Starting Operation; Working Advice - Bosch GNA 2,0 Professional Original Instructions Manual

OBJ_BUCH-236-002.book Page 13 Monday, October 8, 2007 11:54 AM
Operation

Starting Operation

Observe correct mains voltage! The voltage
of the power 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 indi-
cated on the switch.
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 di-
rection of the feed strength.

Working Advice

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 cutting direction. A too high
feed rate significantly reduces the service life of
the cutting tools and can damage the machine.
If the punch should become wedged during cut-
ting, switch the machine off, relubricate the
punch and release the tension of the steel
sheet. Do not exert force, otherwise the punch
and die will become damaged.
Wear protective gloves while working and
pay particular 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.
Bosch Power Tools
Maximum Steel Sheet Cutting Capacity
The maximum steel sheet cutting capacity d
depends on the strength properties of the ma-
terial to be cut.
The machine allows for straight and deformation-
free cutting of metal sheets to the following
thicknesses:
Material Max. strength
property
[N/mm
Steel 400
600
800
Aluminium 200
Lubricating/Cooling the Punch
To extend the service life of the punch 5, a lubri-
cating 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 cut-
ting line. For long periods of continual use or for
work with high frictional wear (e.g. when cut-
ting 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 dia-
meter of 16 mm is necessary.
1 609 929 M22 | (8.10.07)
English | 13
max
d
max
2
] [mm]
2.0
1.4
1.0
2.5