this post was submitted on 22 Oct 2024
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127
Chris Borge – They printed a better lathe (using concrete in a 3d printed shell rev 2) (i.ytimg.com)
submitted 1 month ago by j4k3@lemmy.world to c/3dprinting@lemmy.world
11 comments fedilink hide all child comments
 

https://www.youtube.com/watch?v=6Js8erWbsDQ

video description text:Want to see more tools like this? Im a finalist in the Prusa awards and winning would fund literally dozens of tools like this and help me keep the files free!

https://www.printables.com/awards     (vote for the ball vise, its bright orange :) )

Parts: Uploading tomorrow morning

Music: Minecraft soundtrack

Like subscribe all that stuff

0:00 intro

1:12 build

4:30 concrete time BAYBEEE

6:01 ready to use

9:58 thoughts My name is Chris, I am a 3D printing hobbyist from australia. I dont really specialise in anything specific, but 3D printed tools and tabletop accessories are some things youll probably seen quiet often. I do all my 3d printing on a Ender 3, which I highly recommend as a budget printer. Currently I only run 1 printer but I hope to expand that in the future. Recently acquired a photon 0 to do resin printing with. I like to share all my 3D printing ideas for free although I do plan to sell stuff in the future. Most of my projects will be mostly 3D printed with a few non printed components included, these can often be found on ebay. I actually use the cheapest filament I can get for all my projects, again I hope to change this in the future.

I've been watching Chris' lathe builds for awhile. This concrete pour seems like a really useful idea. The lessons learned and advice given here are valuable insights into the practical aspects of this technique.

My main underlying curiosity is what happens when such a methodology is used to create automated single purpose machines.

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[–] Badabinski@kbin.earth 20 points 1 month ago

Man, that's cool! Concrete is a heck of a lot cheaper than epoxy granite resin and is perfectly suitable for a low-precision tool like this lathe.

I do hope that he finds a way to shield those bearings. You really don't want metal chips or sawdust making its way in there. Any damage they sustain will cause runout, which will lead to increased chatter and parts that are out of spec. Plus, a matching pair of tapered roller bearings can be quite expensive!

EDIT: to be clear, I mean no disrespect when I say low-precision. Not every lathe needs to have slides and handwheels. I have a little Sherline lathe that I've used like this in the past (using gravers, not tools in a tool holder). It's great to quickly turn something or to put nice decorative details on a part. Precision is possible with a lathe like this, but it requires fairly strenuous effort.

[–] bluGill@fedia.io 10 points 1 month ago (1 children)

Nice, but be sure to check out the Gingery lathe (and the whole series) before building - Gingery did a few things that would improve this if done. (and this does a few things that would improve what Gingery did)

[–] j4k3@lemmy.world 4 points 1 month ago (1 children)

Casting is much harder to access now in many urban settings. I wish I could but have no space for it where I live.

[–] bluGill@fedia.io 5 points 1 month ago (1 children)

I said check out his book, not follow his patterns. There are some great ideas in this build, but also some things Gingery did better - and since Gingery explained why he did a lot of things like he did you will likely in turn be able to adapt the good ideas to this build. The way Gingery does the head stock is much better than this cast in place option for example. Combine the two and you will get better results.

BTW, if you are serious about building a lathe I'd recommend epoxy-granite not concrete or castings. Something more to research before building (or maybe just stop someplace and build - your choice)

[–] electricyarn@lemmy.world 8 points 1 month ago* (last edited 1 month ago) (1 children)

Where did you say "check out his book?"

[–] ExcessShiv@lemmy.dbzer0.com 7 points 1 month ago (1 children)

They didn't...

[–] bluGill@fedia.io -1 points 1 month ago

It was implied

[–] Boomkop3@reddthat.com 5 points 1 month ago

That is heckin cool

[–] YeetPics@mander.xyz 5 points 1 month ago

This is the ball vise fella, right?

Dude is a legend

[–] bluewing@lemm.ee 4 points 4 weeks ago

Concrete lathes are far from a new idea. During WW1, the US needed more lathes than we had. It could take years for a cast iron casting to age enough sitting outside before you could do the final machining to actually build a lathe.

So concrete was tried as a substitute for cast iron. It has some good properties, it cures quickly, is rigid enough, and dampens vibrations pretty well. The downsides are you require a physically larger machine that takes up more floor space, and they are difficult to move making resale difficult, and they don't last as long in that usage, so they aren't cheaper in the long run.

Concrete lathes had their day and quickly died out to be forgotten.

[–] HootinNHollerin@lemmy.world 4 points 1 month ago

Holy shit