Maintenance And Service; Maintenance And Cleaning - Bosch GDS 18V-450 HC Professional Originalbetriebsanleitung

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tightening torque. The tightening torque actually achieved

should always be checked with a torque wrench.

Screw applications with hard, spring-loaded or soft seats

When the achieved torques in an impact series are measured

during a test and transferred into a diagram, the result is the

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

responds with the maximum reachable torque, and the

steepness 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

Guide values for maximum screw tightening torques

Figures given in Nm; calculated from the tensional cross-section; utilisation of the yield point: 90% (with friction coefficient

= 0.12). As a control measure, always check the tightening torque with a torque wrench.

total

Property classes

Standard screws

according to DIN

3.6

4.6

267

M10

17.5

M12

22.6

M14

M16

M18

101

M20

107

143

Tips

Before screwing larger, longer screws into hard materials, it

is advisable to pre-drill a pilot hole with the core diameter of

the thread to approx. 2/3 of the screw length.

Note: Ensure that no metal particles enter the power tool.

After working at a low speed for an extended period, you

should operate the power tool at the maximum speed for ap-

proximately three minutes without load to cool it down.

Recommendations for optimal handling of the battery

Protect the battery against moisture and water.

Only store the battery within a temperature range of -20 to

50 °C. Do not leave the battery in your car in the summer, for

example.

A significantly reduced operating time after charging indic-

ates that the battery has deteriorated and must be replaced.

Follow the instructions on correct disposal.

Belt clip

You can use the belt clip (4) to hang the power tool on a belt,

for example. You then have both hands free and the power

tool is always at hand.

Control Via App

The power tool can be fitted with a Bluetooth® module which

enables wireless data transfer to certain mobile devices with

a Bluetooth® interface (e.g. smartphone, tablet).

Bosch Power Tools

The following application cases result accordingly:

– A hard seat is a metal-to-metal screw application which

uses washers. After a relatively short impact duration, the

maximum torque is reached (steep characteristic curve).

Unnecessary long impact duration only causes damage to

the machine.

– A spring-loaded seat is also a metal-to-metal screw ap-

plication but uses spring washers, disc springs, studs or

screws/nuts with conical seats. It is also called a spring-

loaded seat when extensions are used.

– A soft seat is a screw application of e.g. metal on wood or

a screw application that uses lead washers or fibre wash-

ers as backing.

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

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

clearly longer impact duration is required.

5.6

4.8

6.6

5.8

37.6

110

122

126

135

151

168

178

190

214

238

In order to control the power tool via Bluetooth®, you will

need the "Bosch Toolbox" app. Download the app from the

corresponding app store (Apple App Store, Google Play

Store).

Then select the "My Tools" sub-item in the app. The display

of your mobile terminal device will show you all subsequent

steps required to connect the power tool to the terminal

device.

The following functions will be available when a connection

has been established with the mobile device:

– Registration and personalisation

– Status check, output of warning messages

– General information and settings

– Management

– Setting the speed levels

– Setting the working modes