Machining a tiny screw - video

**Jon** · Feb 18, 2023, 01:19 PM

Machining a tiny screw. By Chronova Engineering. 4:32 video:

Previously:

The Secret Life of Components: Screw Threads - video
CNC machining a titanium screw - GIF
CNC grinding a bone screw - GIF
Concealed wood screw technique - GIF
"Impossible" screw - video
1871 automatic screw-making machine - video and photo

**TrickieDickie** · Feb 18, 2023, 04:46 PM

I thought he was going to cut the threads with a pointy tool

**Toolmaker51** · Feb 19, 2023, 08:31 AM

Originally Posted by TrickieDickie

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.
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?

**TrickieDickie** · Feb 19, 2023, 08:45 AM

Indeed, Toolmaker. I know little about clock lathes but it would have been entertaining to watch the hustle for such a short cut.

**Toolmaker51** · Feb 19, 2023, 02:29 PM

Originally Posted by TrickieDickie

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.
I miss that lathe.

**Frank S** · Feb 19, 2023, 09:03 PM

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

**Toolmaker51** · Feb 20, 2023, 08:11 AM

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%).

**Frank S** · Feb 20, 2023, 08:46 AM

Originally Posted by Toolmaker51

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.

**Toolmaker51** · Feb 20, 2023, 08:55 AM

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.

**Frank S** · Feb 20, 2023, 10:27 AM

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.