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Machining a tiny screw. By Chronova Engineering. 4:32 video:
https://www.youtube.com/watch?v=wKVqLTzh_z4
Previously:
https://www.homemadetools.net/forum/...739#post201901
https://www.homemadetools.net/forum/...568#post197364
https://www.homemadetools.net/forum/...598#post193379
https://www.homemadetools.net/forum/...551#post162618
https://www.homemadetools.net/forum/...709#post123832
https://www.homemadetools.net/forum/...3143#post98162
I thought he was going to cut the threads with a pointy tool :)
That would take some considerable engineering to cut single point, even more to read the chasing dial.Quote:
Originally Posted by TrickieDickie
Without a relief cut, coordination to back out? I don't know a fitting term...
I suspect dies predominate; are any watch lathes equipped with feed screws, let alone lead screws?
Indeed, Toolmaker. I know little about clock lathes but it would have been entertaining to watch the hustle for such a short cut.
Hustle indeed. I single pointed 2 TPI in a Pratt & Whitney lathe, lowest RPM was 16. Part was short and even with thread relief, chuck clearance an issue. Ended up without gouges in the compound.Quote:
Originally Posted by TrickieDickie
I miss that lathe.
Back when I had my Victor 16-40 toolroom lathe, the smallest thing I ever tried to single point was 4- 3" long 3/16" dia. riser studs 1" long 4-40 one end 1/2" deep female the other, chickened out when the thread was about 75% complete finished with a die, tapped the female end. A lot of lathes don't seem to have a good fit for me. but that one did after I mounted it on a pad 4" above the floor.
Some of you know what I mean by a good fit. For me it is a combination of height and controls design and placement
First ran a like Victor in Huntington Beach CA, mold repair shop. Compared to most Asian imports, it had few shortcomings, with several obvious, valuable features. The full iron bed and multiple feed kick out cams deserve a place on (almost) every toolroom lathe. Speed range of geared headstock was adequate, save the narrow precession of highest RPM low gear and lowest high range; for 8-12'' diameter J20 steels, (140% vs 160% 12L14, 1212 is 100%).
Sorry; but, IMO there is no true "Victor like" it is either Victor or an imitation some better than others. Maybe because mine was equipped with a 7.5 HP 2 speed motor and had 3 extra change gears to do metric as well as inch threading plus the uncommon threads like 27 TPI. and was gap bed. Its few short falls to me at least was the bed width and the length of the carriage wings, and the lack of pressurized oiling. It could have benefitted with a longer stroke tailstock. The spindle stop was great but could have been clutched I liked the D1-6 chuck mounting. and I had a collet closure attachment for running 5C collets.Quote:
Originally Posted by Toolmaker51
Lol, it wasn't 'Victor-like', a true Victor lathe.
The importer for whole coast was South Bay, maybe Gardena, Torrance; right along IIRC 405 Freeway. There may still be the warehouse, sporting a very similar logo. They branched into sales of tooling, under something.com
Someone in the region will likely pick up on that reference.
my dyslexia put the "like" after victor completely changing the meaning being the same model machine to that of a machine with similar characteristics.Quote:
Originally Posted by Toolmaker51
Knew that friend; internet being what it is. Think it's important to convey what might benefit lurkers ages beyond the present day. It's possible they'll be rebuilding shops, out of what we've started collectively. We're lucky to ride along with nearly direct contact to Industrial Revolution, the beginnings of mass production, production during WWII.
They might not.
re Victor Lathes; I'd place them among best of the class under Mori Seiki, Okuma, (certain) Tsudakoma, etc; which isn't bad at all. That group is Webb, Cadillac, Tsudakoma, Izaki (Okuma license), some old ENCO's, early Jet; not just a few really good machines.
(edit) I doubt any will run across one, a real surprise in the Herter lathes. Imported by a company in Compton CA, it really presented a handful of goodies; as if a qualified lathe engineer cherry-picked all the Asian output for best features. It would rate higher but only saw one in 50+ years to gauge by.
Might be able to expound lathe features hours on end; boiled down its about footprint, envisioned use, budget and what present tooling you have to support it.