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Bosch Power Tools 1 609 929 U13 | (17.8.12)
Noise/Vibration Information
Measured noise values determined according
to EN 12549.
Typically the A-weighted noise levels of the pneumatic tool
are: Sound pressure le vel 96 dB(A); sound power level
110 dB(A). Uncertainty K = 2 dB.
Wear hearing protection!
Vibration total values a
h
and uncer tainty K de termined ac-
cording to EN ISO 20643: a
h
< 2.5 m/s
2
, K = 1.5 m/s
2
.
Declaration of Conformity
We declare under our sole responsibility that the product
described under “Technica l Data” is in conformity with the
following standards or standardization documents:
EN 792 according to the provisions of the directive
2006/42/EC.
Technical file (2006/42/EC) at:
Robert Bosch GmbH, PT/ETM9,
D-70745 Leinfelden-Ech terdingen
Robert Bosch GmbH, Power Tools Division
D-70745 Lein felden-Echte rdingen
Leinfelden, 16.08.201 2
Assembly
Connecting the Air Supply (see figure A)
Make sure that the pressure of the compr essed-air system
is below the maximum permitted rated pressur e of the
pneumatic tool. Firstly, set the air pressur e to the lower
value of the recommended rated pres sure (see “Technical
Data”).
When in doubt, check the pressure at the air inlet with a
pressure gauge with the pneumatic tool switched on.
For maximum performance, the values for the supply-air
hose 17 (connection thread, maximum operating pres-
sure, inner hose diameter, maximum hose length; see
“Technical Data”) mus t be observed.
The compressed air supp lied should be free of foreign ma-
terial and moisture to protect the tool from damage, con-
tamination, and the formation of rust.
All fittings, connecting lines and h oses must be dimen-
sioned for the pressure and the required air volume.
Avoid restrictions in the air supply, e. g., from pinching ,
kinking, or stretching!
Connecting the Air Supply to the Pneumatic Tool
– Empty the magazine 8.
(See “Emptying t he Magazine”, page 15)
For the following worksteps, a fa stener can be dis-
charged when interior parts of the pneumatic tool are
not in the starting position due to repairs, maintenance
or transport.
– Connect the air connector 6 with a supply-air hose 17
equipped with an air-conne ction coupling 16.
– Check the proper function by placing the outlet 13 or
the rubber workpiece pr otector 1 of the pneumatic tool
onto a piece of scrap wood or wood material, and d is-
charging once or twice.
Loading the Ma gazine
Disconnect the air supply before making
any adjustments, changing ac cessories,
or placing the pneumatic tool aside. This
safety measure prevents accidental start-
ing of the pneumatic tool.
f Use only ori ginal Bosch accessories (s ee “Technical
Data”). The precision parts of the pn eumatic tool such
as the magazine, the outlet and th e shot du ct are
matched to Bosch staples, nails and br ads. Other man-
ufacturers use other steel qualities and sizes.
Using fasteners not permitted, can damage the pneu-
matic tool and cause injuries.
While loadi ng the ma gazine, ho ld the pne umatic too l in
such a manner that the outlet 13 is not pointed at your own
body or at other persons.
GTK 40 (see figures B1 – B2)
– Pull b ack the magazine slider 11 until the button of mag-
azine-slider lock 7 fully engages.
– Clean and lubricate the magazi ne slider 11 as required
and make sure that the magazine 8 is not dirty/soiled.
– Place a fitting strip of staples 18 over maga zine 8.
The stapl e heads m ust fac e complete ly flush against the
surface of the magazine and the staple strips must move
easily in the magazine.
– Lightly p ull back magazine slider 11 and press the but-
ton of magazine-slider lock 7 inward.
– Carefully guide the magazine slider to the front until it
touches the staple s trip.
Note: Do not let the magazine slider snap back without
guiding it. Otherwise, the magazine slider could become
damaged, and ther e is danger of your finger s being caught
or pinched .
GSK 50 (see figures C1 – C2)
– Press magazine lock 14 and a t t he sa me ti me pu ll mag a-
zine 8 toward the rear to the stop.
– Clean and lubricate magazine rail 20 as require d.
– Insert a fitting nail strip 19.
If possible, the nail tip should to uch the magazine rail
20.
– Slide the nail strip in the magazine all the way to the
front.
– Insert the magazine until magazine lock 14 engage s
again.
Refill the magazine when the red bars of refill indicator 15
can be seen halfway.
Operation
Actuation systems
The pneumatic too l can be operated with two different ac-
tuations syst ems:
– Single a ctuation with safety run
With this actuation system, the discharge lock-off 2
must first be firmly pre ssed against t he workpiec e. A
fastener is not discharged unti l the trigger 10 is pulled.
Afterwards, further disc harging procedures can only be
actuated, when the trigger and the discharge lock -off
have first bee n set back to the starti ng positio n.
– Co ntact actuation
With this actuation system, the trigger 10 must be
pulled first. A fastener is always discharged w hen the
discharge lock-off 2 is firmly pr essed agai nst the work-
piece while the trigger is pressed.
This enables a higher working speed to be achieve d.
The actuation system is set via the selector switch 9.
Starting Operation
Disconnect the air supply befor e making
any adjustments, changing accessories,
or placing the pneumatic tool aside. This
safety measure prevents accide ntal start-
ing of the pneumatic tool.
Working with Single Actuation (see figure D)
– Press selector switch 9 inward and at the same time piv-
ot it to the bottom position until it engages.
The actuation system “single
actuation” is set.
– Release the selector switch 9 again.
– Firmly position the out let 13 or the rubber workpiece
protector 1 on the workpiece until discharge lock-off 2
is pressed i n complete ly.
– Afterwards, briefly press trigger 10 and rele ase again .
A staple (GTK 40) or a brad (GSK 50 ) is discharged.
– Allow the pneum atic tool to bounce back f rom the work-
piece.
– For a nother driving procedure, completely lift the pneu-
matic tool f rom the work piece and pos ition it fi rmly at
the next desired location.
Working with Contact Actuation (see figure E)
– Press selector switch 9 i n w a rd an d a t t he s a m e t i m e p iv -
ot it to the upper position until it engages.
The actuation system
“contact actuation” is
set.
– R elease the selector switch 9 again.
– Press an d hold the trigger 10.
– Firmly position the outlet 13 or the rubb er workpiece
protector 1 on the workpiece unt il discharge lock-off 2
is pressed in completely.
A staple (GTK 40) or a brad (GSK 50) is disc harged.
– A llow the pneumatic tool to bounce back from the work-
piece.
– F or another driving proced ure, complete ly lift the pneu-
matic tool from the workpiece and position it firmly at
the next desired location.
– M ove the pneumatic tool uniformly over the workpiece
by lifting it off and applying it again.
Each time when applying the pneumatic tool while the
discharge lock-off is p ressed in, a staple (GTK 40) or a
brad (GSK 50) is discharged.
– A s soon as the desired amount of staples (GTK 40) o r
brads (GSK 50) have been driven in, release trigge r 10
again.
Working Ad vice
Disconnect the air supply before making
any adjustments, changing accessories,
or placing the pneumatic tool aside. This
safety measure preven ts accidental start-
ing of the pneumatic tool.
Check the proper function of the safety and actuation de-
vices, and the tight seating of all screws and nuts each time
before using.
Disconnect a defective or n ot properly op erating pneumat-
ic tool immediately from of the air supply and contact a n
authorised se rvice agent for Bo sch power tools.
Do not perform any inco rrect manipulations on the pneu-
matic tool. Do not disassemble or block any components of
the pneumati c tool, such as the discharg e lock-off.
Do not carry out “emergency repairs” with unsuitable
means. T he pneumat ic tool is to be maintained r egularly
and properly (see “Mainte nance and Cleaning”, page 16).
Avoid any weakening and damage whatsoever of the pneu-
matic to ol, e.g., t hrough:
– Imprinting or engraving,
– R etrofitting measures not approved by the manufactur-
er,
– Guiding along templates manufact ured of hard m aterial,
e.g. steel ,
– D ropping on or sliding over the floor,
– U sing as a hammer,
– A pplying any kind of force.
Make sure to check whatever is below or behind your work-
piece. Do not shoot st aples (GTK 40) or brads (GSK 50) in-
to walls, ceilings or floors, when persons a re behind them.
The fasteners can burst through the wor kpiece and injure
someone.
Do not shoot a staple (GTK 40 ) or brad (GSK 50) on al-
ready driven-in fasteners. This c ould cause the fastener to
deform, the fasteners coul d become jammed or the pneu-
matic to ol could move unco ntrolled .
When the pneumatic tool is used under cold a mbient con-
ditions, the first staples (GTK 40) or br ads (GSK 50) are
driven in slo wer than us ual. Once the pneumatic tool has
warmed up during wor king, normal operat ing speed wil l be
regained.
Avoid blank shots in order to reduce the wear of the impact
striker.
For longer work breaks or after finishing work, d isconnect
the pneumatic tool from the air supply and empty the mag-
azine.
Emptying the Magazine
GTK 40
– Pull back the magazine slider 11 until the button of mag-
azine-slider lock 7 fully engages.
– R emove staple strip 18.
Dr. Egbert Schneider
Senior Vice President
Engineering
Helmut Heinzelma nn
Head of Product Certification
PT/ETM9
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