Just A 'SIMPLE' Repair

This video is sponsored by Shapr3D.

Ignoring the larger issues with the "new" lathe in favor of a simple project. Remaking the lead screw and nuts for the compound slide. Little did I know simple... does not mean easy...

#inheritancemachining #machineshop #hobbymachinist

Thank you again to the Micrometer level Patreon members listed at the end of the video!

TIMESTAMPS

0:00 Spoiler Alert
1:20 Le Probleme
3:30 Civility
5:29 A Worthy Investment
7:39A before B (but also C and D)
11:07 Trigonom-ish
13:08 Two Firsts
16:48 A Milling Problem But a Center Ain't One
18:27 Brrrr
20:00 Killing Time...
21:31 Climax
24:18 MOAR THREADS
26:39 Bringing It All Together

FAQ
Editing: Final Cut Pro X
Intro Song: Way Back Way Back When (Instrumental Version) - Gamma Skies

© 2023 Inheritance Machining, LLC. All Rights Reserved.

[boatbomber]

This lathe project might be my favorite so far! Super excited to see this old beaut restored to full glory. Excited to see what you make with it after that too!

[timderks]

I doubt anyone ever says this, but thanks for the high quality closed captions in your video. My hearing's fine, but for some reason I still prefer to have CC on, just to quickly read something back if I missed it or didn't understand it. It also allows for machine translated CCs, which may not be perfect, but are better than nothing for a lot of people. So thanks for putting in that extra effort.

[mec_pi]

Honestly it was a true stroke of genius to buy the lathe to create a need for all of the projects and i will be here for all of it.

[williamtaftt]

Super cool to see so many of the previous projects actually get used in this

[Raye]

blondihacks is one of my favorite channels. You and her have a very similar style -- showing the mistakes, explaining why, re-doing the work, puns and visual humor. Dig it.

[matusporubsky]

Hello good sir. Just a piece of advice from a blacksmith, when you are quenching a longer piece of metal such as in this video. Be careful with submerging it into the quenching fluid, to be more specific be aware of any side to side movements because this can sometimes bend the piece you are quenching. The chance of a machined piece of steel bending during the quenching process is a lot lower than on a forged knife but there still is a chance. P.S. yes i have ruined a knife this way : )

[thomasjensen]

I'm proud being a machinist, having you represent our trade : )
You give me ideas on different ways to use tools and setups, and give me insight on how to make stuff ive never tried before.

Keep the vids coming
Greetings from Norway

[bair]

Babe, wake up! New Inheritance Machining video just dropped!

[kkupsky]

Dude. The drafting is half of why I love this channel. Don’t stop the drafting or explaining it as you do it.

[shenkyeirambo]

i use a horizontal boring mill at work. the vertical acme screw has .211" of backlash, the x-axis screw has .127" of backlash, and the z-axis screw has about .165" backlash. you're not supposed to climb mill on an acme thread, though you can, but the amount of backlash means that any wrong cut can shoot the table or headstock sideways, potentially breaking the mill, the part, or the tool.

it's been this way for as long as i've worked there - nearly 10 years - beecause any time someone talked about the backlash in the machine, the nuts either got adjusted or they have been replaced a few times. all of the wear is in the screw itself, but my foreman only ever says it'll be adjusted. all of the work and wear is done on one part of the screw so the extremes you have to adjust to are near pristine.

i talked to my boss about it a few weeks ago, and the screws are finally getting replaced after what's probably been a large part of the machine's lifetime

[TheWeekendWoodshop]

Side projects are just extra projects. If you think about it, fixing this cross slide is just a side project to commissioning the new lathe 😉
Great video as always!

[SteelSurgeon]

13:35 You will probably never see this but Im going to throw it out there anyway. There are really only two options that are most likely here.

First, the thread is a 9/16-10 acme. 9/16 is close enough to 14mm that you could just be measuring a worn outer diameter to get this size. I find this the unlikely option, however.

The more likely scenario is this being a metric trapazoidal thread, TR14x2.5 specifically. The metric version of acme threads are called trapazoidal threads. The main difference between trapazoidal threads and acme threads, aside from the metric vs inch dimensions, is that acme threads are 29 degrees as you stated and trapazoidal threads are 30 degrees.

With the smaller thread at the end being a metric thread, my money is on this thread being TR14x2.5. It is highly unlikely that one part would have two different units of measurement used on it. The 2.5mm pitch is just close enough to 10 tpi (10 tpi = .100” pitch and 2.5mm = .0984” pitch) that you probably wouldnt be able to see the difference without a long enough gauge.

All that said, the problem I see that could arrise from this is the fact that if it is a trapazoidal thread, your compound dial graduations will now not be accurate do to them being calibrated (probably) to the 2.5mm pitch thread.

You can confirm this rather simply by setting up an indicator and checking the dialed movement vs the actual distance traveled of the compound. If you move the compound .100” and the indicator moves .100”, all is good. If you move .100” and the indicator moves roughly .0984”, well then you have a conundrum.

It would bother me. Not sure if it would bother you. I guess it all depends on how accurate you expect your compound to be. The issue is compounding error, meaning the longer the distance traveled by your compound, the more inaccurate it is going to be.

Edit: Dont just willy nilly trust what I am saying here, Ive given you enough info that it should be easy enough to do research to prove or disprove this. Im going strictly off memory/experience and my own math.

[wertyvk]

literally on a binge watch of all your vids right now, perfect time to add another one to the docket! love your stuff, really great insight into the production process!

[gillongname]

I love your side projects!
And as sad as I am not to see the box of shame, I'm happy to not see the box of shame!
Personally, I love seeing you learn new things, it makes me feel like I'm not watching a produced TV show, but an actual guy that is trying his best and keep getting better and better!
Thank you for all the hard work you put in the videos, you're doing a great job

[GuyMarsdenMakesStuff]

Brandon, this may be your best produced video yet! Every single shot is so thoughtfully framed and the pacing of editing is impeccable. Kudos. You set the bar unrealistically for the rest of us mere mortal YouTubers! 😮🙂

[andreibale]

The way you explain what you are doing is great to learn and to understand. You keep the voice quite neutral so its dedicated to what you are doing, plus you have humor. This way I can learn the most of it. Your and Matthias Wandels Channel (he is more into woodworking) are the best channels I currently know.

[dibbuk]

It is always a delight to watch a simple bit of metal turn into a finished unit.

[joeventura]

"If I only had a Then immediately builds one. You are a beast sir! BRAVO!

[jeff]

One thing I've learned from watching this channel and several others is that I don't have the math skills to be any sort of machinist. One tool just leads to another to make another and so on. It never ends.

[jobkneppers]

Brandon, pure magic here. Wonderful job, wonderful result. 3D CAD does have advantages for finding compound angles and a lot more. Accurate without the otherwise required math. Using the oldskool drawing board is also fun but when you need to get a job done for a living I go for the CAD solution daily. You're becoming a master in the trade! I enjoyed every second of this video. I also replaced a few spindles on my machines but bought a length of the required (left hand) thread at Misumi and loctited it into a working assembly. Nuts I bought too and modified them to the right dimensions. They perform fine for years now. I'm a jobber and I try to find the fastest and therefore most economical way to get my machines up running. But honestly I would like to have enough time to repair a spindle the way you did. It's so much fun and really satisfying to conquer all the challenges in your own shop and end with a better than new result. Hats of to you sir. All the best! Although not realistic I'm afraid; I wish everyone a happy christmas and a happy new year, Job