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Lapidary / Gemstone Community Forum
April 25, 2019, 02:20:27 pm
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Crown Cab Machine With Non-standard Shaft?

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Author Topic: Crown Cab Machine With Non-standard Shaft?  (Read 202 times)
amdrake
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« on: November 20, 2015, 02:32:25 pm »

I've read all the posts concerning Crown cabbing machines, but no one mentioned having my problem.  I was recently gifted a used Crown 8" machine with 2 silicon carbide wheels, 2 rubber wheels (with ugly clamps to hold grit strips), and a disk on each end.  It needs cleanup, but the arbor spins smoothly.  My issue is the arbor shaft is 1 1/8" in diameter, and I see no accessories advertised that can slide on to a shaft this size!  I'd like to replace the rubber-wheels-with-clamps with expando wheels so there is no "bump" every time the clamp comes around.  I haven't assessed the state of the "sic" wheels yet.  Does anyone know of a source for accessories for a 1.125" shaft?  If I really have to, I can cut down the shaft to one inch and replace everything on it, but that is a heap of work!

--Tony
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jakesrocks
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« Reply #1 on: November 20, 2015, 02:50:03 pm »

This is just a 2 wheel Crown machine, but does your machine look like this one, with an upside down Poly arbor in the middle ? If so, it should be a 3/4" arbor shaft. Did someone press larger diameter adapters on the shaft ends ?

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« Reply #2 on: November 20, 2015, 04:45:22 pm »

I just acquired an old Poly Arbor type Crown that is set up for 12" wheels. It is very heavy duty. It looks like yours Don,  except turned right side up. The shaft is 1" dia. The same as my 4 wheel Crown. I have never run across anythjng with a 1 1/8" shaft. I Love my old Crown though. Good Luck with yours!!!
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Bob

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amdrake
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« Reply #3 on: November 21, 2015, 01:16:21 pm »

Well this is embarrassing.  I just checked by spinning off an end disk and saw that my "non-standard shaft" is just a 1" shaft with tube spacers covering every visible part of it!  I wish I had thought of that earlier.  Thanks for the responses.  Just for closure, that posted picture of a big two-wheeler with the motor on the top is not my model.  Mine looks just like the pictures posted by "Hansel" in 2013 that I found by searching earlier.  I couldn't find a model number on it.  Now I can get busy swapping out those wheels with the grit strip clamps for rubber expandos.

--Tony
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