Bosch Professional GNA 18V-16 Manual page 6

OBJ_BUCH-3277-001.book Page 6 Tuesday, July 11, 2017 1:42 PM
6 | English
The lithium-ion battery is protected against deep discharging
by the "Electronic Cell Protection (ECP)". When the battery is
empty, the machine is switched off by means of a protective
circuit: The inserted tool no longer rotates.
 Do not continue to press the On/Off switch after the
machine has been automatically switched off. The bat-
tery can be damaged.
Removing the battery
The battery 1 is equipped with two locking levels that should
prevent the battery from falling out when pushing the battery
unlocking button 2 unintentionally. As long as the battery is
inserted in the power tool, it is held in position by means of a
spring.
To remove the battery 1, press the battery unlocking button 2
and pull the battery upward out of the power tool. Do not
exert any force.
Battery Charge-control Indication (see figure A)
The three green LEDs of the battery charge-control indicator
7 indicate the charge condition of the battery 1. For safety
reasons, it is only possible to check the status of the charge
condition when the machine is at a standstill.
Press button 6 to indicate the charge condition. This is also
possible when the battery 1 is removed.
LED
Continuous lighting 3 x green
Continuous lighting 2 x green
Continuous lighting 1 x green
Flashing light 1 x green
When no LED lights up after pushing button 6, then the bat-
tery is defective and must be replaced.
Operation
Starting Operation
Inserting the battery
 Use only original Bosch lithium-ion batteries with the
voltage listed on the nameplate of your power tool. Using
other batteries can lead to injuries and pose a fire hazard.
Insert the charged battery 1 into the base of the power tool
until the battery is securely locked.
Switching On and Off
To start the machine, push the On/Off switch 3 forward so
that the "I" is indicated on the switch.
To switch off the machine, push the On/Off switch 3 toward
the rear so that the "0" is indicated on the switch.
1 609 92A 3U8 | (11.7.17)
Changing the Cutting Direction
For changing the cutting direction, the die holder 9 can be
turned to three positions, each offset by 90°. Cutting toward
the rear (toward the housing of the machine) is not possible.
For turning the die holder 9 loosen the screw 4 until you can
turn the die holder. Turn it 90 ° to the right or the left in rela-
tion to the longitudinal axle of the power tool.
Make sure that the screw 4 engages into the borehole of the
die holder 9. Tighten the screw 4.
Working Advice
 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 downward motion of the punch.
Guide the machine evenly and with moderate feed in the cutting
direction. A high feed rate significantly reduces the service life
of the cutting tools and can damage the machine.
The machine operates more quietly when it is raised slightly
during cutting. If the punch should become wedged during
cutting, switch the machine off, relubricate the punch and re-
lease the tension of the steel sheet. Do not exert force, other-
wise the punch and the 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
Capacity
Steel
2/3
1/3
<1/3
Aluminium
Reserve
Lubricating/Cooling the Punch
To increase the service life of the punch 10, you should use a
lubricant with good cooling function, e.g. cutting oil
2 607 001 409.
Apply a trail of lubricant beads onto the top side of the metal
sheet alongside the intended cutting line.
Cutting along a Cutting Mark or with a Guide
Straight cuts are carried out easier when the machine is guid-
ed 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 21 mm is
necessary.
Temperature Dependent Overload Protection
If used in accordance with its intended use, the power tool
cannot be overloaded. If the power tool is overloaded or not
kept within the permitted battery temperature range, the
stroke rate is reduced or the power tool switches off. When
depends on
max
Max. strength property d
max
2
[N/mm ] [mm]
400 1,6
600 1,0
800 0,7
200 2,0
Bosch Power Tools