Industrial friction materials for brakes, clutches and sliding applications
As a specialist in the processing of fibrous materials and thermoset plastics, Rex Industrie-Produkte Graf von Rex GmbH develops and manufactures friction linings for brakes, clutches and sliding materials with an extremely high load durability and long life time.
From prototypes to serial mass production – in addition to the development of customer and application specific solutions, we specialise in small to medium quantities. We advise you personally and individually, already in the design phase. Thanks to our in-house metal processing facilities, we are able to offer you assembly development and production in combination with friction linings. We produce our own tools.
- Technology leader for full friction moulded rotors
- Over 40 years of practical experience in material development and tool manufactoring
- DIN ISO9001 certified
- IHK research award winner for rotors with sensor technology
Rex Industrie friction and sliding materials Made in Germany
Our products are deployed in a wide range of industry applications and meet the highest technical requirements. We are able to press-mould friction pads with demanding specifications in various 3D contours with high dimensional accuracy while maintaining tight tolerances. For very precise tolerances, our CNC-controlled turning and milling machines enable us to produce almost any 3D contours. By pressing fastening elements into the friction pad component, subsequent costs for assembly and bonding are saved and assembly groups are simplified.
The quality management system we implement is certified according to ISO 9001 and is monitored by TÜV Süd. Furthermore, the quality management system for certain products complies with Module D (Production Quality Assurance) of Directive 96/98/EC for marine equipment and is regularly inspected and certified by BG Verkehr.
Applications
| Industry | Application | Solution |
| Agricultural technology | Commercial vehicles, tractors, lawn mowers | Segments and rings for clutches and brakes of the drive components |
| Drive technology | Robots, automatic door and opening systems, aerial cableways, freight elevators, escalators, industrial clutches and brakes | Full friction moulded rotors, friction rings and segments for service and emergency stop brakes, brakes in servo drives, clutches as overload protection and for accelerating |
| Lifting technology | Crane systems, winches | Friction rings, segments and composite functional parts for locking elements, holding and emergency holding brakes, overload clutches |
| Sanitary engineering | Mixer taps and shower heads | Moulded parts as brake lining for inhibiting and arresting movements |
| Textile industry | Rotor spinning machines, winding machines, drying plants | Moulded and composite parts for braking, holding and sliding rails in the high-temperature textile range |
| Machine and plants building industry | Packaging machines, press technology, woodworking, intralodistics, insulation technology, large and small machines | Moulded and composite parts, friction rings; sliding rails in locking, acceleration, force transmission and retaining elements |
| Pharmaceutical industry | Packaging machines, conveyor technology, AutoStore and robotics | Moulded and composite parts, friction rings in locking, acceleration, power transmission and retaining elements |
| Aircraft industry | Aircraft seating interior, screenholding | Moulded parts as brake lining for inhibiting and arresting movements |
| Renewable energies | Wind turbines | Friction rings and segments for locking and overload protection, holding brakes and slipping clutches |
| Marine industry | Winches and cranes in off- and on-shore applications | Friction rings, segments and composite functional parts for locking elements, holding and emergency holding brakes, overload clutches |
Material development / product engineering / manufacturing
Our services:
- Personal custom and application-specific advice on the use of friction material
- Project support from the design/sample phase to the start of series production
- Tool and product design/planning
- Rex exclusive standard materials
- Rex in-house development of individual materials according to customer requirements
- Laboratory tests on friction, temperature, wear and strength/durability behaviour
- FEM strength simulations and toothed gear development
- Process development for series production and assembly
Our manufacturing capabilities:
- Press-moulding of individual components
- Internal tool manufactoring
- Water jet cutting of 2D contours from friction material plates
- Sawing of blanks for friction linings
- Grinding of friction linings and metal parts
- Drilling
- Bonding of friction material to various carrier materials
- CNC milling (5-axis milling technology) of friction material parts in small and medium quantities
- CNC turning
- Labelling/marking (logo, QR code, data matrix, barcode, etc.)
- Manual and automated deburring of friction material parts
- Assembly & serial production
Products “Made in Germany” for industrial brake, clutch and functional part applications
Rex friction and sliding materials are resin-bonded high-performance fibre composite materials that are manufactured using long-fibre carbon, aramid and high-tech glass fibres. The products are characterised by extremely high load durability and long life time. These material properties allow them to be used both as friction lining and press-moulded parts. Thanks to the very high strength/durability, our materials can be used for full friction moulded rotors with simultaneous power transmission in the toothed area. The damping characteristic of this rotor in comparison to aluminium carriers rounds off the overall package.
The materials for slide rails have high wear resistance at continuous temperatures up to over 270°C.
Advantages of Rex Industry products:
- Asbestos-free
- REACH/RoHS compliant
- Solvent-free
- Metal-free possible
- Made in Germany (product formulas, production, packaging, test laboratory)
- Complete traceability (on request with printed evidence, 100% documentation)
- Higher fibre content than competitor products
- Higher strength than competitor products
- Longer life time than competitor products
- Exclusive use of environmentally friendly premium materials
Materials
The technical specifications concerning friction, strength/durability, temperature and wear behaviour are determined on Rex in-house test benches and are based on test parameters according to internal Rex standards. These can be used as guide values for an initial customer-specific design using common safety values. In the sample and prototype phase, we recommend carrying out application-related tests under the customer-specific application parameters.
The materials listed are standard recipes. Other are available on request.
| Material | Friction coefficient static [µ] | Maximum continuous use temperature¹[°C] | Characteristics/Application | Technical data sheet PDF |
| R 529 | 0,35 | 250 | Very high strength, hardness and stable friction behaviour (containing metal) Industrial and holding brakes, clutches with high contact pressures |  PDF |
| R 535 | 0,35 | 260 | High strength and stable friction behaviour even in permanent slipping applications (containing metal) Drive clutches, load and safety brakes | PDF |
| R 560 | 0,29 | 260 | SVery high strength and stable low friction behaviour in higher temperature ranges (metal-free) | PDF |
| R 675 | 0,52 | 240 | Very high and stable friction behaviour at low and high temperatures (metal-free) Brakes and holding devices especially of servo applications |
PDF |
| R 681 | 0,47 | 275 | Soft friction material with high coefficient of friction (metal-free) For special applications in drive technology and general mechanical engineering |
PDF |
| R 686 | 0,25 | 250 | High strength and very stable friction behaviour even in permanent slipping applications (metal-free) Slipping and safety clutches, safety brakes, rotors for electromagnetic brakes |
PDF |
| R 702 | 0,43 | 250 | Medium strength and hardness, high friction coefficient (metal-free) Stop and safety brakes in large electric motors |
PDF |
| R 721 | 0,44 | aA² | Medium strength and hardness, high friction coefficient (metal-free) Locking and inhibiting movements in the sanitary industry |
PDF |
| R 722 | 0,45 | 225 | Low strength and hardness, high friction coefficient and lifetime (containing metal) Brake shoes and brake blocks in small machines with high sliding speeds |
PDF |
| R 724 | 0,42 | aA² | NLow strength and hardness, high friction coefficient and lifetime (containing metal) Brake shoes and brake blocks in textile industry and small machines with high sliding speeds |
PDF |
| R 725 | 0,40 | 275 | High strength and hardness with good friction behaviour (metal-free) Moulded parts for locking applications in the aircraft industry and rotors for electromagnetic brakes |
PDF |
| R 726 | 0,42 | 300 | High strength and hardness with high friction behaviour (metal-free) Rotors for electromagnetic brakes |
PDF |
| R 727 | 0,37 | aA² | High strength and hardness with good friction behaviour (metal-free) Moulded parts for cone brakes |
PDF |
| R 728 | 0,37 | aA² | Medium strength and hardness with good friction behaviour incl. anti-sticking effect (metal-free) For special applications in drive technology and general mechanical building industry |
PDF |
| R 730 | 0,36 | aA² | High strength and stable friction behaviour (metal-free) Sliding and guide rails, sliding pieces, toothed gears for rotors |
PDF |
| R 731 | 0,45 | aA² | Very high strength, hardness and very high friction behaviour (metal-free) Rotors for electromagnetic brakes especially in the field of servo applications, friction blocks in clutches and brakes |
PDF |
| R 732 | 0,53 | 300 | Very high strength, hardness and very high friction behaviour (metal-free) Rotors for electromagnetic brakes especially in the field of servo applications, friction blocks in clutches and brakes |
PDF |
| R 900 | 0,27 | 270 | Laminated sliding material with very high strength and low friction behaviour in higher temperature ranges Slide and guide rails in drying plants |
PDF |
¹ The static temperature is permanently tolerated. Short-term temperature peaks can be significantly higher than this.
² on request
Stock material
Direct sale of friction materials in existing plate, strip, round and block form.
Plates in different sizes and thicknesses
- Available formats: 120x120, 260x260 and 260x610 mm
- Available thicknesses: 3.5 to 10.5 mm (larger thicknesses on request)
Strips in different sizes and thicknesses
- Available formats: 15x598, 25x598 and 35x618 mm
- Available thicknesses: 2 to 8 mm (larger thicknesses on request)
Round material in different sizes and thicknesses
- Ø20x16, Ø25x10/x25, Ø35x26, Ø55x12 mm
Block material in different sizes and thicknesses
- 60x250x22, 70x75x40 mm (rounded corners)
Sheet and strip material can be individually ground to the required thickness and cut using water jet to the requiered contour. For this purpose, simply send us a possible drawing.
Round and block goods can be reworked to almost any 3D contour in a milling or turning operation. For this purpose, simply send us a possible drawing or a possible 3D step model.
Finished materials and recipes are available as raw materials in granular form if the customer has the appropriate production facilities.