I noticed that to.

Good eye

i noticed the same thing but i assumed it was just because he didn't lock the spindle on the diving head during some passes. you can see at 20:20 the spindle is unlocked; he locked it again. then again at 21:41 its unlocked. in the previous video at 16:58 you can see the part wobbling as it is cut and the spindle is unlocked as well.

I think it was an optical illusion. If you look closely the following cuts at 10x speed do not show any movement! A better setup would be a dead stop in the dividing head to back up the work JIM 😮

I noticed that too, he needed to reset the center.

If there was some minimal run out. I would think that can be a good thing. As the gear cutter wears down. The other gear cutter teeth will then start cutting the metal.

CEE in Oz do even better with comments coming in thick and fast, but I've always liked the fact that Keith does these older bits of kit and makes xstuff like this from scratch.

@@billdoodson4232 CEE bulldog scares me.🤣

@@fls360 I know what you mean. The "Safety Officer" manages to shred some impressive doggy toys.

Probably got a better roll on the spacer stack this time - defects canceling each other out rather than adding up. :)

23:00 could see some flexing of the part as if center wasn't engaged or dividing head chuck wasn't tight.

No wobble in the arbor, but there IS wobble in the gear end of the piece itself. Perhaps the centering hole is not contacting the center support enough? 🤔

@@brand-x7049 Exactly! You are spot on. I fought with the spacer stack for many years. It is sure nice when they line up and get the run that Keith has here!

I imagine that is flex in the material.

@@Drottninggatan2017, Self centering. Lol

Your computer screen needs some supports!

@@paulcopeland9035 My "Computer screen" is a 32" 1080p HD TV at arm's length. It sits on a VERY sturdy desk. I was commenting on the *relative motion* I saw between the TS support and the workpiece. Which apparently Keith noticed also because later in the video it is not present.

Was going to say the same thing

I’ve been wondering and asked the same questions, I would like to see how the stoker engine challenges are overcome!

It never fails!!! The stoker/bandsaw guys never give up.

@@paulcopeland9035 neither do trolls from their mothers basements!

This is not a production project. He is reproducing vintage machinery, as is the name of the channel!

@@paulcopeland9035 you missed the point of the question as to the original maker of the part . As to why it was one piece and not two. Keith showed the amount of time it took to make the part in question .

Heat treating could introduce unacceptable distortions. That 4140 steel Keith used for the part is STOUT stuff and should be quite durable.

He said it might need it. It didn't!

No. 4140 is more than tough enough for this drill press project.

Nope. 4140 is tough. No need for the distortion of heat treat.

@@paulcopeland9035 Thanks for that information. I wasn’t aware of that.,

I've never seen a "wobbeling"!!

The spacer stack is lined up better for this gear cut.

@@paulcopeland9035 It still looks like the gear cutter is running truer.

4140 is plenty hard for this project.

@@paulcopeland9035 Depending on the application that may, or may not be the case.

You ask every video! Your tenacity is to be admired!!

@@paulcopeland9035 Yes, and I am hoping to get an answer someday. But until then, all I can do is keep asking.

1:00 look close you'll see both ends are painted yellow

@@LanceMcGrew I thought 4140 was dark green?

Water soluble oil coolant can have a form of bacterial infection an anaerobic bacteria the kind that make stinky gases. Some of the newer sol-oil formulations contain an antimicrobial agent or an entire cast of antimicrobial characters some doing the non oxygen-breathing the anaerobic and some doing the aerobic bacteria. Ridding the surface of tramp oil in your sump makes for a better pump. This amorphism is still as true today as it ever has been. Check out the systems in use, in some cases a year. Unless you have an ongoing or chronic problem with stinky sump syndrome, it can sometimes be as easy as just tending to the tramp oils on a daily basis and aeration. There are good solutions for ridding your coolant system of bacterial infection. There are many material considerations involved and reactivity of various metals to various chemicals comes into play.

Get some rest, quit bitching, and turn off the video. You need some quite time to continue your perfect life!!

What is it about the gear that you wouldn't trust?? This is for a drill press, not an F1 engine!! That gear will work perfectly for another hundred years. Quit bitching or just go to another channel. You won't be missed!