This is the second part of a two-part article from KTR’s most frequently asked coupling questions.
9. How do the kinds of spider hardness of ROTEX GS differ
We provide the flexible spiders in five different kinds of Shore hardness. Scale A is used for softer nylon, while scale D is used for harder nylon.
To facilitate the identification of the spider hardness, our spiders are molded in different colors:
10. Is it possible to combine the different types of hubs?
Yes, it is. The different types of hubs can be combined with each other within one coupling size.
11. Why may it be difficult to plug in the spiders/coupling hubs of ROTEX GS or are they available easy to plug in as an alternative?
The zero-backlash feature of the ROTEX GS coupling is based in the prestress between spider and coupling hub. The force required for plugging depends on the coupling size and spider hardness. It can be reduced by lubricating or greasing the spider or hub. For that purpose, please make use of oils and greases on a mineral oil basis without any additives, lubricants on a silicon basis (e. g. Optimol Optisil WX) or Vaseline. Another option to reduce the force applied is our patented procedure of thermo-calibrating. For that purpose please contact our application consultants.
12. Can I install a mixture of ROTEX and ROTEX GS components in one coupling?
Yes, you can, but not for zero-backlash applications.
13. What is the difference between TOOLFLEX M and TOOLFLEX S?
The difference is the number of layers and the resulting length of the bellow. The TOOLFLEX Design M has six layers and is able to compensate for large displacements subject to its length. In contrast, Design S has only four layers, is consequently shorter and has a higher stiffness.
14. Where can I get 3D data from?
A large number of our 3D data is available in the KTR 3D-SpaceCenter. If the data you require is not included, please send an email to one of our application consultants.
15. When will you send me my password for the KTR 3D-SpaceCenter?
We will not send you the password. With your initial registration, you will define your personal password at that time. As soon as you have registered and defined a password, you will have immediate access to our 3D data.
16. Where can I find the coupling description on the coupling or which description do I use for ordering spare parts?
Our couplings are always marked with coupling type and coupling size (e. g. www.KTR.com – ROTEX GS 28). The type of hub or bore diameter is not part of the marking on the coupling and has to be measured. Our application consultants will assist you with the identification of the type of hub.
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