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Kadee couplers - Layout Design, Trackwork & Operation. - Getting You Started. - Your Model Railway Club
 Posted: Thu Nov 7th, 2019 09:57 pm
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An interesting topic re the brass centreing spring for Kadee couplers

especially this post

Harrison, the box spring is designed to "only" to be installed "on top of the coupler". If you look closely at at the spring you will see a big difference in the spring arms. As mentioned, there's a strong and weak side to help with uncoupling and delayed action. Also, note the end of the shank on the #5 type of couplers have different angles that are not symmetrical and these match the different spring arm angles. This is why it's important to always have the spring on top. If the spring is installed on the bottom it may work OK but eventually there will be problems. Note that when the couplers are coupled and in operation this takes the centering spring out of the performance issue so the spring on the bottom has no affect. It's when the coupler has to be uncoupled and centered properley that problems will arise and the spring may wear out faster. Remember that this is all late 1950s technology which is still the most popular in our coupler line, presently even more than our whisker couplers.

 Sam Clarke R&D Kadee Quality Products

NCE DCC ; 00 scale UK outline.
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 Posted: Thu Nov 7th, 2019 10:41 pm
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Putting in the whisker types is bullet proof - there is only one way to put one on (unless you fancy upside down operations). As are the NEM types. All Kadees are handed, that's why the orientation of the metal "spring" with uneven length arms is probably important (I've put #5's in with the spring on the bottom or the top and never noticed any difference twixt the 2). Which begs the question - why do the whiskers have even lengths? Or NEM's have none?


©Nigel C. Phillips
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