ROTEX
®
Torsionally flexible coupling
You will find continuously updated data in our online catalogue at www.ktr.com.
ψ =
Spider
Standard from
size 14 - 180
Spiders – our innovation T-PUR
®
KTR has developed a new standard material for its spiders. The improved polyurethane
material T-PUR
®
is resistant to significantly higher temperatures and has a considerably
longer service life than the previous polyurethane material. From the visual point of view
we have characterized the material T-PUR
®
by the colours orange (92 Shore-A), purple
(98 Shore-A) and pale green (64 Shore-D). The previous spiders made of polyurethane
in yellow, red and natural white with green ends will still be available.
Up to size ROTEX
®
180 inclusive single-parted spiders are used as a standard. Optionally
the DZ tooth elements continiue to be available for ROTEX
®
couplings sizes 100-180.
pressure
requested mounting space min. D
H
x 0,05
Deformation with load
torsion
Load on spider
Explosion-proof use
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 at www.ktr.com.
In addition to the ATEX marking an inspection certificate by DNV, Bureau Veritas or ABS
can be ordered for ROTEX
®
couplings.
Performance
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
®
cou-
plings 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 deforma-
tion 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.
General description
ROTEX
®
couplings are torsionally flexible and designed for positive torque transmission.
They are fail-safe. Operational vibrations and shocks are efficiently dampened and re
-
duced. 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.
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
Product characteristics Curved tooth plug-in coupling ( two-part) made from nylon Maintenance-free due to material combination nylon Compensation for shaft misalignment; axial - radial - angular Low own weight as well as low flywheel torques Axial plug-in - easy assembly Operative range -25° C to + 100° C Available from stock with finish bore for standard shafts Including feather keyway according to DIN 6885 page 1 and thread for setscrew Tolerance of the bore + 0.05 - 0.1 feather keyway ± 0.08 Coupling description BoWex® Curved-tooth gear couplings® are flexible shaft connections for a positive torque transmission and specifically suitable to compensate for axial, radial and angular shaft misalignment. According to the well-known effect of curved-tooth gear couplings any edge pressure in the spline in case of angular and radial displacements is avoided so that BoWex couplings are almost free from wear.
