On Wednesday 29 June 2016 08:35:30 Todd Zuercher wrote: > I don't know how much use it is to you, but I bought a custom ball > screw (cut to length and ends machined to my specs) from Hiwin, for > significantly less (about half) of what the cost of buying an OE lead > screw (not ball screw) from the manufacturer of one of our machines. > It works better and has lasted more than twice as long as the original > lead screws (which used to last only about 2 years). > > ----- Original Message ----- > From: "Dave Cole" <linuxcncro...@gmail.com>
This has also been my experience too, Todd. Inquiry's to the OE people for fresh screws or nuts, I have allway's been given a verbal quote for 2 to 3x what I can get the ball screw with nut from fleabay. So I have to make a new nut mount and likely the apron its mounted on if its a lathes Z screw. I can and have done that 4 times now. 2 more times for this 1952 Sheldon I just bought is just that much less time in the bars. Biggest problem by far is finding room for the nut. I think that is going to make me use a 16mm screw for Z, but its a long reach for a 16mm screw. I'd much druther use a 20mm there. Or even a 25mm but there's not enough room for its nut to clear the bed casting even with the flats lined up right. So the screw I am going to use for X only measures 9.22mm's OD, and its single track nut is only .750" in diameter and .700" long. No flange, except for the ball recycle tube sticking up another 40 thou, a perfect cylinder, and my measurements seem to indicate that it will pass the top of the beds way peaks with enough clearance to work if I drive it in with the recycle tube on the side of the nut, seems Sheldon did not well center the screw bore in the crossfeed. So, having miss-laid the scrap of 1x2 hot rolled bar stock about 3" long that I was going to make this nut cage from, I am off to TSC to get a 1" square piece to carve a pocket for this nut in. But I believe I will make the pocket about .350" longer so that I can stuff in some old felt hat felt to make a combo of swarf wiper and oil wiper, by running a piece of weed eater fuel line to it that I can use it to oil it occasionally. Seems like a good idea anyway. :) Details at 11, what ever day that is. :) Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
