Morning: I retired from the screw machine world some 15 yrs. ago. The grease we used in the spindles was a "Kluber" brand sinthetic grease. Very spendy, very good though. The spindles that the grease was used in would go from 0 to 10,000 RPM and back to 0 approx. twice a minute, 24 hrs. per day, 5 days a week and had operated over 10 yrs. without any service to the spindles up to my retirement. These machines were "Star" brand swiss style screw machines. I know that all the other brands also used the same grease in their spindles. I remember having to service the spindle from another larger machine after a power glitch and servo failure and my boss complaining about the cost of a tube of grease. It is very common to remove the bearing cup by welding and at my time of retirement maintaince had a series of non conductive sleeves they would slide in to prevent spatter and a arc from leaving a buger on the ID. Before I left MN for AZ I stopped buy the local auto repair shop and they proudly showed me the better part of a 5 gallon pail full of bearing races that had been removed with the welding technique. Seeya Bob Malterer
----- Original Message ----- From: "Marius Liebenberg" <mar...@mastercut.co.za> To: <emc-users@lists.sourceforge.net> Sent: Thursday, November 27, 2014 9:13 PM Subject: Re: [Emc-users] Lathe spindle bearing problems >A puller like that would be nice to have but I am afraid that there is > no gap or any protrusion of the bearing race to grip on. > On 2014-11-27 22:49, Marcus Bowman wrote: >> On 27 Nov 2014, at 20:21, Marius Liebenberg wrote: >> >>> I will do the weld bead tomorrow and hopefully it will come out without >>> too much trouble. >> It's a counsel of perfection, I guess, at this stage, but I would use a >> puller fitted with very thin lips at right angles to the legs. These are >> designed to remove bearings from blind holes in car engines or gearboxes. >> The little lips are hardened and when you tighten the puller it squeezes >> the lips in behind the bearing, by wedging it into the radius in the >> outer casing of the bearing (the bit you have stuck in there at the >> moment). A GOOD QUALITY puller works well, and can get enough grip to >> ease the bearing off the bottom of the hole and get it out. I have done >> this once or twice and it is a good solution. My friend has a selection >> of good pullers for all sorts of awkward jobs like this. >> >> At this stage, unless you know someone with a puller like this, welding >> is probably your only other option. >> >> Marcus >> >> >> >> >>> On 2014-11-27 19:30, Ed wrote: >>>> On 11/27/2014 10:52 AM, Marius Liebenberg wrote: >>>>> So a little bigger tap with a little bigger mallet did the job. The >>>>> front bearing fell apart and is badly worn. >>>>> Now the seat is stuck inside the headstock >>>> To take out a bearing cup I use an arc welder and run a bead of weld >>>> around the inside of the cup, let it cool down, extract with fingers or >>>> tap the housing with your mallet. It can be done by heating with an >>>> oxy-acet torch but you must be fast in, fast heat and fast out. Arc >>>> works MUCH better. >>>> >>>> >>>>> and the bearing piece is >>>>> stuck to the shaft and I have no idea how to get it out. >>>>> >>>> The bearing race on the shaft is probably best removed by carefully >>>> grinding through the race in a couple of spots and cracking it with a >>>> chisel. >>>> >>>> Ed. >>>> >>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >>>> from Actuate! Instantly Supercharge Your Business Reports and >>>> Dashboards >>>> with Interactivity, Sharing, Native Excel Exports, App Integration & >>>> more >>>> Get technology previously reserved for billion-dollar corporations, >>>> FREE >>>> http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk >>>> _______________________________________________ >>>> Emc-users mailing list >>>> Emc-users@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/emc-users >>>> >>> -- >>> >>> Regards /Groete >>> >>> Marius D. Liebenberg >>> +27 82 698 3251 >>> +27 12 743 6064 >>> QQ 1767394877 >>> >>> >>> ------------------------------------------------------------------------------ >>> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >>> from Actuate! Instantly Supercharge Your Business Reports and Dashboards >>> with Interactivity, Sharing, Native Excel Exports, App Integration & >>> more >>> Get technology previously reserved for billion-dollar corporations, FREE >>> http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> ------------------------------------------------------------------------------ >> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >> from Actuate! Instantly Supercharge Your Business Reports and Dashboards >> with Interactivity, Sharing, Native Excel Exports, App Integration & more >> Get technology previously reserved for billion-dollar corporations, FREE >> http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > -- > > Regards /Groete > > Marius D. Liebenberg > +27 82 698 3251 > +27 12 743 6064 > QQ 1767394877 > > > ------------------------------------------------------------------------------ > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > from Actuate! Instantly Supercharge Your Business Reports and Dashboards > with Interactivity, Sharing, Native Excel Exports, App Integration & more > Get technology previously reserved for billion-dollar corporations, FREE > http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
