FLENDER Couplings

As the worldwide largest manufacturer of mechanical couplings, with more than 80 years of experience, Siemens ensures that machine shafts are safely connected in almost all industrial sectors – worldwide – Available with EURO-TECH.

 

The high-quality industrial couplings are very well suitable for the use in many fields of application, many of them even in potentially explosive atmospheres. The product range covers couplings of a torque range from 10 up to 10,000,000 Nm.

 

Your benefits

FLENDER couplings stand for highest reliability, low maintenance, and low investment and lifecycle costs. Even as individually adapted solutions they are convincing owing to highest product quality and long service life.

 

FLENDER Torsionally rigid couplings

ZAPEX gear couplings are particularly suitable for rough operating conditions as occur, for example, in metallurgical engineering or in the cement industry. In addition, ZAPEX couplings stand out due to their power capacity combined with compact design.

ARPEX all-steel couplings are without circumferential backlash, suitable for high ambient temperatures, and especially for machines which must be operated with high precision. Examples are papermaking and printing machines.

 

Your benefits

 

  • Because of a multitude of series and sizes, drives with low, average, and high powers are covered and special customer requirements can be met
  • ARPEX all-steel couplings are independent of direction of rotation (suitable for reversing operation)
  • Available also for use in potentially explosive atmospheres (in conformity with directive 94/9/EC

FLENDER ZAPEX ZW Gear coupling


 

The double-jointed gear couplings of the ZAPEX ZW series compensate angular, parallel and axial misalignment of shafts. They are particularly suitable for use under rough operating conditions. The series comprises 31 sizes of which many are available ex stock. In addition to the standard series, couplings up to 10,000,000 Nm can be offered.

 

Examples of application

 

  • Presses
  • Crushers
  • Mixers
  • Materials handling technology
  • Pumps

 

Advantages of the product

 

  • Low restoring forces in case of shaft misalignment
  • Suitable for both directions of rotation (reversing operation) and vertical installation
  • Long service life and minimum maintenance requirement as a result of reliable oil or grease lubrication of the gear teeth
  • Small dimensions owing to compact design for the use in confined spaces
  • Can be used for high shock loads; with large safety reserves
  • Can be used in potentially explosive atmospheres; certified acc. to 94/9/EC (ATEX 95)

FFLENDER ZAPEX ZN Gear Coupling


 

ZAPEX ZN couplings connect machine shafts and compensate angular and radial misalignment. ZAPEX gear couplings of the ZN series are made of high-quality quenched and tempered steel and are manufactured according to the modular construction system. They are available at short term in 12 sizes up to a torque of 162,500 Nm.

 

Examples of application

 

  • Systems in the steel industry (rolling mills, roller tables, shears, punches, presses, etc.)
  • Mixers
  • Presses
  • Crushers
  • Kneaders
  • Mills
  • Conveyor technology
  • Pumps

 

Advantages of the product

 

  • Long service life and minimum maintenance requirement as a result of reliable grease lubrication of the gear teeth
  • Small dimensions, low weight and low mass moments of inertia are achieved by appropriate design and combination of materials
  • Maximum bore range and grease lubricated gear teeth
  • Large safety reserves also at high shock loads
  • Maximum operational reliability through optimum tooth shape and use of high-quality materials
  • Suitable for horizontal mounting and in special design also for vertical mounting
  • Can be used in potentially explosive atmospheres; certified acc. to 94/9/EC (ATEX 95)

FFLENDER ARPEX All-steel coupling


 

ARPEX all-steel couplings have proved themselves for over 30 years in all fields of engineering where reliable and maintenance-free transmission of torque is required in the case of shaft misalignments. The compact and rugged design ensures a long service life and a high degree of operational reliability.

 

Examples of application

 

Type approvals of many Classification Societies are on hand for the use of ARPEX couplings in shipbuilding.

 

Other examples of application are

 

  • Pumps
  • Compressors
  • Ventilators
  • Paper machine drives

 

Advantages of the product

 

  • Maintenance-free and wear-resistant
  • Compensation of angular, radial and axial shaft misalignment possible
  • Torsionally rigid and without circumferential backlash
  • Temperature-resistant from -40 °C up to +280 °C
  • Low restoring forces
  • Independent of direction of rotation (reversing operation possible)
  • Nearly vibration-free operation (even at max. permissible speed)
  • Can be used in potentially explosive atmospheres; certified acc. to 94/9/EC (ATEX 95)

 

FLENDER Flexible couplings

Flexible FLENDER couplings are suitable for plug-in assembly and are easy to mount. The flexible elements compensate shaft misalignments and absorb moderate shock loads of motor or driven machine. Standard couplings of a wide modular design range and application-related couplings in special design cover a multitude of applications.

 

Your benefits

 

  • Reliable transmission of torque in case of shaft misalignment with low restoring forces
  • Suitable for vertical mounting position
  • Electrically insulating series are also available
  • Low degree of maintenance
  • Many series and sizes available ex stock at short term
  • Also available for use in potentially explosive atmospheres (acc. to 94/9/EC)

FLENDER N-EUPEX Pin coupling




 

Due to their torsional flexibility N-EUPEX couplings offer the possibility of moving critical torsional vibrations from the operating area of the mechanical equipment in such a way that no negative effects on the drive train are to be expected. N-EUPEX couplings are made of high-quality cast iron. The flexible elements made of synthetic rubber (buna N) are available in different degrees of hardness for many applications. Metal pins and flexible elements are so designed that no wear occurs when properly fitted.

 

Examples of application

 

Widely used in the whole field of mechanical engineering, as high-speed coupling on the motor side (e. g. pump, fan or compressor drives) as well as high-torque couplings for the connection of gear unit and driven machine (e. g. mills).

 

Advantages of the product

 

  • Torsionally rigid and damping pin coupling to be used universally for compensating shaft misalignments
  • Maximum operational reliability, since fail-safe
  • Suitable for plug-in assembly and simplified replacement of elements in the type consisting of three parts
  • Dynamic adaptation by selection of elastomer hardness
  • Torque range from 19 Nm up to 62,000 Nm for 23 sizes and 10 different types
  • Can be used in potentially explosive atmospheres; certified acc. to 94/9/EC (ATEX 95)
  • High degree of availability of parts ex stock

FLENDER N-EUPEX DS Pin coupling




 

N-EUPEX DS couplings without fail-safe device allow positive disconnection of input and output side upon failure of the flexible elements due to overload or wear. Then, the metal parts of the DS coupling can freely rotate in opposite directions. 19 sizes offer a wide range of applications. DS couplings are offered in a torque range between 19 and 21,200 Nm. Many types are available ex stock.



Examples of application

N-EUPEX DS couplings can be used universally in the whole field of mechanical engineering. They are particularly used in sensitive machines where input and output side are to be disconnected upon failure of the flexible elements or where the coupling must be maintenance-free.


Typical examples of application are:


  • Pump drives
  • Compressor drives
  • Fan and blower drives


Advantages of the product
  • Torsionally flexible and damping pin coupling without fail-safe device
  • Can be combined with many parts of the N-EUPEX range
  • Maintenance-free even if used in explosive atmospheres
  • Can be used in potentially explosive atmospheres; certified acc. to 94/9/EC (ATEX 95)

FFLENDER RUPEX Pin and bush coupling




 

RUPEX couplings are used as flexible compensating couplings in all applications requiring a reliable transmission of torque under harsh operating conditions. The conical seats of the buffer pins facilitate mounting and guarantee maintenance-free operation. The optimized shape of the barrelled buffers allows simple plug-in assembly and low circumferential backlash. Many type variants are offered, e. g. with brake disk, axial play limiting device, or brake motor couplings.


Examples of application

RUPEX couplings are used in general mechanical engineering both as high-speed couplings and for high torques, e. g. in


  • Cranes
  • Conveyors
  • Blowers
  • Screw pumps
  • Cableways
  • Mixers
  • Cement processing machines

Advantages of the product
  • Flexible fail-safe pin and bush coupling for medium up to high torques
  • Compact design; low weights and mass moments of inertia
  • Independent of direction of rotation (suitable for reversing operation)
  • Suitable for plug-in assembly (blind assembly, bell housing installation)
  • Torque range of the standard series between 200 Nm and 1,300,000 Nm
  • Can be used in potentially explosive atmospheres; certified acc. to 94/9/EC (ATEX 95)

FLENDER BIPEX Claw coupling




 

BIPEX couplings are used for all mechanical engineering purposes where an uninterrupted transmission of power is required even in the presence of unavoidable shaft misalignments. BIPEX couplings are particularly suitable for the connection of driven machines with uniform torque loads. They have a very low circumferential backlash and can be used for any inclined mounting position.


Examples of application

General mechanical engineering; especially as high-speed coupling on the motor side and for bell housing installation, e. g. in:


  • Hydraulic drives
  • Geared motors
  • Pump drives
  • Axle drives


Advantages of the product

  • Torsionally flexible; high damping properties
  • Flexible fail-safe claw coupling
  • Very compact design; high power capacity
  • Very well suitable for plug-in assembly and assembly into bell housings
  • Available ex stock in 13 sizes for a torque range from 13.5 Nm to 3,700 Nm
  • Type BWT with Taper bush for easy assembly and bore adaptation

 

FLENDER Highly flexible couplings


Due to their low torsional rigidity and good damping properties, highly flexible FLENDER couplings are excellently suitable for connecting non-uniformly working machines. They are preferably used in periodically exciting systems, such as drives with internal combustion engines or piston compressors. Because of the large elastomer volume, comparably large shaft misalignments can be compensated.


Your benefits


  • Transmission of torque possible with nearly no circumferential backlash
  • Compensates very large axial, radial and angular misalignment (e.g. on flexibly installed machines)
  • Easy removal and fitting of flexible elements
  • Series available for use in potentially explosive atmospheres in conformity with directive 94/9/EC

FLENDER ELPEX Flexible ring coupling




 

Owing to its low torsional stiffness and damping property the ELPEX coupling is very well suitable for connecting machines with a considerably non-uniform torque characteristic. Types with a fail-safe device between the flexible rings ensure emergency operation if the flexible rings are destroyed. ELPEX couplings are available in 12 sizes for torques from 1,600 Nm up to 90,000 Nm.


Examples of application

Drives with periodically exciting systems, such as


  • Internal combustion engines
  • Piston compressors
  • Piston pumps.


Drives subjected to high shock loads or large shaft misalignments, for example in


  • Compressors
  • Excavators
  • Shredders


Advantages of the product

  • Highly flexible coupling without circumferential backlash for large shaft misalignments
  • Suitable for high dynamic loads
  • Good damping properties
  • Available as shaft and flange coupling
  • Designs according to API 610 and API 671 available

FLENDER ELPEX-B Rubber tyre coupling




 

Highly flexible ELPEX-B couplings transmit torques without circumferential backlash in machines with non-uniform torque characteristic. They are resistant to wear and maintenance-free. The hubs of the ELPEX-B couplings are made of high-quality cast iron or steel. The torque is transmitted by a flexible tyre reinforced with a cord ply.


Examples of application

ELPEX-B couplings are used in


  • Pump drives
  • Compressor drives
  • Blower drives


Frequently, they are also used in roller table drives.


Advantages of the product

  • Compensation of very large shaft misalignment
  • Independent of direction of rotation (suitable for reversing operation)
  • The rubber tyre can be easily replaced without the need to move the coupled machines
  • Easy mounting on the shafts possible with Taper bushes
  • Nominal torque range between 24 Nm and 14,500 Nm

FLENDER ELPEX-S Rubber disc coupling




 

Owing to its low torsional rigidity and damping property the ELPEX-S coupling is very well suitable for connecting machines with a considerably non-uniform torque characteristic. The inside diameter of the rubber disk element is vulcanized on a flange. As standard, ELPEX-S couplings are designed as flange/shaft connection or shaft/shaft connection. The hub can serve to take a Taper bush.


Examples of application

Used in general mechanical engineering; especially suitable for drives


  • comprising internal combustion engines
  • comprising piston compressors
  • for cement mills


Advantages of the product
  • Torsional vibration insulating with linear torsion spring characteristic
  • Many kinds of flange connection possible (among others acc. to SAE)
  • Easy plug-in assembly even for mounting positions difficult to access
  • Types are available on which replacement of rubber disk element is possible without the need to move the coupled machines
  • Overload protection protecting motor and driven machine
  • Wide range of nominal torques between 330 Nm and 63,000 Nm
  • Rubber elements available for ambient temperatures up to 120 °C
  • Can be used in potentially explosive atmospheres; certified acc. to 94/9/EC (ATEX 95)

 

FLENDER Hydrodynamic couplings


FLUDEX couplings are hydrodynamic fluid couplings operating according to the Föttinger principle. The coupling parts on the input and output side are not mechanically connected and thus not subject to wear. Torque is transmitted by the fluid movement in the coupling accelerated by the radial blades.


Your benefits


  • Soft and shock less starting of machines and conveyors
  • Acceleration of very large masses without the necessity to use over dimensioned motors
  • Protection of drive against peak loads in case of frequent starting and reversing operations
  • Excellent vibration separation and shock damping; greatest possible extent of torsional vibration uncoupling in drives subject to vibration

FLENDER FLUDEX Fluid coupling




 

The FLUDEX coupling is a fluid coupling on which the coupling parts on the input and output side are not mechanically connected and thus resistant to wear. FLUDEX couplings limit the starting and the maximum torque in the drive train and serve as starting aid for the motor, as overload protection in case of malfunction, and for torsional vibration separation. Four series of FLUDEX couplings are offered with various types and sizes designed according to the modular construction system and for power ratings up to 2,500 kW.


Examples of application

  • Conveying systems (also underground)
  • Centrifuges
  • Mixers
  • Drum drives
  • Crushers
  • Ventilators
  • Pumps
  • Shredders
  • Bucket wheel excavators
  • PTO shaft generators


Advantages of the product

  • Soft and shockless starting of machines and conveyors
  • Torque limitation during start and overload protects coupled components of a plant
  • Excellent vibration separation and shock damping
  • Torque transmission without wear allows the starting of internal combustion engines with connected loads
  • Little operating slip of the coupling at nominal load
  • Can be used in potentially explosive atmospheres; certified acc. to 94/9/EC (ATEX 95)


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