How Do I Interchange Couplings With Different RPM Ratings?

Release Date: May 13, 2020

How Do I Interchange Couplings With Different RPM Ratings?

Transcript

Location: Sioux Falls, SD
Question: How do I interchange couplings with different RPM ratings?
Answer:In the small servo coupling range, like what we make, there is no standardization like there is in something like the L-series type jaw couplings. For example, we rate our couplings with all factors at maximum. The primary factors are torque, misalignment, and speed. We feel this gives designers the best information on how hard the coupling can actually be pushed. Every manufacturer is different, though, and communicates information that they feel best informs their audience. In this case being discussed, this manufacturer uses a hypothetical rating with performance factors isolated. If there is no torque and no misalignment, it is conceivable that the beam coupling could perform at that RPM. It probably depends on how hot the shafts get. When you account for axial motion, it's primarily thermal expansion of the shafts, so as long as the shafts aren't too hot it's conceivable the coupling could work at that RPM. To be clear, I'm not suggesting that one system is better or worse. They're both valid. The engineer needs to understand how the manufacturer rates their couplings so they can account for that in their design as well as how they test within the system. One thing that is consistent among us manufacturers is that we recommend to test, test, test, before implementing.

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