Bedienungsanleitung Bosch GDX 14.4 V-LI (Seite 17 von 206) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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English | 17

Bosch Power Tools 1 609 92A 0C4 | (19.9.13)

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.

Tips

Before screwing larger, longer screws into hard materials, it is

advisable to predrill a pilot hole with the core diameter of the

thread to approx.

of the screw length.

Note: Pay attention that no metal particles enter the power

tool.

Belt Clip

With the belt clip 4, the machine can be hung onto a belt. The

user has both hands free and the machine is always at hand.

Recommendations for Optimal Handling of the Battery

Protect the battery against moisture and water.

Store the battery only within a temperature range between

0 °C and 50 ° C. As an example, do not leave the battery in the

car in summer.

Occasionally clean the venting slots of the battery using a soft,

clean and dry brush.

A significantly reduced working period after charging indi-

cates that the battery is used and must be replaced.

Observe the notes for disposal.

Maintenance and Service

Maintenance and Cleaning

 Before any work on the machine itself (e. g. mainte-

nance, tool change, etc.) as well as during transport

and storage, remove the battery from the power tool.

There is danger of injury when unintentionally actuating

the On/Off switch.

 For safe and proper working, always keep the machine

and ventilation slots clean.

Replacing the Carbon Brushes (see figure E)

Check the length of the carbon brushes approx. every

2 –3 months and replace the carbon brushes if required.

Never replace only a single carbon brush!

Note: Use only carbon brushes supplied by Bosch and intend-

ed specifically for your product.

– Unscrew the caps 16 using a suitable screwdriver.

– Replace the spring-loaded carbon brushes 15 and screw

the caps back on again.

After-sales Service and Application Service

Our after-sales service responds to your questions concern-

ing maintenance and repair of your product as well as spare

parts. Exploded views and information on spare parts can al-

so be found under:

www.bosch-pt.com

Bosch’s application service team will gladly answer questions

concerning our products and their accessories.

In all correspondence and spare parts order, please always in-

clude the 10-digit article number given on the type plate of

the machine.

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-832-005.book Page 17 Thursday, September 19, 2013 1:55 PM

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