Electronics > Beginners

Same-size replacement for older potentiometer?

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soldar:

--- Quote from: james_s on August 03, 2019, 02:20:41 am ---I've had pot shafts get broken before, usually they are carbon steel that is strong but somewhat brittle. Unless I were very desperate I would not try making a replacement shaft for a pot, my time is worth a lot more than that even at minimum wage relative to the cost of a new pot. Of course if you're itching for an excuse to use the lathe then it may ave some merit.
--- End quote ---

It seems you missed the part where I said If you cannot find a replacement.

And, it may seem strange to you but some people enjoy tinkering with mechanical parts just like some people enjoy tinkering with electronics. It's a waste of time, I know.

And if that shaft is similar to some I have seen it is just a cylinder with a flat end like a screwdriver and can be made in very little time, even without a lathe.

Let me repeat, If you cannot find a replacement.

mikerj:

--- Quote from: soldar on August 02, 2019, 11:36:52 pm ---What material was the shaft? Because it is a strange mode of breaking.

--- End quote ---

If you look at the new ones the shaft is retained with a circlip (E clip) right at the end of the threaded section.  This means the shaft has a nice stress raising groove machined into it at exactly the point that it will experience the most stress if the control knob is knocked sideways.

elroy:

--- Quote from: edpalmer42 on August 02, 2019, 01:56:50 am ---Claro = Clarostat who is a well known manufacturer.  I did a quick check on ebay for <clarostat potentiometer 50K> and came up with these:
--- End quote ---

Thanks again for the links to the Clarostat pots. I ordered the one below, which arrived today. The part numbers aren't an exact match, but this looks as identical as anything is going to get. Much appreciated!

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