloaded or not kept within the

permitted battery temperature range, the power output is re-

duced or the power tool is switched off. The power tool will

not run at full power output again until the permitted battery

temperature has been reached.

Working Advice

 Apply the power tool to the screw/nut only when it is

switched off. Rotating tool inserts can slip off.

The torque depends on the impact duration. The maximum

achieved torque results from the sum of all individual torques

achieved through impact. The maximum torque is achieved

after an impact duration of 6–10 seconds. After this dura-

tion, the tightening torque is increased only minimally.

The impact duration is to be determined for each required

tightening torque. The actually achieved tightening torque is

always to be checked with a torque wrench.

Screw Applications with Hard, Spring-loaded or Soft Seat

A test in which the achieved torques in an impact series are

measured and transferred to a diagram will produce the curve

of a torque characteristic. The height of the curve corre-

sponds with the maximum reachable torque, and the steep-

ness indicates the duration in which this is achieved.

A torque gradient depends on the following factors:

– Strength properties of the screws/nuts

– Type of backing (washer, disc spring, seal)

– Strength properties of the material being screwed/bolted

together

– Lubrication conditions at the screw/bolt connection

The following application cases result accordingly:

–A hard seat is given for metal-to-metal screw applications

with the use of washers. After a relatively short impact du-

ration, the maximum torque is reached (steep characteris-

tic curve). Unnecessary long impact duration only causes

damage to the machine.

–A spring-loaded seat is given for metal-to-metal screw ap-

plications, however with the use of spring washers, disc

springs, studs or screws/nuts with conical seat as well as

when using extensions.

–A soft seat is given for screw applications, e. g., metal on

wood or when using lead washers or fibre washers as back-

ing.

For a spring-loaded seat as well as for a soft seat, the maxi-

mum tightening torque is lower than for a hard seat. Also, a

clearly longer impact duration is required.

Reference Values for Maximum Screw/Bolt Tightening Torques

Calculated from the tensional cross-section; utilization of the yield point 90 % (with friction coefficient µ

total

= 0.12). As a control

measure, always check the tightening torque with a torque wrench.

LED Capacity

Continuous lighting 3 x green ≥ 2/3

Continuous lighting 2 x green ≥ 1/3

Continuous lighting 1 x green < 1/3

Flashing light 1 x green Reserve

Property Classes accord-

ing to DIN 267

Standard Screws/Bolts High-strength Bolts

3.6 4.6 5.6 4.8 6.6 5.8 6.8 6.9 8.8 10.9 12.9

M 6

2.71 3.61 4.52 4.8 5.42 6.02 7.22 8.13 9.7 13.6 16.2

M 8

6.57 8.7 11 11.6 13.1 14.6 17.5 19.7 23 33 39

M 10

13 17.5 22 23 26 29 35 39 47 65 78

M 12

22.6 30 37.6 40 45 50 60 67 80 113 135

M 14

36 48 60 65 72 79 95 107 130 180 215

M 16

55 73 92 98 110 122 147 165 196 275 330

OBJ_BUCH-2221-002.book Page 16 Tuesday, June 16, 2015 9:46 AM

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