Bedienungsanleitung Bosch GNA 16 SDS Professional (Seite 10 von 112) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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1 619 929 J61 | (25.7.11) Bosch Power Tools

Changing the Cutting Direction

For changing the cutting direction, the die holder 4 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 4 loosen the screw 2 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 2 engages into the borehole of the

die holder 4. Tighten the screw 2.

Working Advice

f Before any work on the machine itself, pull the mains

plug.

f The power tool is not suitable for stationary operation.

For example, it may not be clamped in a vice or fastened on

a workbench.

f 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.

f 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 ma-

chine.

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

max

depends on

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:

Lubricating/Cooling the Punch

To extend the service life of the punch 3, 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 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.

Maintenance and Service

Maintenance and Cleaning

f Before any work on the machine itself, pull the mains

plug.

f For safe and proper working, always keep the machine

and ventilation slots clean.

Clean and lubricate the punch 3 and die 5 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 3 and the die 5 may not be reground.

Changing the Die

Unscrew the knurled screw 7 of the die holder 4. Take out the

die 5.

Il necessary, clean the die holder 4.

Put a new, well greased die 5 into the die holder. Pay attention

to the alignment of the flat side.

Tighten the knurled screw 7 again, the rubber ring placed on-

to it 6. Tighten the screw against the resistance of the rubber

ring.

Changing the Punch

Loosen the screw 2 and pull the die holder und 4 completely

out of the housing.

Push the punch 3 laterally out of the slot in the die holder 4

and pull it down and out.

Place a new, well greased punch 3 into the slot in the die hold-

er 4 and align it centrally.

Push the die holder 4 with caution over the punch 3 back into

the housing. Turn the die holder into one of the three possible

positions (see “Changing the Cutting Direction”, page 10).

Tighten the screw 2.

If the machine should fail despite the care taken in manufac-

turing and testing procedures, repair should be carried out by

an after-sales service centre for Bosch power tools.

In all correspondence and spare parts order, please always in-

clude the 10-digit article number given on the type plate of

the machine.

After-sales Service and Customer Assistance

Our after-sales service responds to your questions concern-

ing maintenance and repair of your product as well as spare

parts. Exploded views and information on spare parts can al-

so be found under:

www.bosch-pt.com

Material Max. strength property

[N/mm

]

max

[mm]

Steel

400 1.6

600 1.0

800 0.7

Aluminium

200 2.0

OBJ_BUCH-480-002.book Page 10 Monday, July 25, 2011 9:39 AM

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