Jump to content

Brian Dougherty

Members
  • Content Count

    2,673
  • Joined

  • Last visited

  • Days Won

    47

Everything posted by Brian Dougherty

  1. One of these has been on my to do list for a while for an old friend. I wouldn't have thought to punch and drift it though. That makes it look higher class. I'll go a long way for a pun, but if I were you I would forge out a quick numeral "2" out of some round bar and include that in the picture with your froe
  2. You're a true gentleman Jeremy Conner, Some day you'll see a young person struggling to get started in something, and you'll be in a position to help. When that day comes, you'll know what to do.
  3. You'll definitely get better pricing from MSC. USA made taps are surprisingly affordable.
  4. Beautiful piece! How was the patterning on the wood done? This gives a whole new meaning to "Give someone the bird"
  5. Do you ever have issues with your bandsaw blades when slicing these bars up? Do you normalize the bars before cutting? I haven't been normalizing, but it seems like I frequently run into something that suddenly dulls the blade.
  6. Buy individual pieces from McMaster to replace the worn out taps on your set. The basic HSS taps they sell are way better than any box store set I have ever seen. Probably be way less than $100 to replace the worn ones, and then just a few bucks whenever you need to replace one after that.
  7. A big enough water jet could cut it, but it will be a relatively slow cut. I would think it would be cheaper to get a machine shop to mill out the hole. There is probably a guy with a mill in his garage within a few miles of you that would help you out just because you show interest in metalworking.
  8. I wouldn't say I have a well informed opinion, but I feel it would make the tip harder to aim, and is likely to catch or at least rub on the meat as you pull through the cut. I think it looks really cool, and that may be enough reason to leave it there. However, from a purely functional point of view, it doesn't seem to add anything. In my day job (engineer) things that don't add to the function have a tendency to get in the way at some point. Then again, maybe I am using too much science and not enough art
  9. Recently I saw a folder I made for a guy earlier in the summer. He carries it every day and is very 'Proud' of the knife, but he also knows how to take care of tools. Even with that I was surprised to see some rust forming around the pivot area. It's made me think about trying some stainless for a folder. (Shudder) I have a commercial knife with an S35VN blade. It is the one production knife I have had in the last 10 years where I wasn't disappointed in the blade performance so I thought I would start looking there. I have a small heat treating oven, so I am not too worried about complex thermal schedules. However, the quench process is new to me. Here is what I copied from a supplier website about hardening: HARDENING Preheat: Heat to 1550-1600°F (845-870°C), Equalize. Austenitize: 1900-2000°F (1035-1095°C), hold time at temperature 15-30 minutes. Quench: Air or positive pressure quench (2 bar minimum) to below 125°F (50°C), or salt or interrupted oil quench to about 1000°F (540°C), then air cool to below 125°F (50°C). Temper: Double temper at 400-750°F (200-400°C). Hold for 2 hours minimum each time. A freezing treatment may be used between the first and second tempers. Freezing treatments help to attain maximum hardenability and must always be followed by at least one temper. NOTE: For optimum stress relieving, CPM S35VN may be tempered at 1000-1025°F (540-550°C). Tempering in this range may result in a slight decrease in corrosion resistance. Size Change: +0.05 to +0.10% when fully martensitic. The presence of retained austenite may reduce the net growth. When tempering at 400-750°F (200-400°C), freezing treatments may be necessary to minimize retained austenite. I take it this is an air hardening steel. Am I right in thinking that the positive pressure is to increase the air density to pull the heat out faster than it would at ambient pressure? I'm not sure how I would pull that off, but I could do the interrupted oil quench fairly easily. This stuff isn't' that expensive. Now that my curiosity is up, I'll probably end up buying a little to play with. (Shudder again)
  10. I like the look of the little peak on the spine at the tip, but suspect that feature would actually be detrimental when using the knife.
  11. Thanks Chris. The steel turned out like I wanted, but I didn't plan ahead for what the grinding of the bevels would do to the pattern. That was the first blade I made from the bar. This is the second one. (I showed it a couple of weeks ago since I finished it first) I adjusted the grind a bit to get a better pattern: @Alex Middleton - Nice stabilizing tank!
  12. Yep, cactus juice will attacks some plastics. I seem to remember that they have a warning about one plastic in particular on their website.
  13. Just putting on the finishing touches on another blade made with a bar of double twists that I forged a while back.
  14. The movie was horrible! Don't wast your time on it, read the books.
  15. What that old joke about having to clean out your forge so you can remount the rear brake drum to the family car to drive to town?
  16. I made a melting furnace lining out of refractory cement mixed with vermiculite once. That would have been easy to cast into brick shapes. I wouldn't recommend this over buying bricks, but if it's adventure you are after... This is a thing? Why didn't someone tell me this before?!?
  17. Sigh... ...the youth of today. Before you do anything else with your life, read this. It'll be available in your local or school library. https://www.amazon.com/Ultimate-Hitchhikers-Guide-Galaxy/dp/0345453743/ref=sr_1_2?crid=1ND43OWFVOOYG&keywords=hitchhikers+guide+to+the+galaxy&qid=1571429204&sprefix=hitchhikers%2Caps%2C157&sr=8-2
  18. 42 (If you don't get the joke, I'll have a book recommendation for you...)
  19. I moved my platen out about an inch to overcome this. I've been very happy with my OBM. It's been 4 or 5 years now. I'm probably going to have to replace the tacking wheel soon, but that is the only issue I've had in all this time.
  20. This one is tempting. It's expensive, but I keep thinking about what I was told years ago when I complained about how expensive my caving helmet was. Something along the lines of, "If your skull isn't worth it, then buy a cheap helmet". https://www.amazon.com/Carbon-Monoxide-Inspector-Detector-Portable/dp/B004YUEPBW/ref=sr_1_16?crid=2FYVV3YZMJHRH&keywords=co+monitor&qid=1571426532&sprefix=co+mon%2Caps%2C147&sr=8-16
  21. Cool. I think I would leave the oxidation colors in place too.
  22. Management theory classes teach that most people who no longer need to worry about ensuring they have basic needs for survival tend to be motivated by having a purpose, or contributing to something that they feel is important. I tend to be a bit more selfish than that. I am most content in my personal life when I am pushing my motley collection of skills to a new level. That may be because my real job has me making somewhat heroic efforts to solve other people's problems in short timelines. When I go home, it is "My" time.
×
×
  • Create New...