Bosch GNA 2,0 Professional Original Instructions Manual page 10

OBJ_BUCH-236-003.book Page 10 Thursday, March 27, 2014 7:49 PM
10 | English
Declaration of Conformity
We declare under our sole responsibility that the product de-
scribed under "Technical Data" is in conformity with the fol-
lowing standards or standardization documents: EN 60745
according to the provisions of the directives 2011/65/EU,
2004/108/EC, 2006/42/EC.
Technical file (2006/42/EC) at:
Robert Bosch GmbH, PT/ETM9,
D-70745 Leinfelden-Echterdingen
Henk Becker Helmut Heinzelmann
Executive Vice President Head of Product Certification
Engineering PT/ETM9
Robert Bosch GmbH, Power Tools Division
D-70745 Leinfelden-Echterdingen
Leinfelden, 24.02.2014
Operation
Starting Operation
 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Switching On and Off
To start the machine, push the On/Off switch 1 forward so
that the "I" is indicated on the switch.
To switch off the machine, push the On/Off switch 1 toward
the rear so that the "0" is indicated on the switch.
To save energy, only switch the power tool on when using it.
Locking/Loosening the Die
For straight cuts, tighten the locking screw 3 using an Allen
key (size 2.5 mm) in order to lock the die 4.
For curved cuts, loosen the locking screw 3. The die 4 can
move freely now and adjusts to the direction of the feed
strength.
Working Advice
 The power tool is not suitable for stationary operation.
For example, it may not be clamped in a vice or fastened on
a workbench.
 Wear protective gloves while working and pay particu-
lar attention to the mains cable. Sharp burrs develop at
the cut steel sheet and can cause injuries to the operator or
damage the mains cable.
 Exercise caution when handling the cutting chips. The
chips have sharp tips that can cause injuries.
Apply the machine to the workpiece only when switched on.
Always hold the machine vertical to the surface of the steel
sheet and do not tilt it.
The cut takes place during the upward motion of the punch.
Guide the machine evenly and with moderate feed in the cut-
ting direction. A too high feed rate significantly reduces the
service life of the cutting tools and can damage the machine.
3 609 929 C95 | (27.3.14) 24.3.14
If the punch should become wedged during cutting, switch
the machine off, relubricate the punch and release the ten-
sion of the steel sheet. Do not exert force, otherwise the
punch and die will become damaged.
Maximum Steel Sheet Cutting Capacity
The maximum steel sheet cutting capacity d
the strength properties of the material to be cut.
The machine allows for straight and deformation-free cutting
of metal sheets to the following thicknesses:
Material Max. strength property
2
[N/mm ]
Steel 400
600
800
Aluminium 200
Lubricating/Cooling the Punch
To extend the service life of the punch 5, a lubricating agent
with good cooling properties (e.g. cutting oil) should be used.
Apply a trail of lubricant beads onto the top side of the metal
sheet alongside the intended cutting line. For long periods of
continual use or for work with high frictional wear (e.g. when
cutting aluminium), the cutting head should be immersed into
a container with lubricant in regular intervals.
Cutting along a Cutting Mark or with a Guide
Straight cuts are carried out easier when the machine is
guided alongside a rule.
Contours can be cut by guiding the machine along a template.
For inside cuts, pre-drilling a hole with a diameter of 16 mm is
necessary.
Maintenance and Service
Maintenance and Cleaning
 Before any work on the machine itself, pull the mains
plug.
 For safe and proper working, always keep the machine
and ventilation slots clean.
Clean and lubricate the punch 5 and die 4 every 3 operating
hours.
Change the punch and die in good time when worn. Only
sharp tools produce a good cutting quality and make the ma-
chine last longer.
The punch 5 and the die 4 may not be reground.
Changing the Die
When the die is locked, loosen the locking screw 3 (see "Lock-
ing/Loosening the Die", page 10).
Unscrew the screwed cap 2 using an open-end spanner (size
30 mm). Pull the die 4 off.
Insert a new, well lubricated die 4. Tighten the screw cap 2
again.
depends on
max
d
max
[mm]
2.0
1.4
1.0
2.5
Bosch Power Tools