Bosch PDR 18 LI 0.603.980.301 - Инструкция по эксплуатации - Страница 14

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1 609 92A 2SX | (28.6.16)

Bosch Power Tools

Adjusting the Speed

The speed of the switched-on power tool can be variably ad-
justed, depending on how far the On/Off switch 

6

 is pressed.

Light pressure on the On/Off switch 

6

 results in a low rotation-

al speed. Further pressure on the switch results in an increase 
in speed.

Temperature Dependent Overload Protection

When using as intended for, the power tool cannot be subject 
to overload. When the load is too high or the allowable battery 
temperature is exceeded, the electronic control switches off 
the power tool until the temperature is in the optimum tem-
perature range again.

Protection Against Deep Discharging

The lithium-ion battery is protected against deep discharging 
by the “Electronic Cell Protection (ECP)”. When the battery is 
empty, the machine is switched off by means of a protective 
circuit: The inserted tool no longer rotates.

Working Advice



Apply the power tool to the screw/nut only when it is 
switched off. 

Rotating tool inserts can slip off.

The torque depends on the impact duration. The maximum 
achieved torque results from the sum of all individual torques 
achieved through impact. The maximum torque is achieved 
after an impact duration of 6 – 10 seconds. After this dura-
tion, the tightening torque is increased only minimally.

The impact duration is to be determined for each required 
tightening torque. The actually achieved tightening torque is 
always to be checked with a torque wrench.

Screw Applications with Hard, Spring-loaded or Soft Seat

A test in which the achieved torques in an impact series are 
measured and transferred to a diagram will produce the curve 
of a torque characteristic. The height of the curve corre-
sponds with the maximum reachable torque, and the steep-
ness 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 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. 

2

/

3

 of the screw length.

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 power 
tool and the rechargeable battery clean.

When the battery is no longer operative, please refer to an au-
thorised after-sales service agent for Bosch power tools.

If the machine should fail despite the care taken in manufac-
turing and testing procedures, repair should be carried out by 
an after-sales service centre for Bosch power tools.

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 
according 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-2739-002.book  Page 14  Tuesday, June 28, 2016  8:54 AM