Precision couplings
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When R+W Antriebselemente GmbH was first established in 1990 in Klingenberg, Germany, there were three people on board. Meanwhile the headquarter have been relocated to Worth am Main. We now employ more than 280 people, with subsidiaries in the USA, China, Italy, Singapore, France and Slovakia, and are partnered with over 80 well established distributors in more than 50 countries throughout the world. Many developments have lead to this success, but most importantly it was brought about by our endless search for the best possible coupling solutions as well as the high esteem in which we...

TO THE TOP OF THE WORLD WITH TONS OF DRIVE Our guiding principle, DRIVE, is a mutual calling that unifies our 280 employees: To manufacture top-notch, highperformance couplings and torque limiters for the global market; precise to the micrometer. With DRIVE, we present ourselves as a Dynamic, Reliable, Innovative and Versatile market and technology leader that strives for Expansion by making further development and improvement part of our everyday business. DRIVE MEANS DYNAMIC Dynamics fascinate us. For our team “dynamic” means outstanding expertise in all matters involving torque...

TORSIONALLY STIFF BELLOWS COUPLINGS from 2 - 10,000 Nm AREAS OF APPLICATION for highly dynamic motion in: ► Machine tools ► Packaging machinery ► Printing machinery ► Paper converting machinery ► Labeling machinery ► Automation equipment FEATURES ► torsionally stiff ► low moment of inertia ► zero backlash ► highly concentric ► naturally very well balanced ► precise transmission ► infinite life ► wear and maintenance free ► easy to install TORSIONALLY STIFF MINIATURE BELLOWS COUPLINGS from 0.05 - 10 Nm AREAS OF APPLICATION for precise transmission of angular motion and torque in: ► Linear...

from 0.5 - 25,000 Nm AREAS OF APPLICATION for vibration damping torque transmission in: ► Packaging machinery ► Pump drives ► Machine tools ► Lift systems ► Conveyors ► Labeling machinery FEATURES ► vibration damping ► electrically isolating ► backlash free ► calibrated preloaded insert ► concentrically machined hubs BACKLASH FREE TORQUE LIMITERS P. 89 from 0.1 - 2,800 Nm AREAS OF APPLICATION for overload protection in: ► Machine tools ► Packaging machinery ► Metal forming equipment ► Test stands ► Pump drives ► Assembly systems FEATURES ► protects from rotating inertia as well as motor...

ATEX CERTIFIED COUPLINGS ELASTOMER COUPLINGS EK | TX

SYMBOLS Tkn = Rated torque of the coupling (Nm) Tas = Peak torque of the drive system e.g. max. acceleration torque of drive (Nm) or max. braking torque of load (Nm) JL = Total load inertia (e.g. spindle + slide + workpiece + 1/2 of coupling) (kgm 2) JA = Total driving inertia (motor [including gear ratio] + 1/2 of coupling) (kgm 2) CT = Torsional stiffness of the coupling (Nm/rad) fe = Natural frequency of the two mass system (Hz) fer = Excitation frequency of the drive (Hz) 9 = Torsional deflection (degree)

SIZING INSTALLATION ACCORDING TO TORQUE Couplings are normally sized for the highest torque to be regularly transmitted. The peak torque of the application should not exceed the rated torque of the coupling. The following calculation provides an approximation of the minimum required coupling size, and allows for the maximum rated speed and misalignment to exist in the application: The torsional natural frequency of the coupling must be significantly higher or lower than that of the equipment. For the mechanical substitution model the two mass system applies. In practice the following...

SIZING INSTALLATION COUPLING SELECTION FOR OPERATION WITHOUT SHOCK OR REVERSAL Calculation Supplemental Calculation Sample calculation: (without shock loads) Coupling conditions Drive for centrifugal pump υ = 70° C TAN = 85 Nm Sυ = 1.7 (or 70°/ Elastomer Type A) Result: Coupling model EK2/150/A (TKN = 160 Nm) is selected. ELASTOMER COUPLINGS EK | TX COUPLING SELECTION FOR OPERATION WITH SHOCK LOADS Same basic conditions as above. In addition, the maximum torque rating of the coupling (TKmax) is dictated by peak torque (TS) due to shock loads. Supplemental Calculation Supplemental...

SYMBOLS Tkn = Rated torque of the coupling (Nm) TAS = Peak torque of the motor (Nm) JL = Moment of inertia of the load (kgm 2) JA = Moment of inertia of the drive (kgm 2) a = Angular acceleration (1/s 2) t = Acceleration / deceleration time (s) to = Angular velocity (1/s) CT = Torsional stiffness of the coupling (Nm/rad) JMasch = Total load inertia (e.g. spindle + slide + workpiece + 1/2 of coupling) (kgm2) JMot = Total driving inertia (motor [including gear ratio] + 1/2 of coupling) (kgm2) fe = Natural frequency of the two mass system (Hz) 9 = Torsional deflection (degree) ACCORDING TO...

ACCORDING TO LINEAR FEED FORCE Spindle Drive (ball screw / lead screw) Belt Drive / Chain Drive ELASTOMER COUPLINGS EK | TX TAN = ACCORDING TO RESONANT FREQUENCY (SK2 / SK3 / SK5 WITH METAL BELLOWS ES2 / ESL WITH ELASTOMER RING) The torsional natural frequency of the coupling must be significantly higher or lower than that of the equipment. For the mechanical substitution model the two mass system applies: JMasch + JMot JMasch · JMot ACCORDING TO TORSIONAL DEFLECTION (SK2 / SK3 / SK5 WITH METAL BELLOWS ES2 / ESL WITH ELASTOMER RING) To calculate transmission error as a result of torsional...