Also as most all cone clutches go they are prone to sticking.? The cones wear into a? near perfect fit and they like to stay there after seated it seams.? Buddy had a sheldon that he kept a wood mallet at the end of the lathe bed so he could whack the clutch knob when it would stick.? As designs go the Dalton clutch is a good one, simple and well made.? I have worked with all the SB clutches as well as Champion Logan and others some good some? not so good.? Never understood why American lathe mfg. never went to the face gear clutch so common today.? You see that clutch used on most all of the better quality imports as well as English and Italian built machines. I'm sure the Germans did also but never had the opportunity to work with one.? I did have and still do a Lion lathe that was built in Bulgaria and it also used a clutch similar to the Dalton and never liked it as it was always sticking.? The only clutch of this design that does not stick and that is the one South Bend used on the 9 inch workshop lathe.? its a different design than the cone clutch though it works similarly. This clutch uses a pair of half round discs mounted to the center shaft at an angle and when you tighten the knob if forces the two disc apart locking them into the bore of the worm gear.? Oh and its also a bugger to assemble:-)
On Thursday, February 11, 2021, 10:04:54 AM PST, L Leonard via groups.io <metalmechanic@...> wrote:
Fixed the clutch. Seems the control knob didn't seat on the shaft shoulder which allowed the clutch thread to bottom out on the clutch.? Must have happened when she was new because there is no wear on any of the parts.? Works but very stiff. Awkward as well.? More tinkering to do I guess.? Pix of the open clutch included.
Larry
On Friday, January 15, 2021, 8:54:01 AM EST, L Leonard <metalmechanic@...> wrote:
Well, then, I have a problem.? When fully engaged the carriage does not move under power but does by hand.
the assembly seems to be bottomed out as it cannot be disengaged by hand.? there was no spring to apply back pressure to the clutch.? Is a puzzlement.
Larry
On Thursday, January 14, 2021, 9:56:27 PM EST, Dennis Turk <dennis.turk2@...> wrote:
Hi Larry
OK yes your Lot 5 has power longitudinal feed via the keyway in the lead screw that drives the worm? that drives the worm gear that houses the cone clutch.? The knob on the front of the apron tightens the cone clutch into the tapered bore of the worm gear.? All very simple and lot like South Bend Logan and other lathes of the day.
Dennis
On Thursday, January 14, 2021, 04:19:20 PM PST, L Leonard via groups.io <metalmechanic@...> wrote:
Greetings I removed? the lead screw from my lot 5 today for a good cleaning and , while I was at it, the apron as well. After removing 100 yrs of gunk I found................ no wear to speak of! no scoring, worn gear teeth, or sloppy half nut. I did find 2 small cracks in the worm gear carrier at the 12? o'clock position at its weakest point. I also found a cone clutch.? Is this used for turning?? If so, how does it work as I see no way to engage it. Anyway, the old girl is back together cutting threads like a champ. Any help appreciated. Be well Larry
Dennis Turk