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I would have ran a screw next to the slide bar with a gear to change the distance of travel. Smaller gear with a idler gear to take up the space.

looks a lot bigger than an inch and 9/16

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Any one knows what the id of the crank case is?

I don't know why they would call it a space engine when it needs air to operate.

Some of the math I been doing which is 35 (sfm). My speed should be 28 rpm. But that depends on the type of metal being milled. That's a lot of pulley changing. I have a auto-transformer. But I think I going to have to hook up some type of tachometer. What about vertical mill's they run at...

Looks like I need to get that book. The large blade I have is 6 to 8 in. The blade you see in the pic is 5" the I dulled was 6" But I seen slitting blades on here look like it was ran above 1750 rpm.

The smallest pulley on the motor is 1"in" the spindle shaft pulley is 3 "in" making the cutting tool rpm to only 583. The motor run's at 1750. So that should be slow enough for the tool.

This is what I built. The only problem I have had was dulling the blade on steel which is funny considering it is a HHS blade. The one thing I didn't know was the support arm was to be solid steel bar. The knee adjustment was an old screw jack inverted and welded in place also making sure it was...

I have a sears craftsman lathe from the 60's 6in beautiful machine. And a Harbor freight lathe from China "junk" I have to be constantly working on it to keep it going! I built my own horizontal mill from two heavy channel iron. The first thing you have to do is make sure it is very square at...

What does this (With regards to holding long lengths in a collet Smart & Brown lathes used a system that had a tubular draw bar to close the collet via a hand wheel on the end of it, I seem to remember it having about a 1" bore but I don't recall the taper. (it was 50 years ago) have to do with...

What pic's? All I get is a pic icon with an X over it.

Right now I am melting Aluminum and building steam engines. I want to work my way up to steel but for that I need to make a new furnace the one I have now won't last long at those temp's. My clay crucible has crack in it but it seems to still be able to work. I remember in high school the...

I am around 10 to 15 psi. I might have to back that down or open the orifice a little. I have a number 19kg and 24kg crucible but there graphite/clay you're the same?

I used a number 60 drill bit on my burner and it seems to small. I don't get the constant wore but a pulsating sound. And what type of crucible are you using?

Where did you get the broaching tool?

You're right air matters. And the more pure the oxygen "which you are using" the hotter

Well I tried to cast a piece of old gas cap for a friend that help me out a lot. but one my sand slide out of the drag and the sand sticks to the cap even after I put parting powder on it. Going to try tomorrow after the sand dries out a little

Look at Keith Appleton video's on YouTube. You'll see allot on steam boilers. How their made, their working pressure and what kind there are. ex sample one is heated by rubbing alcohol. Silver soldering and repairing them. He even show one that been riveted but I don't think he did it. There's...

If I build something I plan on putting it to use. I worked on Electronics talk about getting the satisfaction from what you build. But I still won't build it unless I plan on putting it to use. All the engineers and inventors didn't build what they built unless they plan on putting it to use...