Les, have you looked at turning the bearings around? If it's easy enough, you could press the bearings out and swing them 180 degrees. They'll now run on a new part of the rail. Assuming of course, that the front and back are similarly mounted and have both been making the same groove.
On Mon, 29 Apr 2019 at 14:57, Les Newell <les.new...@fastmail.co.uk> wrote: > Those self lubricating bushings tend to have a relatively large amount > of backlash, especially after a bit of use. Ball type bushings work well > even in dusty environments as long as you keep them greased. As the > rails are very smooth rubber wipers will clear the dust very effectively. > I on not keen on the round type bushings. They have very high point > loading between the balls and rails. On heavily loaded rails such as the > X axis you start wearing grooves in the rails. Rectangular rails have > much lower contact pressure because the grooves are close to the same > shape as the balls. My router uses 2" diameter round rails and even > those have deep grooves worn into them. Admittedly this machine is 30+ > years old. > > Les > > On 28/04/2019 20:30, Leonardo Marsaglia wrote: > > There are some open type bushings. But I don't know how the will behave. > > Just curious about them. > > > > > https://www.aliexpress.com/item/OP-JDB-304564-copper-sleeve-the-same-size-of-LM30-OP-linear-Solid-inlay-graphite-Self/32310066889.html?spm=2114.search0104.8.38.28173ea0iA8XJ7&transAbTest=ae803_3 > > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
