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Rob Davis

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Everything posted by Rob Davis

  1. The primary purpose of a check valve is to prevent a reversal of flow. It seems like what you want is a self actuated pressure control valve. This kind of valve should close in the event of a sudden loss of downstream pressure.
  2. Is there a preferred method to remove rust from files? I bought some files in an estate sale. A few of them are rusty. I would like to clean them up but do not want to do any damage. to them. My first thought was vinegar, but I am open to other methods.
  3. If the oil is a little warmer at quench does the steel not harden as much??
  4. I made a knife from a small file to use as a paring knife. I finished it to near mirror finish. It wasn't perfect but pretty good. I used it to cut the peel off a grape fruit and the acid seesm to have etched the blade. Is there anything I can put on the blade to protect the finish??
  5. I spoke with a man from BOGGS TOOL COMPANY today. What a cool company. I was concerned about how much it might cost to have them fix up this old file. He quoted me a price that was some number (I don't recall) of cents per inch. So it' going to cost less than $4 to sharpen up this file. What a very cool company. The man added that if they can't sharpen in to meet their standards they will only charge me 25 cents. Amazing! Now all I have to do is find a container that the file will fit in. Thanks for the recommendation!!
  6. C Craft, I touched it up with a wire brush. It appears to say DISSTON USA BITE-RT
  7. I agree. I'm going to try to clean it up and make it useful.
  8. Just a random question. How big are the biggest files?? I make my knives from old files (like most beginners). So, I have been acquiring files at garage sales and estate sales. Today I bought a file, that for me, is gigantic. With the tang it is almost 2 feet long. It's bigger than a farriers rasp. I almost feel bad about the idea of grinding or cutting it.
  9. It's not easy to find! That is true. Just found some. I want to pair it with a birdseye maple.
  10. IF I use 3 one quarter inch copper pins in a knife handle, will that be durable?? Is copper round stock strong/durable enough to use in knife making? I really do not see copper used. This is why I ask.
  11. To a trained eye a weld flaw cannot be a good thing, but that 2nd to the last pic is is beautiful! You should frame it a hang it on a wall. The colors are striking!
  12. My second knife, better than the first. Still lots of room to grow. Comments???
  13. I hooked it up using a 10 PSI regulator. The maker suggests a 30 PSI regulator (I didn't notice this when I bought the first regulator). Would a higher pressure regulator give me greater ability to dial back the pressure and therefore the intensity of the flame??
  14. Here is a link to the ETSY Page. https://www.etsy.com/listing/740555448/super-high-output-forge-burner?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=propane+burner&ref=sr_gallery-1-1&organic_search_click=1&bes=1
  15. The burner was the only part I didn't make. I did not want bet my life on my plumbing ability. It was advertised as burner for a small to medium size forge. The description does not give an orifice size. I'm attaching the link. It was made by a company called Superior Forge. This is a pic from their Etsy page. I fired it up today and it definitely gets the knife up to non magnetic heat pretty quick. The inside of my forge is 4x4x9. The flame does not hit the steel directly when I lay it down or stand it on its side under where the burner enters the side of the forge.
  16. For some reason the video of the forge operation will not upload. Not sure why. forgvid.3gp
  17. I build a forge to heat treat file knives. Seems like regardless of how I adjust the regulator there is more orange flame than I should be seeing. I think I need to go to the opening between the burner and the inside edge of the forge and seal it up with some refractory cement. I am open to other ideas, comments or opinions. I packed the back of the burner opening with high heat insulation. After I turn it off smoke is coming out of the outside opening of the burner. I think it might be that insulation cooking off but I'm not sure. Again, open to any ideas. forgvid.3gp
  18. Joshua States mentions hitting it with a disc. I do no believe I have ever seen anyone grind a knife on a disc. Do you have a video of that. I'm curious about the technique.
  19. I did try different speeds with the drill and used Cobalt bits. I used regular old 3 in 1 oil. My biggest concern was (based upon all those youtube videos) after I cooked it twice, the file never seemed to get a good bite. With a lot of pressure the file would at best scratch the steel. Sandpaper worked ( using belt sander and rotary tool) and those cheap diamond files worked, but the steel file never seemed to get any bite. So I have been assuming I did not get the steel soft enough.
  20. I did optimistically rely on the house oven thermostat. I tempered twice. One hour each time at 400 degrees. I do have a thermometer I can use on the next one. I did this tempering after I was about 90% done with the shaping.
  21. This is my first effort at knife making. Started with a file. Should have spent more (or any) time on layout but eyeballed the whole thing. Did some of the shaping with an angle grinder but most of it was done with a 8" bench grinder. Also used a rotary tool (saw) to add detail to it. I really must have messed up the tempering because even though it was light purple on the edge after the first hour at 400 degrees F, I could never get a drill (cobalt bit) to even scratch the handle. I temperd it a second time hope to get at drill through. The whole blade came out purple but the drill st
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