Aaaahhhh, that makes sense then, Rick
On 2/29/2016 8:25 AM, BRIAN GLACKIN wrote: > A note on German wiring from the early 1990's. At that time the Green > Party came in and pushed fro higher recycling. Many manufacturers went > with a higher recycled content in their wire insulation to meet the edict. > Mercedes Benz was one of the earliest hit by this change. Harness in the > W124 line of vehicles in 1993-1995, were failing after 2 years in service. > The recycled content made the covering brittle with exposure to heat in the > near term and generally shorter lifetimes. Sounds like this hit machine > parts as well from that era. > > On Sun, Feb 28, 2016 at 5:22 AM, Gregg Eshelman <g_ala...@yahoo.com> wrote: > >> On 2/27/2016 8:04 AM, Dave Cole wrote: >>> The nut and screw are matched to each other and then they fit the nut to >>> the screw with the proper sized balls. >>> Usually they are purchased together as a set and you really don't want >>> to take them apart unless it is necessary. >>> You can have screws reground - I think that Thompson and Nook others do >>> that in the US. >>> I suspect that if you have a "standard" screw you might be able to fit a >>> new nut to it, but then if the nut is shot, generally the screw also >>> needs help. >>> So what usually needs to be done is that the nut and screw need to be >>> reconditioned as a set. >>> I worked on a machine that had a bad screw and they got a quote from >>> Thompson or Nook to have the screw and nut reconditioned and I think it >>> was about half what a new >>> set would have cost. >> Some of them have every other ball slightly smaller as a spacer to >> reduce turning friction. Unfortunately that also cuts load capacity. >> What some rebuilders do is replace all the balls with ones of the full >> size, or if the screw has to be ground more than usual they'll install >> larger than original balls. >> >> If you have a screw with even wear along its length and a willingness to >> experiment, and precise way to measure ball diameter, you can buy new >> balls on eBay real cheap. Choose some just a smidge larger than what was >> in it and see if the screw tightens up, without binding. >> >> There's probably some formula to select the ball size required based on >> measuring backlash etc, but the balls are cheap enough to buy more than >> one size. >> >> What I'd like to see is a precision and accuracy test of a new ground >> ball screw VS a high grade rolled ball screw VS a rebuilt with full >> grind rolled ball screw. >> >> >> --- >> This email has been checked for viruses by Avast antivirus software. >> https://www.avast.com/antivirus >> >> >> >> ------------------------------------------------------------------------------ >> Site24x7 APM Insight: Get Deep Visibility into Application Performance >> APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month >> Monitor end-to-end web transactions and take corrective actions now >> Troubleshoot faster and improve end-user experience. Signup Now! >> http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Thanks Rick Lair Superior Roll & Turning LLC 399 East Center Street Petersburg MI, 49270 PH: 734-279-1831 FAX: 734-279-1166 www.superiorroll.com ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
