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Brian Dougherty

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Everything posted by Brian Dougherty

  1. sounds like a good excuse to make a few folding knives
  2. Is this a gas or electric power unit? If it is electric, then a simple rule of thumb is 1kw of electrical power in for every HP of mechanical power generated. 50kw/240V = 208Amps, so I don't think you are likely to be able to run that in a residential environment. Admittedly, that rule of thumb is a bit pessimistic for larger motors, but what it doesn't cover is the inrush current. A motor that size may pull 10x it's rated current when starting starting under full load, and will do so long enough to blow breakers. If you have the power system to run it, then that is great. As has been pointed out, repair costs may be high enough to effectively make it a disposable unit. As for machines, I would be building a hydraulic twisting machine if I had room to put one.
  3. I Forgot to say that I'm happy you are going to try folders this year!
  4. I have the means to get some water cooled radius platens made. It would be expensive, but not terribly difficult to have the parts machined and heat treated. I'm not interested in doing this for money, but if there isn't a commercial option out there, and people want to talk about getting a batch made, we could work through what it would actually cost. I have less than zero interest in doing this if someone else already sells them, but that doesn't seem to be the case.
  5. I've been using 1075 for my springs. I quench just like I do the blade, then temper the spring to 530F (276c). The spring usually gets tempered with the blade each cycle, and then one extra cycle at the higher temp, but I just do this for convenience and have no idea waht it does to the metallurgy. I've been using smaller pins than that, but I think it depends on the scale of the knife. Lately I have been using 1/16" (~1.5mm) pins to hold the scales on and the spring in place. I like using 1/8" (~3mm) pins for the pivot. My blades have been between 2.5" and 3". I literally use a 1.5oz hammer to peen the pins. Lots of light taps. I try to get the holes tighter than 0.1mm. Depending on the pin stock you are using, you may be able to get away with the exact drill size. Alternately, I use some 0.001" over-sized reamers.
  6. I prefer 256K. Feels warmer that way...
  7. That's an oldie! Unfortunately, based on the plate I suspect it is 440v only.
  8. Many motors can be wired up for both 220v and 440v 3-phase. Can you post a pic of the data plate on the motor? Alternately, take off the cover int he connection box, and see if there is a label inside that show a low and high voltage connection diagram.
  9. Yep. I'm going to have to steal that tool design.
  10. Looking good Gary. It's funny. Your shop pics have a whole new meaning for me now that I can visualize where everything is outside the frame of pic.
  11. I like the idea of being referred to as a old man with a big beard and pointy hat! The reality is actually quite boring.
  12. I can't really divulge in public. It turns out there is a significant difference in magnetic properties of 99.9% Fe when compared to 99.8%.
  13. We needed a piece of high purity iron for a project at work. Had to pay $400 for this piece 1/2" in diameter and 3" long. It's 99.95% iron which is important for the work we are doing. I had to get it off my desk quickly because I kept looking at it thinking about how much fun it would be to try to forge it into something
  14. What Alan said. With VFDs so easily available now, the static 3-phase converters are obsolete. One of the problems with a static converter is that you can't run the motor at it's full load rating. Your 3hp motor would probably only develop 2hp with one. However, with a VFD that will cost about the same amount, you not only get full power, but you get adjustable speed.
  15. I'm in the same boat Josh is. I've come back and stared at this 3 times now. It was only this morning that I even noticed the engraving on the blade. Nicely done Sir!
  16. You're getting good at that Jeremy. That one looks perfectly symmetrical.
  17. A little bit of scrubbing this morning with an old extra tooth brush that was in my dop kit, and the blade is mostly descaled. The burns are trivial. I knew I had grabbed something hot, but didn't think much about it. I was surprised when I got my hands clean at the end of the day so I took a pic just for bragging rights
  18. Just chillin' in the hotel room after two great days with Gary. This was well worth the trip out here, and Gary had done a great job planning out the two days. I've done a fair amount of pattern welding, and even some mosaic work, but Gary managed to squeeze a lot more knowledge into the old noggin.
  19. I have spent two great days with Gary Mulkey learning a lot about making mosaic damascus. (The class was fantastic, but I'll post more about that when I finish my knife) I decided to stay one more night in the hotel before I start the trek back to Indiana. Aside from binge watching Time Team, and the Witcher, what is a bladesmith supposed to do in a hotel room for the night? I realized there is a Home Depot 10 minutes away, so I went and got a pan and some cleaning vinegar Gary had us do all of the welding dry, so there is none of that crusty black flux slag on here. Hopefully by morning my blade will be scale free. That's a 14" drywall mud pan. I'll have to keep it for this use once I get home. Here is a fuzzy shot I took before plunking it in the vinegar. The other guy in the class did a much better job than I did forging his blade to shape. He was actually able to get his ground and ready for heat treating before the day was through. He is a young guy named Michael Phillips. Keep an eye out for him as he has talent. Got some cool battle scars to take home too. I was so engrossed in what I was doing, I forgot how hot the rebar handle on my billet was getting. Live and learn!
  20. That is a fun bit of inletting you'll have to do where the wood meat the guard. Should look pretty sharp. You mention pins. Is that how you are joining the two 416 bits together? I'm leaving town in a couple of hours to head towards Branson. See you tomorrow!
  21. Does anyone make and sell the radiused platens anymore? All the ones I have heard about came from Nathan the Machinist, but it doesn't look like he still makes them.
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