On 1/5/2014 6:00 AM, andy pugh wrote: > Normally I would prefer a lathe with a separate power shaft, a geared > headstock and an underdrive with roller bearings on the spindle.
That one does have a ball bearing spindle. The right bearing is a dual row, angular contact, preloaded one. All nice and special and expensive. The only plain bearing lathes Logan made were the Standard Model Montgomery Ward versions. The Deluxe Model ones had ball bearings and so did all the Logan branded ones. That the plain bearing ones exist and cost less than the ball bearing version shows how cheap labor was in the 1940's. I dunno how long it would take a skilled worker to cast and finish the Babbitt in a Montgomery Ward lathe headstock, but the worker's wage for that time had to cost less than the two ball bearings. If not, Logan never would have made the Standard model. The Standard model also didn't have the power cross feed. (Don't know if it could be ordered with the plain bearing headstock.) The Montgomery Ward 10" and the 9" Logan and lower cost 10" Logan lathes had power cross feed but lengthwise feed was all with the half nuts, no separate threading and feeding speed ranges. The higher priced 10" and larger Logans had power feed both directions. On the 10" (dunno about other sizes) with the quick change gearbox, the leadscrew, apron and right end leadscrew support were out a bit farther from the bed. If upgrading a non-QCGB 10" with a gearbox, the easiest way to do it is to mill that much off the back side of the gearbox housing. I think lathe.com has info on how to do that. I own a plain bearing 10" Montgomery Ward, by the serial number (1031) it's the 30th lathe Logan made. Someone else owns the 20th (1021) lathe, which is a Deluxe model. The first one was serial 1001. After around 10,000 Montgomery Ward lathes were made, the numbering was restarted at 1000A. Dunno why they did that instead of just continuing with consecutive numbers. Logan Actuator doesn't have detailed records on the Montgomery Ward lathes. Would be nice if they did, then I'd know exactly when and where mine was sold. With its low serial number it might be the very first Standard model produced. I've yet to find anyone else who owns one. I suspect most of them died of bearing abuse through lack of oiling then were scrapped or had their headstocks swapped for ball bearing ones - but I've also not come across any mention of any other Montgomery Ward lathe with a P after the serial number. Might be P for plain bearing. ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
