Maintenance And Service; Maintenance And Cleaning - Bosch GNA 2.0 Professional Original Instructions Manual

OBJ_BUCH-519-002.book Page 6 Wednesday, October 19, 2016 9:56 AM
6 | English
If the punch should become wedged during cutting, switch
the machine off, relubricate the punch and release the ten-
sion of the steel sheet. Do not exert force, otherwise the
punch and 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 Max. strength property
2
[N/mm ]
Steel 400
600
800
Aluminium 200
Lubricating/Cooling the Punch
To extend the service life of the punch 5, 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 16 mm is
necessary.

Maintenance and Service

Maintenance and Cleaning

 Before any work on the machine itself, pull the mains
plug.
 For safe and proper working, always keep the machine
and ventilation slots clean.
If the replacement of the supply cord is necessary, this has to
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.
Clean and lubricate the punch 5 and die 4 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 5 and the die 4 may not be reground.
Changing the Die
When the die is locked, loosen the locking screw 3 (see "Lock-
ing/Loosening the Die", page 5).
Unscrew the screwed cap 2 using an open-end spanner (size
30 mm). Pull the die 4 off.
Insert a new, well lubricated die 4. Tighten the screw cap 2
again.
1 609 92A 37Z | (19.10.16)
Changing the Punch
To change the punch 5, remove the die (see "Changing the
Die", page 6).
Unscrew the hollow screw 6 and remove the punch 5.
Insert a new, well lubricated punch 5 and tighten it with the
hollow screw 6. Fasten the die again (see "Changing the Die",
depends on
max
page 6).
Accessories/Spare Parts
Die 4 (universal) . . . . . . . . . . . . . . . . . . . . . . . 2 608 639 900
d
max
Punch 5:
[mm]
– For curved cuts . . . . . . . . . . . . . . . . . . . . 2 608 639 013
2.0
– For straight cuts . . . . . . . . . . . . . . . . . . . . 2 608 639 016
– Universal . . . . . . . . . . . . . . . . . . . . . . . . . 2 608 639 022
1.4
For corrugated and profiled sheet with a thickness to 1.2 mm:
1.0
– Die 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 608 639 021
2.5
– Set (punch 5/die 4) . . . . . . . . . . . . . . . . . 2 608 639 902
After-sales Service and Application Service
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
Bosch's application service team will gladly answer questions
concerning our products and their accessories.
In all correspondence and spare parts orders, please always
include the 10-digit article number given on the nameplate of
the product.
People's Republic of China
China Mainland
Bosch Power Tools (China) Co., Ltd.
567, Bin Kang Road
Bin Jiang District 310052
Hangzhou, P.R.China
Service Hotline: 4008268484
Fax: (0571) 87774502
E-Mail: contact.ptcn@cn.bosch.com
www.bosch-pt.com.cn
HK and Macau Special Administrative Regions
Robert Bosch Hong Kong Co. Ltd.
21st Floor, 625 King's Road
North Point, Hong Kong
Customer Service Hotline: +852 2101 0235
Fax: +852 2590 9762
E-Mail: info@hk.bosch.com
www.bosch-pt.com.hk
Bosch Power Tools