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  1. I have a thread going in the gunsmithing...

    I have a thread going in the gunsmithing sub-forum as a friend needed some help hardening a Frizzen from a replica he was repairing. I pack hardened a test piece of A32 with Kasenit. It was not...
  2. A couple thoughts. According to the MSDS this...

    A couple thoughts. According to the MSDS this material is "stable"

    I will be using it outdoors and will be about 8 feet from the actual pour based on my equipment setup. Almost always there is a...
  3. How much diffference is there scraping a planed...

    How much diffference is there scraping a planed surface vs milled surface? I've only scraped milled surfaces as I mill my straight edges either on my BP for the smaller ones like the 8 or 18 or on a...
  4. Realizing how large and diverse the PM membership...

    Realizing how large and diverse the PM membership is, I had hoped there would be someone with a connection who would allow me to buy PEGMO from them at a reasonable cost. The material is not...
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    Oooops, the disc does get hot, indeed. The...

    Oooops, the disc does get hot, indeed. The kinetic energy has to dissipate somehow. And it does through heat from eddy currents in the disc. That is exactly how most of the modern exercise...
  6. For those not inclined to click on the link, it...

    For those not inclined to click on the link, it connects to a paper titled "Mass production of poly(ethylene glycol) monooleate-modified core-shell structured upconversion nanoparticles for...
  7. Well, before I posted here, I had checked Amazon!...

    Well, before I posted here, I had checked Amazon! [also McMaster Carr ;-) ]

    I will see if there could be a clue in the cosmetic manufacturer realm. There does not seem to be much listed in the...
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    For a cleaning agent that leaves no residue, Iso...

    For a cleaning agent that leaves no residue, Iso Propyl alcohol is commonly recommended. Virtually all petroleum-based solvents contain small amounts of heavier petroleum components and are left...
  9. Anyone know of a source for 10-20 pounds of PEGMO Polyethylene Glycol Mono Oleate?

    This common industrial ingredient of cosmetics, animal feeds and many other products would be very useful for me in my foundry for making an oil-bound sand.
    But, I have not been able to locate a...
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    One little tip not mentioned is how to tell...

    One little tip not mentioned is how to tell Visually if the blade is dull and, conversely, how to know when a few strokes of the file has removed enough metal: look for a shiner on the leading tip...
  11. I finally got to trying pack hardening with...

    I finally got to trying pack hardening with Kasenit. I used SS foil wrap (the high temp version) and put a couple 1” pieces of common A36 structural steel bar 1/8 x 1 and 1/4 x 1 in an envelope...
  12. Yes, lots of carbonaceous material like leather...

    Yes, lots of carbonaceous material like leather and bone have been used as well as charcoal (sawdust in essence) to consume oxygen and generate CO—-the carbon donor for the metal. I suspect bone...
  13. Thanks for the replies, all. For my situation...

    Thanks for the replies, all. For my situation and desired outcome, I think I will use scrap to test the Kasenit in a foil pouch idea. That seems like the simplest approach and should not cause ugly...
  14. How did that work with pack hardening? ...

    How did that work with pack hardening? Generally, I thought packs were pretty well sealed. How does the wire exit and,after checking it, how doe sit re-enter the pack?

    Denis
  15. Interesting that you should mention cyanide. ...

    Interesting that you should mention cyanide. Hydrogen cyanide will kill you quickly. Other forms not so likely if not reacted with acids or alkalais to produce hydrogen cyanide.

    Kasenit's SDS...
  16. Thanks, Scott, that makes a lot of sense. The...

    Thanks, Scott, that makes a lot of sense. The Kasenit probably, as supplied, has the carbonates often included in pack hardening recipes since it is designed to give as good a case as possible...
  17. Yes, that method as well as Kaaenit and others...

    Yes, that method as well as Kaaenit and others are well known for providing a very thin skin of high-carbon hardenable steel. I've used those methods in the past where appropriate. But, in the case...
  18. I am sure you mean well. I guess I should have...

    I am sure you mean well. I guess I should have added to my list d) watch YouTube.

    Denis
  19. Pack hardening a frizzen---asking for recommendations based on your successes

    First off, this is not a sub-forum I follow and so my inquiry may be the hundredth time the subjuect has come up. If so, my apologies. I did a search and did find a thread with Geo Wilson and...
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    Take a piece of lead and a hammer and make a good...

    Take a piece of lead and a hammer and make a good deep imprint of the thread. Find a machinist with a thread gauge and have him measure the pitch. He will tell you it is left hand acme and the...
  21. I see you are trying desperately to pick a fight...

    I see you are trying desperately to pick a fight and find fault with what I've said. But, you really should read up the thread and you will see we already covered the idea of minimizing hazard and...
  22. Well if you just call me a few more names and use...

    Well if you just call me a few more names and use the the, oh my, f-word in all caps I will be just plain crushed and your point proven beyond doubt.

    No the third video by the, I am sure, retarded...
  23. Oh, I believe you cuz you say so! I will never...

    Oh, I believe you cuz you say so! I will never have a D type extinguisher in my shop should I have occasion to machine magnesium. If she catches fire, it was fate! Nothing one could do. Oh well....
  24. I wonder why they do that? Denis

    I wonder why they do that?

    Denis
  25. Maybe they’d do it like this? Or maybe they’d...

    Maybe they’d do it like this? Or maybe they’d just let the lathe/shop burn up and save the extinguisher?

    Class D Fire - Magnesium - YouTube

    Denis
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