DIY gear hobbing attachment for milling machine

**DIYSwede** · Jun 28, 2021, 08:55 AM

AndysMachines: Digitally (PIC chip) controlled synchronization between hob and gear blank, Pt 1:

**Paul Alciatore** · Jun 29, 2021, 01:15 AM

Oh, good grief! I am five minutes into the video and I can plainly see that we are going to have to watch it being made, piece-by-piece. With absolutely no explanation of what the design theory behind it is or what is going on.

AAAAAAAAHAG!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1111

**Ralphxyz** · Jun 29, 2021, 04:54 PM

I would like to know what the hole saw is?

Ralph

**DIYSwede** · Jun 30, 2021, 04:40 AM

Sorry Paul, for not informing about the non-informative, tedious and perhaps non-pedagogic process beforehand.
That said, I personally like following the machining sometimes just to see what decisions is being made when,
and try to figure out the ideas and methods used. For instance: Not a single carbide insert, "merely" HSS lathe tools used throughout.
I'm also biased in having some interest in DIY hobbing, and learned quite a few bits from it.
But then that's just me - and "to each his own" I guess...

Ralphxyz: Seems to be a run-of-the mill Sandvik HSS 60 mm OD hole saw*:

DIY gear hobbing attachment for milling machine-sandvik-hss-60-mm-od.jpg

2 cents

Johan

Note: *I'm NEITHER endorsing this particular brand, NOR waving any patriotic flag this time either...

**Ralphxyz** · Jun 30, 2021, 03:33 PM

The video must have been speeded up cause that run-of-the mill Sandvik HSS 60 mm OD hole saw cut through the steel like butter.

Ralphxyz

**DIYSwede** · Jul 1, 2021, 02:44 AM

Yup- the shot was indeed speeded up as well as cut/ POV changed three times.

**nova_robotics** · Jul 3, 2021, 10:19 PM

A PIC chip? Andy from Andy's Machines must be a pensioner.

All kidding aside Andy's Machines is a pretty cool channel. He builds lots of really cool stuff. The Terminator eyes video is pretty neat.

**DIYSwede** · Jul 5, 2021, 02:28 PM

Caution: NO drawings, sparse comments, some machining that might be disturbing to sensitive watchers.
Watching this video is NOT MANDATORY.

**Canyonman44** · Jul 5, 2021, 11:12 PM

Hey Nova. Might you have a more specific URL for Andy's Machines? Did the Google thing and all I got was professional business machine shops. Didn't seem to be what I was looking for.

PS Great job Swede!!!