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David Kahn

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Everything posted by David Kahn

  1. I just signed up for this. I may be mistaken, but I think this is the first time Howard Clark has taught a class like this. So cool.
  2. Can you explain that Howard? Why does the absence of manganese result in this phenomenon?
  3. I have a question: do you ever teach classes? (Stunning work, really unbelievably nice.)
  4. Don't know if you're taking requests, but if so, I would give my eye tooth for a supply of S-2. In addition to being a good sword/knife steel, I know several non-knife maker blacksmiths (Daryl Nelson, for one) love this stuff for chisels and other tools. I've been looking for years, and nobody seems to stock or be able to order the stuff. (I'd even consider putting a pool together for a large custom order if I could find someone who could actually get the material made.)
  5. If you call them, the folks at Diehl will tell you the specs on their website are generic. I actually purchased some of the Diehl Steel material and had it tested. The results are as follows: Carbon - 1.01 % Manganese - .27 % Phosphorus - .014 % Sulfur - .007 % Silicon - .23 % Nickel - .10 % Chromium - .14 % Molybdenum - .03 % Copper - .14 % Aluminum - .03 % Vanadium - .23 % Tungsten - <.01 % I think this is, in fact, W-2, although it obviously has a bit more carbon (and some other differences) from Don's material. Fwiw, I've been using it and have generally bee
  6. The knife makers anvil is made by Chuck Robinson, and there's some info about it/him on Don's site here: http://www.dfoggknives.com/Anvil.htm . It's really nice for forging blades because you have easy access to the edge of the anvil on all sides, so when you're forging out the edge of a blade, and you need to work on the edge of the anvil, you don't have to run around to get on the other side of the horn. (If you know what I mean.) The salt pot kilns were designed by Tim Zowada: http://www.tzknives.com/saltkiln.html . They work great, and I would say that electric heat has both advan
  7. We have a little place in Lyme, right near Hanover. We can just about see Vermont from our porch! And I'd trade all the blackflies in the world for one October in New England!
  8. Thanks Dick. My wife and I hope to retire to New Hampshire one of these days, so maybe we'll be neighbors before too long. Or maybe we'll run into on another at the NESMW -- I try to get out there at least once a year for a class. (This year, I'm signed up for the wootz class with Ric in October.)
  9. Matt Whitmus Custom Machine & Fabrication LLC PO Box 1176 Ephrata, WA 98823 (509) 754-4080 mnmplusthree@hotmail.com Matt is the greatest, and his stuff is really, really nice. (Btw, thank you for the kind words; I'm very much looking forward to the day when I can have a little more shop space, and maybe add a power hammer to the mix -- got my eye on one of those Say-Maks.)
  10. If you're near Los Angeles, I'd be happy to share...
  11. I've always been very happy with Darren Ellis for refractury materials. His website is here: http://www.elliscustomknifeworks.com/. Plus, Darren is a very nice guy.
  12. Not sure about the price, because I bought mine as a package with one of his rolling mills. You can see some pictures at the end of the shop tour video I posted here: http://www.youtube.com/watch?v=HhlBoVDt2V4.
  13. It's expensive, but Matt Whitmus at Custom Machine and Fabrication in Ephrata, Washington, makes the nicest hydraulic forging press I've ever seen. It's really an impressive piece of equipment.
  14. Finally got my shop cleaned up and posted a short shop tour here: . Probably boring, amateurish, and certainly a little verbose. Still, I've got some nice tools. (Hey, you could probably carve that on my headstone one day!)
  15. Interesting. I've not seen or used this product before. I see on their website they have two units -- an "Airshield Complete" and a slightly more expensive "Airshield Pro." What's the difference between these two, other than price?
  16. Because I have a small shop, my grinders necessarily share space with the rest of my equipment. As you can all appreciate, these things produce a significant amount of metal and abrasive dust, which gets all over everything. I keep tarp covers on stuff, position a big water bucket under the grinders, run an overhead air/dust filter, and vacuum often, but still it makes a mess. To try to improve things, I purchased a portable Delta dust collector (for woodworkers) that I position by the grinder when I’m using it to take some of the grit and dust out of circulation before it gets into the air
  17. Beautiful work Wade. I really like it.
  18. Absolutely lovely. Really beautiful work. I wonder if you'd be willing to share your technique for carving/shaping the back of the blade?
  19. I've purchased both of these products several times over the past year or two from Patrick at Flying Steel (info@flyingsteel.com), most recently, last week. Nice to know there may soon be another supplier, but, at least for me, Patrick has been easy to deal with and reliable. As an aside, Parks/Heatbath's approach to selling these products is absolutely asinine, in my opinion.
  20. Along the same lines, I think I recall reading that quench speed could be increased significantly by quenching into water in an ultrasonic tank, for partly the same reason. Only, instead of the additives in the quenchant breaking up the vapor jacket, I think it's the sound waves propagating though the water in the tank that do it. Of course, as Howard suggests, pretty much the last thing I need is a faster quench. (My collection of cracked semi-finished blades is already quite impressive, and growing nicely without any additional help in that direction, thank you.) Still, I've always
  21. Serge, you have that spearpoint grind down solid. Really nice work
  22. For the last couple of years, I've mostly been working with mono steels (W-1, W-2, and O-1, mostly), but lately, I've been hankering to make up some pattern-welded stuff to use in folders, etc. I'd like to make something that will hold an edge really well, but that will show a reasonably nice pattern/contrast. Also, when I start mixing steels, I'm never entirely sure what process to follow to figure out the appropriate heat treat, so it would probably be helpful if the steels I use had at least moderately similar heat treating profiles. Any suggestions for a good combination for "using kniv
  23. Thanks for all the input guys; this is very helpful. The conversion they're offering is to a 1-to-3 phase VFD, but it's only 1.5 hp (which is what the DC unit I'm currently running is rated). Should I push to see if they can convert to a more powerful AC motor, or is it not worth the trouble? (I saw the AC motor they're using, and it's quite a bit smaller than the DC unit currently on the machine.) I was asking them if they could get me a two or a three horse power motor, and they thought it might be possible. Are there any downsides to upping the horse power?
  24. Really beautiful work. How do you mate the rough forged finish on the tang with the smooth underside of the ivory scales? (Also, where in Provence are you located? I spent a year or so living in Nimes, and also spent a couple of seasons teaching diving at the CIP in Collioure, near Perpignan.)
  25. Absolutely stunning. Maybe when I move to New England, I can take lessons!
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