habu68

Is the equipment specialized? I was under the impression that the pellets could be shot through normal sand blasting equipment.

Has anyone here used dry ice as a sandblast medium? will it remove scale? As i understand it the friction of the blast causes an explosive sublimation (changing from a solid to a gas) that is a very effective blasting medium. without the clean up of sand. I have found a source for the pellets and understand that they need to be used quickly.

Questions
Safety issues.
effectiveness
Other input

It is wonderful and reminds me of a song that brings tears to my eyes every time I hear it.



Who Will Watch The Home Place




Leaves are falling and turning to showers of gold
As the postman climbs up our long hill
And there's sympathy written all over his face
As he hands me a couple more bills

Who will watch the home place
Who will tend my hearts dear space
Who will fill my empty place
When I am gone from here

There's a lovely green nook by a clear-running stream
It was my place when I was quite small
And it's creatures and sounds could soothe my worst pains
But today they don't ease me at all

In my grandfather's shed there are hundreds of tools
I know them by feel and by name
And like parts of my body they've patched this old place
When I move them they won't be the same

Now I wander around touching each blessed thing
The chimney the tables the trees
And my memories swirl 'round me like birds on the wing
When I leave here oh who will I be

The -blower from a defunked (sic) dish washer is what i use on both my small coal forge and as a booster on my gas forge for welding. For a gate I use a lid from a can of beans over the intake using one of the screws on the blower housing. i also use a "dead man" foot switch to save coal.

9. But remember, that there are no orange kangaroos in Denmark.

Depending on how you ask the questions, you can force the answer you seek! Remember 43% of polls are wrong, the other 78% are made up! Don't jump to the answer, just scroll down. Take this test mentally, don't write down your answers, and don't shout them out.

1. Pick a number from 2 to 9. It can be 2 or it can be 9, or any number in between.
2. Take that number that you've chosen, and multiply it by 9.
3. That should give you a two digit number. Take those two digits and add them together.
4. Take the resulting number and subtract 5 from it.
5. Take that number and correspond it to the alphabet, numbering the letters. A =1, B=2, C=3, and so on...
6. Take your letter, and think of a country that begins with that letter.
7. Take the last letter in the name of that country, and think of an animal.
8. Now, take the last letter in the name of that animal, and think of a color.

After you get your answer check the next post

Jane bumped into Peter.

and peter jr :D

Jane Higgins was walking down the high street when she bumped into an old friend. "Hello, I haven't seen or heard from you since graduation back in 1982!" said Jane, "what's happened to you?"

"Well, I got married in 1989 to somebody you wouldn't know. This is our son", said the friend who was holding hands with a little boy.
"Hello and what's your name?" said Jane to the boy.
"It's the same as Daddy's".
"Ah so it's Peter is it?" said Jane

How did Jane know?

Not necessarily 45

Not sure about this answer but it would be close enough to "exact" for me.

Fill can full.
Empty half of the water out by tilting the can to 45 deg.
Mark the half full mark
Eyeball and mark halfway between the bottom and the half full mark
Fill to that mark

very close

pun intended

Can you do it?
You have a cylindrical can of the sort that baked beans are sold in. You want to fill it exactly one quarter full of water but you have no measuring instrument and the can is not graduated in any way (though you can scratch it yourself if you wish).
How should you proceed

Uneducated speculation, Trying to think as a workman that is set in his ways:

It seems that the slow change to all steel tools might have been costumer driven. Under an apprenticeship system, the student would learn from his master that the only "good" axe was one with a laid in steel bit. The wrought head gave toughness, while the bit could be sharpened and the blacksmith could re-lay the bit when it was worn. This, he was told, was the standard of a quality tool. The use it up, fix it, wear it out mentality of the time may have gone against the logic of an all steel tool. It would also seem to the workman that as the blade was sharpened beyond the hard portion of the bit the workman might notice that the blade would no longer hold an edge, this may have caused demand for the older style even though there was a "better mouse trap"

The Davistown Museum Handtools in History Series

Volume 6: Steel and Tool Making Strategies and Techniques before 1870
Volume 7: Art of the Edge Tool
Volume 11: Handbook for Ironmongers A Glossary of Ferrous Metallurgy Terms
18th and 19th Century Toolmaker Information Files
Collins & Co.



additional reference citations
The Davistown Museum Axes Bibliography
excerpt


The Davistown Museum Complete Bibliography

Dang it Ice Czar you've done it again..

The story goes that the old blacksmith offered to Loan the use of his mule, and placed him in the paddock. Once the calculations were made they no longer had need of the mule so the blacksmith collected his money and his mule and went back to his smithy. Still grinning.

17 horses

It was a slow year in the village, and the lawyers, bankers, and accountants, (not having real jobs) all fig'ed, scratched, and calc'lated. But the old blacksmith and his mule just grinned.

True or false
Pi r sq

Ans: False
cornbread r sq, pi r round!

True or false
Pi r sq

now there was a farmer with 17 horses in his will he left 1/9th of his horses to his third son, 1/3rd to his second son and 1/2 of his horses to his first son. And $1000 to the person who could sove the problem with out a remaining horse(s) or partial owner ship.

this was told to me by a 96 year old man (hint it was solved by an old blacksmith with a mule)

Groucho Marx said: "I refuse to join any club that would have me

Here is a small punch press about 3 to 5 tons (estimated by me) note the size of the frame.
http://www.naabmachinery.com/images/Diamond.jpg

Brian, What you have drawn is a punch press, they use a crank shaft to produce the same motion. I think the problem that you will have is the same one you have with a punch press when it does not completely punch the hole in the part on the first pass. The full force of the fly wheel goes to the frame. The inclined plane of the screw allows the force to bounce as the fly wheel bottoms out. You haven't lived until you are standing next to a half ton of tooling when it comes apart and falls on the floor. If the tool locks up without breaking the frame it will be a real job to reverse the cam on the piston. look at the spring system on the little giant power hammer the springs allow the crank to pass through the dead stop while storing the excess energy that would snap the frame. Idea, use a auto crankshaft, bearings and make rods to fit. Good thinking outside the box.

Foundry, casting and blacksmith instruction. International Library of Technology ... - Google Book Search

now they make 2x4 and 2x6 with finger joints. You can break them to length over your knee. their structural strength comes from the application of the drywall.

This may be a little left-field, but does the thread neccesarily need to be cut? Would a wrapped-and-brazed thread like on old vises work I wonder?

Would it be Possible, yes, practical not so sure. Remember that when you wrap the threads that you are making both the threads for the screw and the nut, so you are trying to control 8 treads in a helix pattern, with constant pitch and lead. then you remove one set of four and braze them into the nut while maintaining that pitch and lead. Then braze and lap.
I once did a multi start nut on a screw from a garage door opener, when I was making a fast closing vice. I took a piece of square pipe and centered a short piece of the 2 start thread in it after I covered the tread with carbon from acetylene. (carbon acts as a release and spacer) I sealed the bottom of the pipe to a piece of pine with play dough and pored it full of babbitt. I had to lap the nut with valve grinding compound. I am not sure that babbitt would hold up under the massive forces of the fly press, but the same process can be done with a brass nut. That might solve half of the problem.

Fun with cans: remove the top of pop can inside the lip and cut the bottom off about 3/4s the way down. If you toss the can like a foot ball with a spin with the top as the leading edge it will fly like a Frisbee.