templedog Posted February 12, 2009 Share Posted February 12, 2009 What form is the best for the lowest friction if a rod needs to spin horizontally on a flat surface? something like this |----------- ------ = the rod | = the flat surface is there some kind of design that can be etched in them to make the rod turn as easy as possible? Link to comment Share on other sites More sharing options...
Klaynos Posted February 12, 2009 Share Posted February 12, 2009 Bearings, bearings, bearings.... Link to comment Share on other sites More sharing options...
npts2020 Posted February 13, 2009 Share Posted February 13, 2009 Rolling rods are frequently used as bearings, few things are as efficient. AFAIK any modification (besides making them ball bearings possibly) would make them less efficient. Link to comment Share on other sites More sharing options...
Externet Posted February 13, 2009 Share Posted February 13, 2009 Check if any of the Rolamite variants applies to your needs. Miguel Link to comment Share on other sites More sharing options...
templedog Posted February 14, 2009 Author Share Posted February 14, 2009 I cant use bearings.... I was thinking maybe if the tip of the rod was diamond and the surface was also made out of diamond. The rod diamond would have to be as sharp as possible? Would it be possible to make a bearing out of diamond? Would it last forever? Link to comment Share on other sites More sharing options...
npts2020 Posted February 14, 2009 Share Posted February 14, 2009 I cant use bearings.... I was thinking maybe if the tip of the rod was diamond and the surface was also made out of diamond. The rod diamond would have to be as sharp as possible? Would it be possible to make a bearing out of diamond? Would it last forever? That is kind of what graphite lubricants do. It would be possible to construct the rod out of a diamond and IMO should last longer than one constructed from most other materials so long as there is little vibration or shock (diamonds are notoriously brittle). It would not last forever though, think about a diamond needle on a turntable. Link to comment Share on other sites More sharing options...
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