Product Description And Specifications; Intended Use; Product Features - Bosch DBH 740 R Notice Originale

OBJ_BUCH-2092-002.book Page 14 Thursday, February 23, 2017 11:46 AM
14 | English
 If you notice that the skin of your fingers or hands be-
comes numb, tingles, hurts or turns white, stop work-
ing with the pneumatic tool, notify your employer and
consult a physician.
 Do not hold the application tool while working.
 Hold the pneumatic tool with a not too firm yet secure
grip, compliant with the required hand-reaction forces.
The vibrations can be intensified the firmer you hold the
tool.
 When universal rotary couplings (bayonet couplings)
are being used, retaining pins are required. Use Whip-
check hose restraints to protect against failed hose
connections or the connection between hose and pneu-
matic tool.
 Never carry the pneumatic tool by the hose.
 Switch the pneumatic tool off immediately when the
application tool locks up. Be prepared for high reaction
torque that lead to kickback. The application tool locks-
up when:
– the pneumatic tool is subject to overload,
– it jams or cants in the workpiece or
– its tip goes through the material being worked.
 Use auxiliary aids to absorb reaction torque, such as a
supporting fixture. If this is not possible, use an auxilia-
ry handle.
 Never place your hand near rotating application tools.
You could injure yourself.
 Do not allow the drill bit to rattle on the workpiece. This
can lead to significant intensification of the vibrations.
Symbols
The following symbols could have a meaning for the use of
your pneumatic tool. Please take note of the symbols and
their meaning. The correct interpretation of the symbols will
help you to use the pneumatic tool in a better and safer man-
ner.
Symbol Meaning
 Before installing, operating, re-
pairing, maintaining and replacing
accessories as well as prior to
working near by the pneumatic
tool, please read and observe all in-
structions. Failure to follow the fol-
lowing safety warnings and instruc-
tions may result in serious injury.
 Wear ear protectors. Exposure to
noise can cause hearing loss.
 Wear safety goggles.
1 609 92A 33X | (23.2.17)
Symbol Meaning
W Watt
Nm Newton metre
kg Kilogram
lbs Pounds
mm Millimetre
min Minutes
s Seconds
Revolutions or motions per
-1
min
minute
bar bar
psi pounds per square inch
l/s Litres per second
cfm cubic feet/minute
dB Decibel
QC Quick-change chuck
Symbol for hexagon socket

Symbol for external drive
US fine thread
UNF (Unified National Fine
Thread Series)
G Whitworth thread
NPT National pipe thread
Product Description and Specifica-
tions
Read all safety warnings and all instruc-
tions. Failure to follow the warnings and in-
structions may result in electric shock, fire
and/or serious injury.
While reading the operating instructions, unfold the fold-out
page with the illustration of the pneumatic tool and leave it
open.

Intended Use

The pneumatic tool is intended for hammer drilling in con-
crete, bricks and masonry, as well as for light chiselling work.
It is also suitable for drilling without impact in wood, metal,
ceramic and plastic.
The rotary hammer is suitable for use in wet and damp rooms
and for outdoor jobsites.

Product Features

The numbering of the product features refers to the illustra-
tion of the pneumatic tool on the graphics page.
1 Tool holder
2 Dust protection cap
3 Locking sleeve
4 Wing bolt for adjustment of auxiliary handle
Power output
Unit of energy
(torque)
Mass, weight
Length
Time period,
duration
No-load speed
Air pressure
Air consumption
Unit of relative
loudness
Tool holder
Connecting thread
Bosch Power Tools