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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Re: Ceraballs - Morayballs?

Both designs will act as unipivots. In fact the bearing will have more opportunity to rattle and make noise if it is not perfectly seated and have a constant and even load. I think that if you look at turntable designs you will find that a fixed bearing is far more popular than using a bearing in a cup(easier to build) with a point, strictly from a clearence point of view you need to have tighter tollerance with a bearing than you do with a point. The fixed point idea has less chance to rattle and make noise (chatter) as would a bearing in a cup or race. So from a DIY position the fixed point unipovit is easier to build with fewer potential problems and a lower degree of tollerance to get the same job done. From an ultimate point of view you could probably build a design with less friction using a bearing(s) but I think that would be overkill for this kind of application given that you have then got more things which could go wrong. Build some anyway and tell people what you think. I would keep the overall height as short as is possible and if you drop the point of load (contact) to below that of the bearing you will further inhance the stability of the unipovit. Have some fun. Regards Moray James.


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  • Re: Ceraballs - Morayballs? - moray james 09:29:58 03/10/03 (0)


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