Search found 1448 matches

by Greg_Lewis
Mon Feb 12, 2018 4:22 pm
Forum: Live Steam
Topic: Foundry Pattern Making
Replies: 19
Views: 991

Re: Foundry Pattern Making

If you're going to use a commercial foundry, be sure to check with them before you start. They may have specific requirements or suggestions.
by Greg_Lewis
Sat Feb 10, 2018 9:24 pm
Forum: Live Steam
Topic: Metallurgy of Steam Engines
Replies: 21
Views: 857

Re: Metallurgy of Steam Engines

A number of years ago, and I believe it was here on Chaski, there was a discussion about smoke boxes and materials. Temperatures were measured on various locomotives and some were in the 700+ (F) range and others only 550 degrees. I do not remember if this was also related to coal, oil, or propane ...
by Greg_Lewis
Thu Feb 01, 2018 10:03 pm
Forum: Live Steam
Topic: will spring steel mill?
Replies: 22
Views: 991

Re: will spring steel mill?

Holes can be drilled with a carbide spade drill. I did that with a 1/8-inch bit. Make up a fixture that's essentially a sandwich of two bits of steel top and bottom with the spring steel in the middle. Make a guide hole in the fixture, then drill through the spring steel. I did many leaves that way....
by Greg_Lewis
Thu Feb 01, 2018 4:25 pm
Forum: Live Steam
Topic: Need some speed tips for getting a project done faster.
Replies: 99
Views: 2788

Re: Need some speed tips for getting a project done faster.

For the 00-90 and 0-80 taps, I use a pin vise to hold the tap. More sensitive feedback, and since you are turning the tap by the small diameter of the pin vise compared to the relatively large tap wrench, less chance of breakage.
by Greg_Lewis
Wed Jan 31, 2018 11:58 pm
Forum: Live Steam
Topic: Need some speed tips for getting a project done faster.
Replies: 99
Views: 2788

Re: Need some speed tips for getting a project done faster.

I'm still confused about when to throw away taps. To me a tap has always either been good or broken off. Do you mean the tap will have more drag when backing up? Taps will get dull just like any cutting tool. Experience is the only real way to know when this has happened. Try to get a feel for the ...
by Greg_Lewis
Sun Jan 28, 2018 12:28 pm
Forum: Live Steam
Topic: Need some speed tips for getting a project done faster.
Replies: 99
Views: 2788

Re: Need some speed tips for getting a project done faster.

You buy 3 sets of taps and dies at a time? Do you put even wear on each tap in the sets before you toss them? Or do you favor some and put little wear on the rest? I'm a heavy user of the 1/4", 3/8" and 1/2" drills simply because they fit in those collets. I should have been more specific. For the ...
by Greg_Lewis
Sat Jan 27, 2018 9:04 pm
Forum: Live Steam
Topic: Need some speed tips for getting a project done faster.
Replies: 99
Views: 2788

Re: Need some speed tips for getting a project done faster.

So help me understand this setup. Each row of the same size tap is so you can go progressively deeper into a blind hole, the smaller drill is what you use just before the taps and the bigger drill is larger than the thread diameter for the bolt to pass through it? This isn't your only drill set is ...
by Greg_Lewis
Fri Jan 26, 2018 11:28 am
Forum: Live Steam
Topic: LITTLE ENGINES
Replies: 86
Views: 8908

Re: LITTLE ENGINES

... My personal take is that somewhere in the middle is the real answer, in that if you make a CAD drawing of an engine, it probably is YOUR copyright, not the person who drew it by pencil & paper, ... If it is reduced to a rendered view, or series of rendered views, then it is no different than ta...
by Greg_Lewis
Thu Jan 25, 2018 10:29 pm
Forum: Live Steam
Topic: Got an opportunity for materials right now. What to take?
Replies: 8
Views: 532

Re: Got an opportunity for materials right now. What to take?

The basic law of materials is that any piece you already have will be 1/2-inch too short for what you need. Seriously, I guess it just depends on what the stuff is, what you know you will need, and how much storage space you have. I quit the "just in case" ideology because the storage space was gett...
by Greg_Lewis
Thu Jan 25, 2018 9:34 pm
Forum: Live Steam
Topic: Got an opportunity for materials right now. What to take?
Replies: 8
Views: 532

Re: Got an opportunity for materials right now. What to take?

Sounds similar to the stuff I just cleared out of my shop after hanging onto it for 10 to 20 years. Take it all, keep it for 20 years, and then throw it away.
by Greg_Lewis
Thu Jan 25, 2018 3:06 pm
Forum: Live Steam
Topic: Need some speed tips for getting a project done faster.
Replies: 99
Views: 2788

Re: Need some speed tips for getting a project done faster.

Speaking of taps and dies, something I wish I'd done when I started was to standardize on thread sizes. I've got just about every conceivable thread and diameter somewhere on my engine. While certain threads are advisable for different materials, in places where they show or where there are thin wal...
by Greg_Lewis
Thu Jan 25, 2018 2:56 pm
Forum: Live Steam
Topic: Need some speed tips for getting a project done faster.
Replies: 99
Views: 2788

Re: Need some speed tips for getting a project done faster.

A long time ago I also made a hardwood block for a complete set of taps from 0-80 up to half inch, plug, taper and bottoming in both NC and NF (NF isn't as complete in the small sizes because I don't use it as much). This makes all the taps readily accessible and you don't have to worry about dulli...