Worm gear from bolt - video

Worm gear from bolt. By Maciej Nowak Projects. 8:07 video:

https://www.youtube.com/watch?v=ZIOn6w7gwWU


Previously:

https://www.homemadetools.net/forum/...360#post173292
https://www.homemadetools.net/forum/...986#post171820

Using a spiral tap in lieu of the standard four flute style will assure that the tap always stays in contact with the gear while forming the threads.

Ahhhahhaaa. By jove. Eureka.
In a distant galaxy, there is a lonely set of big 215 collets.
Attachment 38320
Acquired for a song, but misjudged as 2J's, (imminently more popular design) they await a spindle nose in D1-6. Alas, that beast is so elusive (expen$ive) and burdened with it's own 215 set, to cause a transaction.
Why not, TM51 said to himself, make a spindle nose? Despite pouring over gear-cutting tomes, solving acute angled pinions and rings is not a setup I can leave start to finish without interruption, it's a lot of teeth! So, haven't bought cutters yet either.
But there's more than one way to close a collet! Worm gear is a new solution. Room for everything; radial and thrust faces, grooved for lube, ID thread length, and a couple spares should last decades. It will increase overall diameter, shorten length, reduce weight.