Precision couplings catalog
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RELIABLE | PRECISE | COMPACT PRECISION COUPLINGS EXACT AND BACKLASH FREE FOR PRECISION SERVO AND STEPPER DRIVE APPLICATIONS.

ABOVE ALL R+W IS: THE PERFECT COUPLING. When R+W Antriebselemente GmbH was first established in 1990 in Klingenberg, Germany, there were three people on board. The head office is still there, but we are now more than 170 people, with subsidiaries in the USA, China, Italy, Singapore, France and Slovakia, and are partnered with over 60 well established distributors in more than 40 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...

DRIVE D - DYNAMIC Our staff is trained to always be ready and willing to provide a quick reaction to customer inquiries. Our product, the core of which is based on handling high performance, dynamic applications, is increasingly available for fast delivery. R - RELIABLE Many of our products are designed for infinite life with zero maintenance required. With thorough engineering processes in place, and an ISO 9001:2008 certified production facility, we continue to deliver high quality coupling products with a high level of reliability. I - INNOVATIVE Our business was founded on developing...

APPLICATIONS AND DESIGN FEATURES PRECISION COUPLINGS TORSIONALLY STIFF BELLOWS COUPLINGS for highly dynamic motion in: ► Paper converting machinery ► naturally very well balanced ► wear and maintenance free TORSIONALLY STIFF MINIATURE BELLOWS COUPLINGS for precise transmission of angular ► Test and measurement systems

BACKLASH FREE SERVOMAX® ELASTOMER COUPLINGS Packaging machinery Pump drives Machine tools Lift systems Conveyors Labeling machinery Food processing machinery vibration damping electrically isolating backlash free calibrated preloaded insert concentrically machined hubs BACKLASH FREE SAFETY COUPLINGS for vibration damping torque transmission in: protects from rotating inertia as well as motor torque precise torque overload protection patented preload for zero backlash compact simple design low moment of inertia extremely fast disengagement low residual friction after disengagement ATEX...

APPLICATIONS AND DESIGN FEATURES PRECISION COUPLINGS BACKLASH FREE AND SMOOTH RUNNING LINE SHAFTS for spanning large distances between shaft ends in: ► Material handling systems ► Screw jack systems ► installation and removal without disturbing adjacent equipment ► no intermediate support bearing required HIGH STRENGTH DISC PACK COUPLINGS ► Steel mill equipment ► Bulk material handling systems ► Cooling tower drives ► maintenance free for infinite life ► frictional clamping of disc packs ► high speeds with extended DBSE ► high torsional stiffness ► robust compact design ► precise...

FOR USE IN HAZARDOUS ENVIRONMENTS – ATEX for safer operation in industries with explosive atmospheres, such as: For hazard zones 1/21 and 2/22 these couplings are authorized under directive 94/9/EG. Bellows couplings Elastomer couplings Safety couplings Line shafts Disc pack couplings ATEX CERTIFIED COUPLINGS DISC PACK COUPLINGS LP Oil & gas extraction Petrochemical processing Munitions manufacturing Bulk and powder processing Paint systems

BELLOWS COUPLINGS = Rated torque of the coupling (Nm) = Peak torque of the drive system e.g. max. acceleration torque of drive (Nm) or max. braking torque of load (Nm) = Total load inertia (e.g. spindle + slide + workpiece + 1/2 of coupling) (kgm 2) = Total driving inertia (motor [including gear ratio] + 1/2 of coupling) (kgm 2) = Torsional stiffness of the coupling (Nm/rad) = Natural frequency of the two mass system (Hz) = Excitation frequency of the drive (Hz) = Torsional deflection (degree) Shock or Load Factor SA uniform load non-uniform load highly dynamic load Common factor for servo...

SIZING EINBAUHINWEISE 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...

ELASTOMER COUPLINGS = Rated torque of the coupling (Nm) = Maximum torque rating of the coupling (Nm) = Peak torque applied to the coupling (Nm) = Peak torque of the drive system (Nm) = Nominal torque of the drive system (Nm) = Nominal torque of the load (Nm) = Total driving inertia (motor [including gear ratio] + 1/2 of coupling) (kgm2) = Total load inertia (e.g. spindle + slide + workpiece + 1/2 of coupling) (kgm2) = Moment of inertia of driving coupling half (kgm2) = Moment of inertia of driven coupling half (kgm2) = ratio of the moment of inertia of the drive to the load = Temperature at...

SIZING EINBAUHINWEISE COUPLING SELECTION FOR OPERATION WITHOUT SHOCK OR REVERSAL Calculation Supplemental Calculation Sample calculation: (without shock loads) Coupling conditions υ = 70° C Sυ = 1.7 (or 70°/ Elastomer Type A) Drive for centrifugal pump TAN = 85 Nm Result: Coupling model EK2/150/A (TKN = 160 Nm) is selected. 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 Calculation MODELLREIHEN ATEX The...

SAFETY COUPLINGS = Rated torque of the coupling (Nm) = Peak torque of the motor (Nm) = Moment of inertia of the load (kgm 2) = Moment of inertia of the drive (kgm 2) = Acceleration / deceleration time (s) = 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) = Natural frequency of the two mass system (Hz) = Torsional deflection (degree) Shock or Load Factor SA uniform load non-uniform load highly dynamic load Common factor...