cup jewels vs vee jewels. Please help!!

fernando · 17th August 2005, 12:24 AM

Hello
I am trying to fix/make the bearing for a Pink Triangle export turntable. The cup jewel on the spindle is damaged. The rest of the bearing assembly (including the ball) is missing.
I am considering a sapphire ball working between two cup jewels. I believe that is pretty much what was there. The diameter of the ball obviously has to be smaller than the diameter of the cups but; any suggestions on how much smaller? Does anyone know where I can get the parts? I know I can get the balls at smallparts.com but they don’t have cup jewels only vee jewels, which I believe will add a lot more friction than the cups.
Any suggestions will be greatly appreciated.
Fernando.

Vinyl-Addict · 14th October 2005, 06:40 PM

Fernando, I just found this company online. They sell what you are looking for. Good luck!

http://www.swissjewel.com/sapphire_cup_jewels.htm

Quote:

Originally posted by fernando
Hello
I am trying to fix/make the bearing for a Pink Triangle export turntable. The cup jewel on the spindle is damaged. The rest of the bearing assembly (including the ball) is missing.
I am considering a sapphire ball working between two cup jewels. I believe that is pretty much what was there. The diameter of the ball obviously has to be smaller than the diameter of the cups but; any suggestions on how much smaller? Does anyone know where I can get the parts? I know I can get the balls at smallparts.com but they don’t have cup jewels only vee jewels, which I believe will add a lot more friction than the cups.
Any suggestions will be greatly appreciated.
Fernando.

tubenut · 14th October 2005, 07:55 PM

The guy behind Pink Triangle is back on the scene as The Funk Firm and they do offewr some service on PT....

www.thefunkfirm.co.uk i think.....

avinunca · 30th May 2009, 05:53 PM

I find myself in the same situation with a newly acquired PT1.
The jewel has disappeared. Has anyone successfully installed a
replacement jewel? It's true tha the Funk Firm can supply a new
bearing at Â£190 ouch! I read that the brass part that the jewel
sits in can be pulled out of the aluminium holder so it should be
easy to fit a replacement.

avinunca · 30th May 2009, 05:55 PM

....fortunately the rest of my bearing is intact. I have emailed the
swiss jewel company listed above.

Mark Kelly · 30th May 2009, 11:55 PM

The usual ratio of cup radius to ball radius is between 2 and 3.

That being said, Arthur K has a mind of his own and often does unusual things.....

avinunca · 31st May 2009, 12:19 AM

So to confirm; if the ball bearing is 2mm , the cup in the jewel will be 4 to 6mm?

17th August 2005, 12:24 AM	#1
fernando diyAudio Member Join Date: Dec 2004 Location: Boston	cup jewels vs vee jewels. Please help!! Hello I am trying to fix/make the bearing for a Pink Triangle export turntable. The cup jewel on the spindle is damaged. The rest of the bearing assembly (including the ball) is missing. I am considering a sapphire ball working between two cup jewels. I believe that is pretty much what was there. The diameter of the ball obviously has to be smaller than the diameter of the cups but; any suggestions on how much smaller? Does anyone know where I can get the parts? I know I can get the balls at smallparts.com but they don’t have cup jewels only vee jewels, which I believe will add a lot more friction than the cups. Any suggestions will be greatly appreciated. Fernando.

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14th October 2005, 07:55 PM	#3
tubenut diyAudio Member Join Date: Nov 2002 Location: South Africa, Jhb	The guy behind Pink Triangle is back on the scene as The Funk Firm and they do offewr some service on PT.... www.thefunkfirm.co.uk i think.....

30th May 2009, 05:53 PM	#4
avinunca diyAudio Member Join Date: Mar 2007	I find myself in the same situation with a newly acquired PT1. The jewel has disappeared. Has anyone successfully installed a replacement jewel? It's true tha the Funk Firm can supply a new bearing at Â£190 ouch! I read that the brass part that the jewel sits in can be pulled out of the aluminium holder so it should be easy to fit a replacement.

30th May 2009, 05:55 PM	#5
avinunca diyAudio Member Join Date: Mar 2007	....fortunately the rest of my bearing is intact. I have emailed the swiss jewel company listed above.

30th May 2009, 11:55 PM	#6
Mark Kelly diyAudio Member Join Date: Feb 2006 Location: Geelong	The usual ratio of cup radius to ball radius is between 2 and 3. That being said, Arthur K has a mind of his own and often does unusual things.....

31st May 2009, 12:19 AM	#7
avinunca diyAudio Member Join Date: Mar 2007	So to confirm; if the ball bearing is 2mm , the cup in the jewel will be 4 to 6mm?

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