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Basic speed setting at level
1
[min
Number of speed settings
3
You can use the mode button (12) to preselect the required
speed, but only when the power tool is not in operation.
Selecting the working mode
GDS 18V-350
The power tool has one predefined working mode: Auto-
matic shutdown (ABR).
Set the power tool to anticlockwise.
Press the mode button (12) to activate the automatic shut-
down (ABR) working mode.
If the automatic shutdown (ABR) working mode is activated,
the automatic shutdown indicator (ABR) (11) lights up.
When undoing nuts, press the on/off switch (7) as far as it
will go in order to trigger the automatic shutdown (ABR).
The previous setting is retained when the battery is changed.
Note: The automatic shutdown (ABR) indicator (11) lights
up only when the automatic shutdown (ABR) is switched on.
The power tool must rotate in an anticlockwise direction.
Note: The automatic shutdown (ABR) works only if bolts or
nuts are securely tightened. The on/off switch (7) must be
fully pressed.
Practical advice
The torque depends on the impact duration. The maximum
achieved torque results from the sum of all individual
torques achieved through impact. Maximum torque is
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
M8
6.57
8.7
M10
13
17.5
M12
22.6
30
M14
36
48
M16
55
73
M18
75
101
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.
Bosch Power Tools
achieved after an impact duration of 6–10 seconds. After
this duration, the tightening torque increases only minimally.
2
3
The impact duration is to be determined for each required
–1
–1
–1
] [min
] [min
]
tightening torque. The tightening torque actually achieved
should always be checked with a torque wrench.
Screw applications with hard, spring-loaded or soft seats
1200
1700
2300
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
– Lubrication conditions at the screw/bolt connection
The following application cases result accordingly:
– A hard seat is a metal-to-metal screw application which
– A spring-loaded seat is also a metal-to-metal screw ap-
– A soft seat is a screw application of e.g. metal on wood or
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
11
11.6
13.1
22
23
26
37.6
40
45
60
65
72
92
98
110
126
135
151
Temperature-dependent overload protection
In normal conditions of use, the power tool cannot be over-
loaded. In the event of overloading or exceeding of the per-
mitted rechargeable battery temperature, the power tool
automatically shuts off the electronics.
together
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.
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 screw application that uses lead washers or fibre wash-
ers as backing.
High-strength screws
5.8
6.8
6.9
8.8
14.6
17.5
19.7
23
29
35
39
47
50
60
67
80
79
95
107
130
122
147
165
196
168
202
227
270
1 609 92A 9DX | (07.05.2024)
English | 17
10.9
12.9
33
39
65
78
113
135
180
215
275
330
380
450
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