Bedienungsanleitung Bosch GNA 3.5 Professional (Seite 15 von 199) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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English | 15

Bosch Power Tools 1 609 929 X90 | (16.2.11)

Switching On and Off

To start the machine, push the On/Off switch 5

forwards.

To lock the On/Off switch 5, additionally push

down the front of the switch.

To switch off the machine, release the On/Off

switch 5. When the On/Off switch is locked,

press on the rear of the switch and then release

it.

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 work-

bench.

f 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.

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 mo-

tion 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, otherwise the punch and the die will be-

come damaged.

Maximum Steel Sheet Cutting Capacity

The maximum steel sheet cutting capacity d

max

depends on the strength properties of the mate-

rial to be cut.

The machine allows for straight and deforma-

tion-free cutting of metal sheets to the following

thicknesses:

Lubricating/Cooling the Punch

To extend the service life of the punch 10, 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 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 im-

mersed into a container with lubricant in regular

intervals.

Cutting along a Cutting Mark or with a Guide

The projection on the hold down guide 12

serves as a cutting mark after having made the

incipient crack.

Straight cuts are carried out easier when the

machine is guided alongside a rule.

For inside cuts, pre-drilling a hole with a diame-

ter of 41 mm is necessary.

Material Max. strength

property

[N/mm

]

max

[mm]

Steel 400 3.5

600 2.4

800 1.6

Aluminium 200 4.0

OBJ_BUCH-101-003.book Page 15 Wednesday, February 16, 2011 12:22 PM

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