Starting Operation; Working Advice; Maintenance And Service; Maintenance And Cleaning - Bosch GNA 75-16 Professional Notice Originale

10 | English
This may significantly reduce vibration and noise emissions
over the total working period.
Implement additional safety measures to protect the oper-
ator from the effects of vibration, such as servicing the
power tool and application tools, keeping their hands warm,
and organising workflows correctly.
Operation
Products that are only sold in AUS and NZ: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.

Starting Operation

Pay attention to the mains voltage. The voltage of the
u
power source must match the voltage specified on the
rating plate of the power tool. Power tools marked
with 230 V can also be operated with 220 V.
Switching On and Off
To switch on the power tool, slide the on/off switch (1) for-
wards so that I appears on the switch.
To lock the on/off switch (1), push down on the front of the
switch as well.
To switch off the power tool, release the on/off switch (1).
When the on/off switch is locked, press down on the back of
the switch and then release it.
Changing the cutting direction
To change the cutting direction, the die holder (5) can be
turned to three positions, each offset by 90°. Cutting to-
wards the rear (towards the housing of the machine) is not
possible.
To turn the die holder (5), loosen the die holder screw (2)
until the die holder can be turned. Turn it 90° to the right or
the left in relation to the longitudinal axle of the power tool.
Make sure that the screw (2) engages in the drill hole of the
die holder (5). Tighten the screw.

Working Advice

Pull the plug out of the socket before carrying out any
u
work on the power tool.
This power tool is not suitable for bench-mounted use.
u
It must not be clamped into a vice or fastened to a work-
bench, for example.
Wear protective gloves during work and pay particu-
u
lar attention to the cord. Sharp burrs develop on the cut
sheets; these can cause injury or damage the cord.
Exercise caution when handling the cutting chips. The
u
chips have sharp tips that can cause injuries.
Apply the power tool to the workpiece only when switched
on. Always hold the power tool vertical to the surface of the
steel sheet and do not tilt it.
The cut is made as the punch moves downwards. Guide the
power tool evenly, pushing it gently in the cutting direction.
Applying too much pressure to the power tool will signific-
1 609 92A 508 | (24.06.2019)
antly reduce the service life of application tools and can
damage the power tool.
The power tool operates more quietly when it is raised
slightly during cutting. If the punch jams during cutting,
switch the power tool off, lubricate the punch and release
the sheet. Do not use force to do this, as this will damage the
punch and the die.
Maximum steel sheet cutting capacity
The maximum steel sheet cutting capacity d
the strength properties of the material to be cut.
The power tool allows for cutting of metal sheet to the follow-
ing thicknesses:
Material max. strength
(N/mm
Steel 400
600
800
Aluminium 200
Lubricating/cooling the punch
To extend the service life of the punch (6), a lubricating
agent with good cooling properties (e.g. cutting oil) should
be used.
Apply a line of lubricant to the top side of the metal sheet
along the intended cutting line.
Cutting along a cutting mark or with a guide
Straight cuts are carried out easier when the power tool is
guided alongside a rule.
Contours can be cut by guiding the power tool along a tem-
plate.
For inside cuts, a hole with a diameter of 21 mm must be
pre-drilled.

Maintenance and Service

Maintenance and Cleaning

Pull the plug out of the socket before carrying out any
u
work on the power tool.
To ensure safe and efficient operation, always keep
u
the power tool and the ventilation slots clean.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
Clean and lubricate the punch (6) and die (7) every three
operating hours.
Change the punch and die in good time when worn. Only
sharp tools produce a good cutting quality and make the
power tool last longer.
The punch (6) and the die (7) may not be resharpened.
Changing the die
Unscrew the knurled screw (9) from the die holder (5). Take
out the die (7).
depends on
max
d
max
2
) (mm)
1.6
1.0
0.7
2.0
Bosch Power Tools