TECHNICAL INFORMATIONS  

The machines, that are some times very similar, and are from time to time in all technical parameters the same need friction materials of very diverse features as per branches of industry owing to the diverse norms, special requirements and different environments.

Most of the technical faults occure from the mounting of materials of inadequate material composition or structure.

Instead of the thought : „ We need a piece of ferodol.. „ pse. choose the branche, you are interested in ,where you receive a wiev about these friction materials produced by us, without meeting the claim of complexity. We produce for our clients expressly in virtue of the given requirements, meeting fully their demands.

Friction materials must fit the following requirements:

 

- friction coefficient of equal dimension also in case of changing surface pressure
- change of friction coefficient should be the minimum as a function of the relative velocity of the friction surfaces,
- change of friciton coefficient should has a minimum value as a function of the warming (fading occurence )
- great mehanical strength
- wear resistance
- noise of braking should be the minimum
- insensibility to humidity, icing, rough contamination, - does not polish in case of little heat deflecting
- -does not vitrify in case of high heat deflecting
 

They are the more important, but by no means all basic requirements. To unify all basic requirements optimal in one corresponding pad is in the practice not possible, there fore we are forced to make compromises. In the interest of a good braking effect we have to endure for example an inclination to creaking , that is from standpoint of the security of a subordinated importance.

The wobbling, arisig as a function of velocity, temperature and surface pressure can not even be avoided, there fore in the process of brake pads developing we attach importance to keep the unalterable changes of friction coefficient among narrow limits.
Basically the brake effect is even the best, when the altering of friction coefficient relating to the pads has possible a mimimum value.
 

The factors, that have an influence on the friction coefficient :

 

- surface scabridity of friction surface,
- surface scabridity of counter piece
- compositon of friction material without asbetos
- pressure on the friction material
- density of friction material
- velocity
- operating temperature
 

Surface scrabidity of friction material :

 

Surface of friction material is grinded or milled, for a special demand with heat - treatment in a 0,1 mm layer and in the interest of speed attrition branded.

Sometimes carving resp. ribbing is from time to time indispensable, owing to the dynamic
thermical effects and possibly arising dusts.

Surface of counter- piece is in any case grinded.
 

Composition of friction materials without asbestos :

 
-metal powders – heat transmission
-metal oxides -
-metal fibres – mechanical features
-mineral matters - attrition and
-organic fibres - charring value, strenght
-artifical caoutchouc – strenght
-graphite – heat stability
-synthetic resin – strength and hardness
-other speeding – chemical bindings
-filling materials – rentability, fading, porosity value
 
The pressure on friction materials means the density and velocity:

The growing of surface pressure results a higher friction coefficient, while the increasing of velocity and temperature means a lower one.

We have to choose the friction coefficient and the technical parameters of the friciton materials on a way, that we achieve a minimum value of attrition regarding the friction layer.
The growing porosity increases the friction coefficient, reduces the heat conduction, weakens the strength, there fore it increases the attrition. The shrinking porosity spoils the heat running value.
The porosity has in general a value under 20 %.

Regarding the possible surface pressure in the combining of raw materials we pay attention to the fact, that the pressure on friction materials amounts in general 20 - 100 bar.

Operating temperature:

The pads of organic materials are able to stand the permanent heat up to a temperature of 400 celsius, while they can be burdened in short period with up to 700 Celsius temperature.

More information

 

R-63 Serie

R63 series
R-63-4 micron MAX > 0,42
R-63-5 micron MAX > 0,49
R-63-EL NON FERROMAGNETIC
R-63-RB FREE OF SPARK, WITHOUT METAL
R-63-GN FREE OF GRAPHITE
R-63-AG CORROSION RESISTANT OUTSIDE
R-63 –KE CONTAINING KEVLAR
 

RONA 63 SERIES, ARE FREE OF ASBESTOS, STICKABLE, RIVETABLE, FRICTION MATERIALS FOR RESTRAINDELY OIL RESISTANT TYPE OF BRAKE

COLOUR : BLACK
DENSITY : 2,30 g/ cm3
BREAKING STRENGTH < 60 N/mm2
MICRON AVERAGE 0,348
MICRON MAX 0,403
ATTRITION MASS % > 3,00 g
ATTRITION THICKNESS % > 0,30 mm
FLYING TENSILE STRENGTH 5500 f/min 150 Celsius
MAX P 1,92 N/mm2
MAX Celsius 380 Celsius 1 h
OIL RESISTANCE non
DURATION > 3000 OPERATING HOURS
 

 

 

R-103 Serie

R-103-4 MICRON MAX > 0,48
R-103-5 MICRON MAX> 0,511
R-103 - RB FREE OF SPARK, WITHOUT METAL
R-103 - GN FREE OF GRAPHITE
R-103 - AG CORROSION RESITANT OUTSIDE
R-103 - KE CONTAINING KEVLAR
 

SERIES RONA 103 ARE FREE OF ASBETOS, STICKABLE, RIVETABLE FRICTION MATERIALS FOR RESTRAINDELY OIL RESISTANT, FLEXIBLE TYP OF BRAKE.

COLOUR BROWN
DENSITY 2,10 g/cm3
TENSILE STRENGTH < 48 N/ mm2
MICRON AVERAGE 0,355
MICRON MAX 0,469
ATTRITION MASS % > 3,00 g
ATTRITION THICKNESS % > 0.30 mm
FLYING TENSILE STRENGTH 400 f / min 150 Celsius
MAX P 1,1 N/mm2
Max Celsius 380 C 1 h
OIL RESISTANCE non
DURATION > 3000 operating hours
 
 

 


 

R-203 Serie

R-203-4 micron MAX > 0,48
R-203-5 micron MAX > 0,505
R-203 - RB FREE OF SPARK, WITHOUT METAL
R-203 - GN FREE OF GRAPHITE
R-203 - AG CORROSION RESISTANT OUTSIDE
R-203 – AC STRENGTHENED WITH STEEL NET
 

RÓNA 203 SERIES ARE FREE OF ASBESTOS, STICKABLE, RIVETABLE FRICTION MATERIALS FOR RESTRAINEDLY OIL RESISTANT, HARD, ARCHED TYPE OF BRAKE

COLOUR BLACK
DENSITY 2,20 g/cm3
TENSILE STRENGTH < 48 N/mm
Micron AVERAGE 0,355
Micron MAX 0,459
ATTRITION MASS % > 3,00 g
ATTRITION THICKNESS % > 0,30 mm
FLYING TENSILE STRENGTH 3000 f/min 150 Celsius
MAX P 1,5 N/mm2
MAX Celsius 380 Celsius 1 h
OIL RESISTANCE non
DURATION > 4000 OPERATING HOURS
 

 

R-410 Serie

R-410-4 micron MAX > 0,46
R-410-5 micron MAX > 0,511

R-410- RB FREE OF SPARK, WITHOUT METAL
R-410-GN FREE OF GRAPHITE
R-410-AG CORROSION RESISTANT OUTSIDE
R-410-CS micron MAX > 0,09

 
RÓNA 410 SERIES ARE FREE OF ASBESTOS, STICKABLE, RIVETABLE OIL RESISTANT FRICTION MATERIALS FOR FLEXIBLE BRAKE - SHAFT COUPLINGS.

COLOUR YELLOW
DENSITY 1,10 g/cm3
TENSILE STRENGTH < 75 N/mm2
Micron AVERAGE 0,355
Micron MAX. 0,469
ATTRITION MASS % > 2,00 g
ATTRITION THICKNESS % > 0,10 mm
FLYING TENSILE STRENGTH 1000 f/min 150 Celsius
MAX P 1,9 N/mm2
MAX Celsius 450 Celsius 1 h
OIL RESISTANCE YES
DURATION > 9000 OPERATING HOURS
 

 

R-552 Serie

R-552-4 micron MAX > 0,496
R-552-5 micron MAX > 0,572
R-552-RB FREE OF SPARK ,WITHOUT METAL
R-552-GN FREE OF GRAPHITE
R-552-AG CORROSION RESISTANT OUTSIDE
R-552-EG HEAT ETCHED
 

RÓNA 552 SERIES ARE FREE OF ASBESTOS, STICKABLE, RIVETABLE, OIL RESISTANT, HARD FRICITON MATERIALS FOR COMPLEX BRAKES - SHAFT COUPLINGS.

COLOUR YELLOW OCHRE
DENSITY 1,98 g/cm3
TENSILE STRENGTH < 80 N/mm2
Micron AVERAGE 0,349
Micron MAX. 0,420
ATTRITION MASS % > 2,50 g
ATTRITION THICKNESS % > 0,20 mm
FLYING TENSILE STRENGTH 8000 f/min 150 Celsius
MAX P 1,3 N/mm2
MAX Celsius 380 Celsius 1 h
OIL RESISTANCE YES
DURATION > 5000 OPERATING HOURS
 
 

 

R-578 Serie

R-578-4 micron MAX > 0,496
R-578-5 micron MAX > 0,572
R-578-RB FREE OF SPARK, WITHOUT METAL
R-578-GN FREE OF GRAPHITE
R-578-AG CORROSION RESISTANT OUTSIDE
R-578-EG HEAT ETCHED
 

RÓNA 578 SERIES ARE FREE OF ASBESTOS , WITH IN MORE WOVEN LAYERS STRENGTHENED FRAMEWORK ( NATURAL FIBRES, OVER 200 MM ), STICKABLE,RIVETABLE,OIL RESISTANT FRICTION MATERIALS FOR COMPEX BRAKES – SHAFT COUPLINGS.

Farbe:schwarz, ockergelb mit Spinnbild
Konzentration: 2,10g/cm2
Ziehfestigkeit < 80N/mm2
Reibkoeffizient Drchscnitt 0,349
Reibkoeffizient MAX: 0,458
Verschleissgewicht % -3,00g
Verschleissdichte % - 0,20mm
Fliegreissfestigkeit 13000 f/min 150C°
MAX P 1,3N/mm2
MAX C° 300C° 1h
Ölbeständigkeit :ja
Lebensdauer - 8000Betriebsstunde

 

R-880 MED
 
Die RÓNA-880 gehört zu der asbestfreien, klebbaren, gemässigt ölbeständigen, ärtzlichen, elektrischen, magnetisch, in UV-Umgebung benutzbaren, komplex
Bremse-Kupplungarten von Reibstoffen.

Farbe: schwarz
Konzentration:1,50g/cm2
Ziehfestigkeit < 40N/mm2
Reibkoeffizient Durchschnitt 0,365
Reibkoeffizient MAX. 0,433
Verschleissgewicht % -2,00g
Verschleissdichte % -0,20mm
Fliegreissfestigkeit 4500f/min 150C°
MAX P 1,1N/mm2
MAX C°250C° 1h
Ölbeständigkeit: ermässigt
Lebensdauer - 4000Betriebsstunde

 

R-978 Serie

R-978-1 Reibkoeffizient MAX -0,11
R-978-2 Reibkoeffizient MAX -0,18
B-987-RB metallfrue undf funkfrei
R-978-AG auswärts korrosionfest
 

Die RÓNA 978 Serie gehört zu den asbestfreien, vielschichtigen, gespinnten, gestellverstärkten, mehr als 200mm langen, natürlichen Fäden, nietbaren, ölbeständigen, harten Schleuderelementen.

Farbe: schwarz, ockergelb mit Spinnbild
Konzetration:1,98 g/cm2
Ziehfestigkeit < 80N/mm2
Reibkoeffizient Durchscnitt 0,08
Reibkoeffizient MAX: 0,11
Verschleissgewicht % - 0,03g
Verschleissdichte % -0,02mm
Fliegreissfestigkeit 2000f/min 150°C
MAX P 3,3N/mm2
MAX C° 380C° 1h
Ölbeständigkeit --ja
Lebensdauer - 5000 Betriebsstun
 


 

 

 

Up             Back

If you got here from an external link, you can find the navigation panel here