Frank COBRA C Bedienungsanleitung
Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
© 2006
Reproduction on whole or in part requires written permission from
Hermann Frank GmbH & Co. KG, 75038 Oberderdingen, Germany.
All rights reserved.
No liability for any damage arising from the use of this brochure.
Subject to alterations.
Hermann Frank GmbH & Co. KG
Östliche Bahnhofstraße 8
75038 Oberderdingen
Germany
Tel.: +49 (0)72 58 / 60 88-0
Fax: +49 (0)72 58 / 60 88-11
www.hermannfrank.de
State: January 2006
3
This brochure uses the symbol to mark important instructions for safety and preventing damage.
Please give special attention to the marked instructions.
They refer to a potentially dangerous situation. Failure to comply can result in fatal or severe injuries and
damage to property.
Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
4
Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
Contents
1 Introduction.................................................................................................................................... 6
2 Scope of delivery........................................................................................................................... 7
3 Machine specifications COBRA C .............................................................................................. 8
3.1 Important components..................................................................................................................... 8
3.2 Technical data ................................................................................................................................. 9
3.3 Safety and machine protection facilities .......................................................................................... 9
4 Proper use...................................................................................................................................... 9
5 Installing the guide tube .............................................................................................................. 10
6 Disassembling for transport ........................................................................................................ 11
6.1 Removing the guide tube ............................................................................................................... 11
6.2 Removing the motor ........................................................................................................................ 12
7 Operating the COBRA C ............................................................................................................. 14
7.1 Protective clothing and equipment ................................................................................................ 14
7.2 Fitting the dust bag ....................................................................................................................... 15
7.3 Safety instructions regarding dust .................................................................................................. 16
7.4 Disposing of sanding dust ............................................................................................................. 17
7.5 Replacing the sanding belt ............................................................................................................ 18
7.6 Adjusting the sanding pressure ..................................................................................................... 19
7.7 Safety instructions for electric cable and connectors .................................................................... 20
7.8 Connecting the COBRA C to the mains power .............................................................................. 20
7.9 Remarks about sanding parquet and plank floors ......................................................................... 22
7.10 Sanding with the COBRA C ........................................................................................................... 25
8 Maintenance .................................................................................................................................. 30
8.1 Changing the sanding drum .......................................................................................................... 30
8.2 Adjusting the running wheels ......................................................................................................... 32
8.3 Adjusting the castor wheels ........................................................................................................... 34
8.4 Adjusting the tension roller ............................................................................................................. 35
8.5 Tightening the V-belts...................................................................................................................... 36
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9 Parts lists
......................................................................................................................................... 37
9.1 Parts list of chassis ......................................................................................................................... 37
9.2 Parts list of motor ............................................................................................................................ 42
9.3 Accessories ..................................................................................................................................... 44
Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
6
Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
1 Introduction
Dear customer,
you have decided in favour of the FRANK parquet floor sander COBRA C, the correct choice with
respect to quality and performance.
The COBRA C is the result of a consistent implementation of many years of experience.
This machine combines an extraordinary high sanding performance and an excellent sanding
quality, together with an easy to operate, proven and reliable technology.
This operating instructions contain important informations for the use and safe operation of the
COBRA C.
Caution!
Read these operating instructions carefully before assembling or operating the
COBRA C. Ensure that all operators read these operating instructions prior to operate the
machine.
Adherence to the safety notes helps to protect against potential dangers for health and
personal safety and to prevent an improper utilisation of the machine.
Before starting to work, make yourself familiar with the operation of the machine. It's too late
if you do it while working!
Never allow anybody without sufficient skills and knowledge to operate the machine.
Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
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2 Scope of delivery
1 guide tube
2 dust bag
3 cable with plug and coupling
4 lower part of the machine with motor
5 wing screws (2 pieces)
6 operating instructions
7 hexagon socket screw key 5 mm
8 hexagon socket screw key 6 mm
9 hexagon socket screw key 10 mm
10 running wheel adjusting tool
11 tool pouch
12 fork wrench 10 mm
13 fork wrench 13 mm
14 fork wrench 24 mm
15 double fork wrench 30/36 mm
16 hearing protectors
17 respirator
18 Multiclip
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Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
3 Machine specifications COBRA C
3.1 Important components
1 pressure regulating screw 11 bumper wheel
2 castor wheels 12 belt guard
3 running wheels 13 motor
4 drum cover 14 switch box
5 V-belt tension screw 15 dust bag
6 tension lever 16 cable arm
7 knurled nut 17 left hand grip
8 clamping lever 18 main lifting lever
9 motor plug 19 right hand grip
10 carrying handle 20 gentle lifting lever
Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
9
3.2 Technical data
Single-phase AC motor 230 V, 50 cps
Motor power 2500 W
Sanding drum speed 2100 rpm
Sanding width 200 mm
Sanding belt dimensions 200 mm x 750 mm, endless
Machine weight 78 kg
3.3 Safety and machine protection facilities
COBRA C is equipped with an
-overcurrent cutout and an
-no-volt release
The overcurrent cutout protects the machine from damage and persons from endangering in the
case of short circuits.
The no-volt release prevents uncontrolled restart of the machine after power failure. The motor
will not restart automatically when the power returns, it will have to be switched on again.
4 Proper use
The parquet floor sander COBRA C is suitable for dry sanding of parquet and plank
floors. No other use is allowed.
Caution!
Never use COBRA C for wet procedures (mortal risk from electric shock)!
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Operating instructions
Parquet floor sander COBRA C
with gentle lifting lever
5 Installing the guide tube
Note: The COBRA C is delivered with the guide tube (1) removed.
Caution!
Injury to the operator or other persons could occur or damage could occur if the machine
starts up unintentionally. Disconnect the machine from the power supply before working
on the machine!
Instructions:
1. Insert the guide tube (1) into the guide tube support (7). The curved section of the tube must
face toward the motor. Clamp the guide tube by means of the clamping lever (6) located on
the guide tube support.
2. Position the pair of bores in the control rod connector (8) over the pair of bores in the control
rod (5). The control rod connector has to lie close on the right side of the control rod. Screw
together the parts with the two wing screws (4).
3. Move the main lifting lever (2) into the rear position to raise the sanding drum from the floor.
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