English |
21
Status indicator for power
tool (11)
Meaning/cause
Solution
Flashing blue
Power tool is connected to a mobile device or
settings are being transferred
–
Speed preselection
With the speed preselection button
(16)
, you can preselect
the required speed in three stages. Press button
(16)
as of-
ten as needed until the required setting is indicated in the
speed indicator
(17)
. The selected setting will be saved.
GDS 18V-1000 C / GDS 18V-1050 HC:
You can also preselect the speed using the Bosch Toolbox
app.
The required speed depends on the material and the work-
ing conditions; it can be ascertained through practical tests.
The information in the table below describes the recommen-
ded values.
Basic speed setting at level
1
2
3
[min
-1
]
[min
-1
]
[min
-1
]
Number of speed settings
3
0–1 100 0–2 300 0–3 400
You can use the button for speed preselection
(16)
to
preselect the required speed, even during operation.
Switching On the Worklight
GDS 18V-1000 / GDS 18V-1050 H:
To switch the worklight
(15)
on or off, press the worklight
button
(13)
.
u
Do not look directly into the worklight; it can blind
you.
Selecting the working mode
GDS 18V-1000 C / GDS 18V-1050 HC:
The power tool has two preset working modes
A
and
B
(12)
.
You can also programme working modes for different applic-
ations and adjust existing modes via the Bosch Toolbox un-
der
A
and
B
(12)
.
To switch between the working modes
A
and
B
(12)
, press
button
(14)
.
Practical advice
u
Only apply the power tool to the screw/nut when the
tool is switched off.
Rotating tool inserts can slip off.
u
The power tool with inserted
Bluetooth
®
Low Energy
Module
GCY 42 (accessory) is equipped with a radio
interface. Local operating restrictions, e.g. in aircraft
or hospitals, must be observed.
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
achieved after an impact duration of 6–10 seconds. After
this duration, the tightening torque increases only minimally.
The impact duration is to be determined for each required
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
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.
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
total
= 0.12). As a control measure, always check the tightening torque with a torque wrench.
Property classes
according to DIN
267
Standard screws
High-strength screws
3.6
4.6
5.6
4.8
6.6
5.8
6.8
6.9
8.8
10.9
12.9
M10
13
17.5
22
23
26
29
35
39
47
65
78
M12
22.6
30
37.6
40
45
50
60
67
80
113
135
M14
36
48
60
65
72
79
95
107
130
180
215
Bosch Power Tools
1 609 92A 6HU | (10.05.2021)
