On Monday 02 September 2013 13:29:27 andy pugh did opine: > The spindle of my milling machine has a plate that specifies Vitrea > oil 72 for the gears but Alvania Grease 3 for the bearings. > > I suspect that the top bearing needs grease because there is no > prospect of it getting enough oil by splash. > > I further suspect that the bottom bearing needs grease because it > serves to keep the oil in… > > There is no hint of an oil seal. I wonder why? It does mean that the > operator needs to wear overallas as the grease/oil mix dribbles out > and spins off. > > I am considering retro-fitting an oil seal, does anyone see any > obvious problems with such a plan?
Could the oil seal be incorporated into the bearing replacement by giving the outer race of the bearing a coat of whatever they use on the outside of an oil seal and putting in a bearing with a decent lip type seal? Then I'd just run it full of the oil by adding a spring loaded lid oil cup just below the top bearing such that if the cup was full of oil, you were assured that at least the top bearings ball or roller cage was running in it. Unless of course it runs fast enough to heat the oil (and by inference expand & leak out the top) by viscosity losses. Below 5000 revs, I can't believe that would be a problem. Another thought would be to machine an o- ring groove in the bearing pocket to seal the OD of the bearing, making the future replacement of the bearing much easier done. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> The existence of god implies a violation of causality. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
