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ROTEX

®

Torsionally flexible coupling

® ROTEX General description

Description of coupling

ROTEX
® - couplings are characterized by small dimensions, low weight and low massmoments of inertia yet transmit high torques. Running quality and service life of thecoupling are improved by accurate all-over machining.Their application is ideal for transmitting torque while damping torsional vibrations and absorbing shocks produced by the uneven operation of certain prime movers.
® - couplings are torsionally flexible and designed for positive torque transmission.They are fail-safe. Operational vibrations and shocks are efficiently dampened and reduced. The two congruent coupling halves with concave claws on the inside are peri-phally offset in relation to one another by half a pitch. In addition, they are designed in such a way as to enable an involute spider to be locatedbetween them. The teeth of the spider are crowned to avoid edge pressure if the shafts are misaligned. ROTEX
torsion pressure ® couplings are capable of compensating for axial, radial and angular displacements of the shafts to be connected.ROTEX
torsion Performance In contrast to other flexible couplings, the intermediate members of which are subject tobending stress and are therefore prone to earlier wear, the flexible teeth of ROTEX couplings are subject to pressure only. This gives the additional advantage of the individual teeth being able to accept considerably higher loads.The elastomer parts showdeformation with load and excessive speeds. Sufficient space for expansion should be ensured (see drawing – deformation with load).The maximum torsion angle with ROTEX couplings of any size amounts to 5°. They can befitted both horizontally and vertically.
Deformation with load Load on spider Explosion-proof use ROTEX
requested mounting space min. DHx 0,05 ® couplings are suitable for power transmission in drives in hazardous areas. Thecouplings are certified and confirmed according to EC standard 94/9/EC (ATEX 95) as unitsof category 2G/2D and thus suitable for the use in hazardous areas of zone 1, 2, 21 and 22.Please read through our information included in the respective Type Examination Certificateand the operating and mounting instructions at www.ktr.com. Spiders
Standard spidertooth flanks crownedGS spiderstooth flanks rectangular, with web An operating temperature range of - 40 °C to + 90 °C ensures perfect operation. Transienttemperature peaks up to + 120 °C do not cause any damage on the coupling. Continuousimprovement of materials has resulted in a standard spider of 92 Shore A which offers various advantages over usual polyurethane materials. For higher torques it is also possibleto make use of a spider 95/98 Shore A or 64 Shore D-F.The spiders are extremely resistant to wear, oil, ozone and ageing. In addition, they are resistant to hydrolysis (ideal for tropical climates).The high internal damping protects the drive against dynamic overload.
Comparison of loadsTwisting angleDamping = Dampings- [AD]Flex. deformation [Ae]operation torque T torque T torque T w/o dampingwith dampingtwisting angle dyn. charact. curve CTdyn. operating pointstat. charact.curveCTstat. period Twisting angle 19