Andy, I have not seen such an arrangement. The ones I have seen have the nut mounted in a carrier first.
Things to consider: Are the OD of the ball nut and the centerline of the ball screw concentric? Some castings are offset to help with mounting the return tubes. Is the OD perfectly round? The bearing that you referenced is a very thin section and would easily distort if the OD of the ball nut was out of round. How are you going to attach a pulley to rotate the ball nut? You should be aware of lubrication issues. A spinning nut tends to expel it own lubricant. The industrial ones I have seen provide for lubricant feed into the carrier holding the ball nut. Steve Stallings > -----Original Message----- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: Tuesday, December 11, 2012 7:04 AM > To: Enhanced Machine Controller (EMC) > Subject: [Emc-users] Ballnuts > > Has anyone ever seen a bearing press-fitted to the outside of > a ballnut? > > I am designing a rotating-nut system, and simply pressing the ballnut > into the middle of a double-row angular contact bearing would be very > simple. > > I suppose an alternative would be to look at threading a part of the > OD of a flanged ballnut. > > http://simplybearings.co.uk/shop/p150726/3808B2RSRTVH+Rubber+S > ealed+Double+Row+Angular+Contact+Ball+Bearing+40x52x10mm/produ > ct_info.html > > For example looks like a very nice fit on the outside of a > 2005 ballnut. > > I suppose I could easily use the next size up and a threaded sleeve. > (I only just found that style, I had been looking at wheel bearings, > which also look rather usable, relatively slim, and preload > adjustable) > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
