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I Forge Iron

John McPherson

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Posts posted by John McPherson

  1. FlatLiner, that is not torch damage, it is chipping of the hard face from missed blows and working cold steel on the edges.

    And yes, leaving it alone and using a square edge on another anvil, or making a hardy tool with square edges is the smart thing to do.

  2. If you go there in person, bring a file and a ball bearing, or small ball peen hammer.

    If the file skates on the face plate, but cuts into the body: joy. If both surfaces cut the same: door stop.

    75% rebound with the hammer or bearing in a rust and paint free spot: anvil. Less than 75% rebound, or dents from the test: Anvil Shaped Object (ASO).

  3. Not a face delamination, which would be horizontal, but a significant structural crack. Don't do any heavy work on the heel without getting it repaired. Or, just don't do any heavy work on the heel.

    Could be repaired by a tricky welder without hurting the face heat treatment at all. After gouging out the crack, weld the anvil upside down in a trough of water, with 1/2" of the face submerged. It needs to be several inches deep and gallons of water to be an adequate heat sink, with the face supported outside the weld zone, not just a baking sheet.

    The weight markings are 1 * 0 * 15, which translates as 1 x 112 + 0 x 28 + 15 pounds, or 127 pounds. Also known as 9 stone, 1 pound. Pretty close to 130.

    (And if you think the hundredweight (112), quarter weight (28) and stone weight (14) system was bad, try making change in pence, farthings, shilling, quid, etc.)

  4. From what I can see when I blow up the pix, there is about a 3" chip blown out on one side. So it is safe to say the face is still there.

    Call and agree on a price per pound or don't even get in the car, bring a scale, hammer or ball bearing and cash money, and be prepared to turn around and get in the car if he tries to renegotiate after you get there.

    9 hours ago, Chelonian said:

    I don't see much of a clear demarcation between the face and the body. Maybe that just means it's still well attached?

     

     

  5. If you have any large trees near the building, the top of the chimney needs to be 3 - 4 feet above the top of the roof line to assure a good draw.

    Look at any building from the 18th and 19th century when they cooked and heated with wood and/or coal, and built structures around the fireplaces and furnaces. Compare that to recent homes where the fireplace is an architect's cosmetic afterthought.

  6. OK, let me try again.  Not how to do a demo, (which I do appreciate) but who is responsible for what and when, step by step site opening to closing procedures, clock-in/clock-out, time sheets, inventories, key issuance, alarm codes and security rules, etc.

    Administrative oversight and guidance, in other words.  I need advice from the museum side of things.  Does anyone already have such a manual?

  7. OK, hive mind, I need some help. A local historic home/museum that I volunteer at has recently built a demonstrating smithy. Now they want to write a guidebook for the rotating cadre of blacksmiths that show up to operate the shop for tourists and school groups. Shop rules, things to make. Things NOT to make.

    Before we re-invent the wheel, does anyone have a document that they would be willing to share? A site online that has this already? My google-fu is weak on this one.

  8. There was a book on restoring tractors that recommended an ammo can (or oil drum) partly filled with kerosene and two weeks in the back of a pickup truck as a parts cleaner & rust breaker. Mo' travel on gravel = mo' better results.

  9. OK, so my high school German was waaaaay back during the Nixon administration, and little used since. You got me going, and I had to break out my google-fu skills. Not that there was a lot to find, and google translate does a poor job with dialects and idioms.

    It seems that "Krumbiren" is a Swabian potato recipe, or perhaps a regional type of potato that only Swabians can manage to make taste good.

  10. The square heel is typical of English anvils used for horseshoeing and general work, many European countries prefer the tapered square heel for architectural work. There are examples of each style found in all of the western world. Most major anvil makers provided both in their catalogs. 

    I can work on anything, but prefer a double pike. I recommend trying as many types and brands as you can when visiting others shops and attending hammer-ins.

  11. With any modern inverter unit, I find 2% Thoriated, Ceriated, or TriMix tungstens to be preferable for AC welding. Set the EP to no higher than 50% of your EN amperage, and set your balance at 75% EN. One second preflow, postflow on auto.

    As stated, MIG wire is the same specs as TIG rod, and .035" is readily available in one or two pound spools to fit spool guns.

    Just how thin of a metal, and in what configuration are you trying to weld? With any TIG welding, cleanliness is extremely important. Use new, degreased files and stainless steel wire brushes, virgin abrasive disks and polishing wheels made just for aluminum, and stored in ziplock bags. DO NOT use aluminum oxide sandpaper, ever! Same goes for sandblasting, virgin media that does not contain aluminum oxide.

    Reagent grade acetone does a better job than big box paint shop solvent, or drug store nail polish remover. Sheared edges need to be filed or sandpapered smooth and free of burrs. After degreasing, aluminum surfaces need to be chemically or mechanically cleaned within 20 minutes of welding, or an oxide coating reforms. Welding suppliers will sell pint or quart bottles of aluminum cleaning solutions.

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