ROTEX® GS Backlash-free

Product characteristics
• Backlash-free shaft connection under prestress
• Small dimensions - low flywheel mass
• Maintenance free, easy to check visually
• Various kinds of elastomer hardness of spiders
• Finish bore according to ISO fit H7 (except for clamping hub), 
feathter key optionally available from Ø 6 mm according to DIN 6885 sheet 1 - JS9
• Ex Approved  according to EC Standard 94/9/EC (without feather key according to category 3)
Coupling description
ROTEX® GS is a three-part, axial plug-in coupling backlash-free under pre-stress. In spite of its vibration-damping 
characteristics it is torsionally stiff so that it is not necessary to make any concessions to accuracy even with 
highly dynamic servo drives. ROTEX® GS is available in different types of hubs which can be combined within one coupling 
Click on image to enlarge


Additional Information

ROTEX® GS is used on all those applications for which an accurate 
positioning by the drives is necessary. The different hub types and kinds of 
Shore hardness provide for the optimum coupling for every application in 
automation. It is considered to be the standard solution for ball screws 
with an incline of s<40. In servo hydraulics our ROTEX® GS is used more and 
more frequently, too. 
Please observe the selection advice in our company catalogue. Our 
applications consultants will be pleased to assist you with the selection of 
the coupling.

Operating Principle

The hub claws and the nylon teeth are chamfered to allow for a "blind 
assembly". The pegs arranged reciprocally on the spider prevent the spider 
from touching the hub over the entire surface. Observing the distance 
dimension E ensures the ability of the coupling to compensate 
for displacements. The plug-in force varies depending on the Shore hardness 
and prestress of the spider (see comments in the mounting instructions KTR-N 45510).
By observing the gap dimension "s" the electrical isolation is ensured, as well as 
a high service life of the coupling. This fact is gaining more and 
more importance, due to the increasing precision of shaft encoders and the 
existing demand for electro-magnetic compatibility.