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Product characteristics
- Shaft coupling for torque transmission and damping of torsional vibrations
- Axial plug-in - easy assembly - maintenance free
- Operative range from -40ºC to +100ºC, peak temperature up to +120ºC
- Compensation for axial, radial and angular shaft misalignments
- large base programme from stock:
- finish bore acc. to ISO fit H7 and feather key groove acc.
to DIN 6885 sheet 1-JS9
- spline toothings acc. to DIN and SAE
- inch and taper bores
- Explosion protection rated and confirmed acc. to EG Directive 94/9/EG
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Description of coupling
ROTEX® couplings are characterized by small dimensions, low weight and low mass moments of inertia yet transmit high torques. Running quality and service life of the coupling 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.
ROTEX® DZ - New elastomer system for big ROTEX® couplings
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The torsionally flexible ROTEX® jaw coupling has proven its worth on numerous applications for more than forty years. Now KTR has an innovation for the large ROTEX® coupling: The patented standard ROTEX® DZ does not have the wellknown star-shaped elastomer spider, but the elastomer spider is rather divided up into individual segments with two teeth each.
This new design is the new standard for the series ROTEX® 100 to ROTEX® 180. The well-known one-parted spider is only supplied on special request in these sizes. The ROTEX® DZ spider segments are offered as flexibly damping components in the well-known kinds of standard Shore hardness 92 Sh-A and 95 Sh-A.
The new spider segment system is particularly beneficial in combination with ROTEX® A-H shell hubs. Driving and driven side do not have to be moved any longer, but by moving a ROTEX® A-H hub only the segments can be replaced with few efforts only. |
General description
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ROTEX® 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 periphally 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 located between them.
The teeth of the spider are crowned to avoid edge pressure if the shafts are misaligned.
ROTEX® couplings are capable of compensating for axial, radial and angular displacements of the shafts to be connected. |
Performance
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In contrast to other flexible couplings, the intermediate members of which are subject to bending 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 show deformation 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 be fitted both horizontally and vertically. |
Explosion-proof use
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ROTEX® couplings are suitable for power transmission in drives in hazardous areas. The couplings are certified and confirmed according to EC standard 94/9/EC (ATEX 95) as units of 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 Certificate and the operating and mounting instructions! |
Spiders
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An operating temperature range of -40°C to +90°C ensures perfect operation. Transient temperature peaks up to +120°C do not cause any damage on the coupling. Continuous improvement 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 possible to make use of a spider 95/98 Shore A or 64 Shore D-F.
Up to size ROTEX® 90 inclusive one-parted spiders are used. For ROTEX® couplings from size 100 to 180 the spider consists of the new DZ tooth segments as a standard. For some sizes the one-parted spider can further be delivered as an option.
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. |
