Bosch GDS 18 E 0.601.444.000 Инструкция по эксплуатации онлайн [17/219] 2621

Bosch GDS 18 E 0.601.444.000 Инструкция по эксплуатации онлайн [17/219] 2621
English | 17
Bosch Power Tools 1 609 929 Y31 | (8.2.11)
The following application cases result accord-
ingly:
–A hard seat is given for metal-to-metal screw
applications with the use of washers. After a
relatively short impact duration, the maxi-
mum torque is reached (steep characteristic
curve). Unnecessary long impact duration
only causes damage to the machine.
–A spring-loaded seat is given for metal-to-
metal screw applications, 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 backing.
For a spring-loaded seat as well as for a soft
seat, the maximum tightening torque is lower
than for a hard seat. Also, a clearly longer im-
pact 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 coeffi-
cient μ
total
= 0.12). As a control measure, always check the tightening torque with a torque wrench.
Tips
Torque rods have shanks with precisely calibrat-
ed, reduced diameters. Thus, they act torque-
limiting. A torque rod is placed between the im-
pact wrench and the bit.
Rule of thumb for the application: Core diame-
ter of the screw/bolt = effective diameter of the
torque rod. The impact duration is to be deter-
mined through practical testing.
The thumbwheel 6 must be set to max.
For hanging up, a suspension hook 3 is mounted
at the machine's centre of gravity.
At temperatures below the freezing point, run
the machine for approx. 3 minutes at no-load to
improve its lubricating capacity.
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
M6
2.71 3.61 4.52 4.8 5.42 6.02 7.22 8.13 9.7 13.6 16.2
M8
6.57 8.7 11 11.6 13.1 14.6 17.5 19.7 23 33 39
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
M16
55 73 92 98 110 122 147 165 196 275 330
M18
75 101 126 135 151 168 202 227 270 380 450
M20
107 143 178 190 214 238 286 320 385 540 635
OBJ_BUCH-544-002.book Page 17 Tuesday, February 8, 2011 1:09 PM

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