Bosch GDS Professional 18V-450 HC Notice Originale page 19

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
µ = 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 13 17.5
M12 22.6 30
M14 36 48
M16 55 73
M18 75 101
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
22 23 26 29
37.6 40 45 50
60 65 72 79
92 98 110 122
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
Maintenance and Service
Maintenance and Cleaning
Clean the air vents on your power tool regularly. The
u
motor's fan will draw the dust inside the housing and ex-
cessive accumulation of powdered metal may cause elec-
trical hazards.
High-strength screws
6.8 6.9 8.8 10.9
35 39 47 65
60 67 80 113
95 107 130 180
147 165 196 275
202 227 270 380
286 320 385 540
1 609 92A 7YM | (31.05.2022)
English | 19
12.9
78
135
215
330
450
635