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This looks incredible for a first machining exercise. I'm also working on something right now (Elmer's #24), but I was thinking of doing the SS next. Maybe I'll be able to catch up to you before you start again. Probably not, as I'm more of a "set up and drill a couple holes per night"-speed...

Ah, someone on the NEMES mailing list pointed out to me that the appendix lists C and S as meaning close fit and smooth respectively. Still no idea about the mystery holes, though. Maybe for mounting to a wooden base? Doesn't seem like they'd have to be through holes for that.

The ST05G looks interesting, but I think the site is abandonded or something. The front page says the plans are a free download but when you click through they are $100 or more. The forum is nearly empty. Also, they say it "can be built in any up to date workshop with 3- or 5-axis machining...

On page 3 of the PDF, look at the base. I have two questions about it: 1) What are the "drill 1/8" holes about? I can't figure out what is supposed to go in those holes. Worse, looking online, I see one person tapped them for some reason, but the end of that article doesn't show them screwing...

Did you ever build the Stirling Steele? I've been looking at it too, but I can't find many people online who've built it. I don't know if that's expense, difficulty or just nobody wants a low-to-medium power stirling engine?

Heh, I just now came up from the basement. Working on a magic trick by request of my son. I'm close to finishing, but if I keep working I'll have to start over. I'm sure you know what that's like.

Aha, great idea! And I wouldn't ever have even understood this solution if I hadn't the problem myself. The more I learn, the more I realize that I'm just expanding my frontier of ignorance and need to iterate over the entire thing again to push it out farther.

I'm afraid I didn't get the bit about the drill bit used as a spacer. I couldn't tell what it was spacing or what it was supposed be centering.

Got all my linkage parts machined And here's a whole pump. It even works! Kinda! Now I begin tweaking parts so it works better. Bigger slots in the pipe to let the water out Lengthen the piston rod so the 1" stroke happens farther down (i.e. completely south of the slots) Add the return...

I drag my feet on posting these because it's all so terrible and slow compared to the awesome stuff I see here. But it also keeps me honest and working on it, so anyway. The bracket that'll hold the pump mechanics to the pipe is done I also made up the pumping arm and...the rod that comes...

I need to try cutting curved slots pretty soon.

Maybe so. After a great deal of raucous meowing.

I thought I could knock off that L bracket in an hour or two this weekend. Boy was I ever wrong. It took me an hour just to hacksaw the basic shape out of 1" thick stock. And it's aluminum! (Maybe I shouldn't admit that.) Another little while to clean up the saw marks. Next up is boring the...

I've been wondering how people are doing this! But how are you guiding it around the corners? Just by hand or is this CNC? Also the setup is pretty genius. I would have done some dumb two-part thing by holding it vertical and then laying it down to put the radii in the corners.

Some background. tldr: I want to make a manually operated, 100% mechanical water pump for my cat who will only drink running water. The goal is about equal parts hilarity and shop-time, with a distant third of making an actual working device to be operated by a cat. Step 1: A check valve...

I had an idea like this after I rejected the flywheel. Kind of like one of those kids' tops where you press the handle down to spin it up. It doesn't care how spastically you press or how far, it will speed the top up. I actually did succeed in making a "pump" the other night. Two check valves...

I consulted with a mechanical engineer last night. We spent some time going over the nuts and looking stuff up. There's a "USA" stamped on the bearing-side of my sample ones as well as a "W" in a diamond. We thought that could be some kind of treatment marking. But it could also be a...

Don't forget to search for the "light 10" aka the "10K" as well. Same bed, different swing. And ebay probably isn't a great place to search. You have to compete with the entire world there. Craigslist is much more local. But even then, I watched for a year before I got my lathe..and it wasn't...

Hey, I came up with that concept the other day too! I didn't know anyone had actually done it.

If I have to make my own to get nice ones for special occasions/my own use, I'm fine with that. But I want to know HOW.