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Rex Krueger
Rex Krueger

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Sneak Peak: The real lathe project

Friends: 

I've been putting out a lot more content since I went full time, but I could do more to tell you about future projects . 

I've been thinking a lot about lathes recently. The longer I use one, the more I find it an essential tool. This sounds a little weird, right? Woodworkers use lathes for chair spindles and decorative bowls.

That's true, but they can do so much more. 

Lathes allow you to make precise cylinders, drill holes in the exact center of things and even turn spheres. I've used my cheap Harbor Freight lathe to work with acrylic plastic, corian, and even copper tube. I also use it for dull-but-essential things like making spacers or simple bushings. The lathe was at the heart of the entire Industrial Revolution and home crafts-people could be using them for so much more. 

But they cost a lot. My "cheap" lathe goes for over $300 and that doesn't include tools or a grinder. Home-game woodworkers need something more affordable. 

I guess we'll just have to build it. 

I'm not the first to have this idea. Matthias Wandell has built a brilliant little lathe that even uses wooden bearings and can be made in an afternoon. 

And Izzy Swan will teach you how to make a lathe out of an old drill in about 30 minutes.

Both of these lathes are magnificent in their low cost and ease of construction, but they aren't as capable as we might like. They're both light-duty, small-capacity devices that can only do small work. They're exactly what their makers intended, but even my Harbor Freight lathe blows them away in size, power, and rigidity. 

We need at least this kind of power and performance, but at en even lower price. 

And if someone needs a cheap tool, I think I'm the man for the job. 

So, starting in October, I'll be releasing a series of videos where I build a REAL lathe from scratch using cheap and easy-to-find materials. This machine will have rigid construction, good power, large capacity and the ability to use common accessories like centers and face-plates. (I'm not sure about chucks yet. I'm working on it.)

The goal is to make something as good as my Harbor Freight lathe, but keep the cost at around $100, and even less if you're a good scavenger. 

In a lot of ways, this is the most ambitious thing I've attempted, but I think it's worth the trouble. 

Oh, and fun. It will be a lot of fun. 

Thanks to my Patrons for making these bigger dreams possible. 

Happy Monday; stay safe!

--Rex

Comments

No, these are new ones on me and I read a LOT of the history and philosophy of technology when I was writing my dissertation. Still, all this quality stuff just slid past me. Thank goodness for my Patrons.

Rex Krueger

Sweet. If you both like this, I trust you also know about James Burke's "Connections" and "The Day the Universe Changed" series? I'm so glad I became a patron. Great convo.

John Laudun

He showed up in my feed based on me liking one of your videos. Oh youtube and your funky algorithm

Matthew Leigh

thanks! can't say I did everything perfect, but spending a few weeks on design (I used Sketchup) and redesign was definitely worth it.

George B

Agreed. I have a nice 1hp motor from an old bandsaw. I plan on a jackshaft with an over-center lever for tension. My Dad has a vintage metal lathe with this setup and it's so convenient. Over time, the lathe will be upgraded to DC with speed control, but for now, I'm gonna run what I brung.

Rex Krueger

Man, these are all excellent points! I admit I've been thinking obsessively about rigidity, weight, lateral thrust, bearing mounts, and adjustments to align the head and tailstock. Great to get input from someone who's been there. I see that my biggest concerns are valid, as they're the ones you just listed. It's great to get ahead of these problems.

Rex Krueger

yeah, appliances are a great source for motors. Take note, however, that there are different types of motors with pros/cons to each: universal motors (found in most European washing machines), induction motors (common in the US or in quiet-running appliances) and also DC motors (mostly in treadmills). I recommend to salvage as many parts as you can - switches, power cords, filters etc. they are very useful!

George B

This is going to be an excellent series! yay!! I built myself a lathe from salvaged wood and parts. it's portable (can be knocked down and stored in parts) yet rigid and quite powerful. I also learned a lot from YouTube and other blogs. from my experience, the 3 most important (and challenging) things when building a lathe are: 1. Rigidity - in order to work properly, the lathe should be strong, not bend under force, and transfer the forces/vibrations well to the legs or ground. My lathe is anchored to my workbench (that weighs ~400lbs) with bolts, so it doesn't go anywhere :) . the tool rest must also be rigid and strong. 2. Accuracy - the head and tail stocks must align exactly on center, not wobble and stay straight all along the bed. For me this was the biggest challenge because I don't have power tools and built everything with hand tools. in reality, a small misalignment in the tail stock is not that bad, but wobble is a big no no. 3. power transfer and motor control - it depends on the type of motor you have and the quality of bearings and other mounting parts. I used an old induction motor from a clothes dryer, so I couldn't control the speed (VFDs are expensive). I used pulleys (like Matthias). I also took time to design a safe control box. A simple on/off switch is not recommended - it's better to have an additional emergency switch, and also an EMF filter to protect the motor and your home from noise and voltage/current spikes that are inherent to motors. I salvages mine from an old washing machine, with some extra parts off eBay (2$ for most electric sockets and switches). of course there are other fancy features such as adjustable tail stock, live centers etc. I tried to build them myself with partial success, but some of them are selling cheap on eBay/AliExpress.. looking forward to see the progress, extremely exciting!

George B

Holy Crap! This guy rules. Subscribed!

Rex Krueger

The Machine Thinking channel has a few videos on that theme. <a href="https://youtu.be/djB9oK6pkbA" rel="nofollow noopener" target="_blank">https://youtu.be/djB9oK6pkbA</a>

Matthew Leigh

You're going to dig it. Essentially he argues/documents that it was the machinists, and their ever more precise lathes, which made the scientific revolution possible.

John Laudun

Now that I think about it, the nature of the program you've laid out should let someone like me follow along, and change what needs changing. Looking forward to it.

John Laudun

Hm. Interesting point. I am planning on a pretty big lathe. Not something that's easy to stow. Then again, I can present some other options for smaller construction. I was planning on a 42-inch bed, but other people could always make it shorter and thus much more movable. I'll keep it in mind!

Rex Krueger

I've never heard of that book. To Amazon!

Rex Krueger

Also, I kept hearing echoes of Witold Rybczynski's "One Good Turn: A Natural History of the Screwdriver and the Screw" in your post above. It's a small book, and I bet you'd like it.

John Laudun

Awesome idea. And, if I may, I'd like to throw one possible addition to the design brief: stow-able, or at least a table-top. The problem for someone like me, and perhaps others, is that I just don't have room for a lot of standalone, quite literally, equipment.

John Laudun

oh never thought of appliances.

Aaron Sprague

Cool. My brother always says "if it's free, it's me." Words to live by. Also motors are so abundant that they can be almost free. Check Craigslist or look around for old appliances. Washing machines have beefy motors in them.

Rex Krueger

A good point. I'll be sure to cover it.

Rex Krueger

Nope! Part 2 went up weeks ago. Pay attention, man!

Rex Krueger

I am excited for this one. I recently got a new in the box 12 inch lathe for free. It is a 30 year old Sears brand but some one took the motor out 😠

Aaron Sprague

And you still owe part 2 of drill presses

James Boatright

Don't fail to reference those others tho. And explain WHY you want more

James Boatright


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