Search results

  1. T

    Pairing knife WIP

    I hope to add some more pics soon. Thanks. Sent from my iPhone using Tapatalk
  2. T

    Integral handle Boning knife.

    Very impressive work.
  3. T

    Pairing knife WIP

    I performed five hardness tests on the coupons and got the following results (45N Scale): 67.1 66.0 68.1 68.0 66.5 This averages to a 67.14 on the 45N Scale which converts to 60.5 HRC according to my phone app. It appears, therefore, that my initial hardening was successful. I'm going to...
  4. T

    Pairing knife WIP

    The next pics are of my hardness tester. This tester (craigslist again) only does a superficial hardness test. It can be set to several differnt scales, but I'll be using the 45N scale which can then be converted to the C scale using an app I have on my phone. The tester has a diamond...
  5. T

    Pairing knife WIP

    The next pic shows the HT patina left on the blanks. It doesn't look too bad and should clean up pretty easily. The next two pics shows the results of the different grit finishes (600 and 2000). I was afraid of getting too thin on the finer grit finishes, and I lost the tips on those two...
  6. T

    Pairing knife WIP

    These next pics are of me taking the knives out of the oven after they had soaked at 1850 degrees for 25 minutes. Nothing to say here except you'll notice that there is a glass cutting board that is in front of the oven. I hadn't noticed it. Long after I had taken the knives out and after...
  7. T

    Pairing knife WIP

    The first two pics show the blades and the tool wrap. Sorry for the blood. This stuff is razor sharp and doesn't work as easily as aluminum foil. I usually end up cutting a finger or two, but it's nothing serious. The tool wrap keeps oxygen away from the steel during the HT. You can see in...
  8. T

    Pairing knife WIP

    I appreciate the postive comments and feedback. My heat treatment recipe for 440c stainless steel comes from the Admiral Steel website: http://www.admiralsteel.com/reference/sstltech.html It calls for HT of 440c as follows: Initial Quench Temperature - 1850°F-1950°F max Hold for 30-45...
  9. T

    Pairing knife WIP

    To test the results of my heat treatment of these blades, I have tried to prepare three "coupons" which are cut out from the same bar stock as my four paring knives. I'll put the coupons through the same heat treatment as my knvies, and I can test the coupons for hardness. In theory, the...
  10. T

    Pairing knife WIP

    For drilling handles, I use 1-2-3 blocks (1st pic), and I start the holes with a center drill (2d pic) for accuracy. I also drill various holes around the tang with a 1/4" bit to lighten the weight of the handle, and these holes also serve as epoxy pins (3d pic). Finally, when all the holes...
  11. T

    Pairing knife WIP

    The next pic shows the four paring knives ground to various grits. The highest machine grit is 2000 shown above. The final machine grits for the other three are 240, 400, and 600. In the next pic I'm planing my handles. On top, it is a simple handle material (probably black micarta) with...
  12. T

    Pairing knife WIP

    I've completed my rough grinding with a 60 grit belt. Prior to heat treatment, I have in the past normally gone to a 400 grit belt. I use a 220 grit belt after the 60 grit belt, and then I use the 400 grit belt. I have four knives that I'm working on, and I decided to expeirment with these...
  13. T

    Pairing knife WIP

    These next pics are various shots of the blank after I've completed rough grinding on both sides. In the last pic you can see the distal taper. This is actually more of a distal taper than I'd like at this point.
  14. T

    Pairing knife WIP

    The first pic here shows the knife when I'm done rough grinding one side. I don't want a plunge line on this knife, so I've blended in the plunge line at the ricasso area. The second pic show the blank from a different angle after rough grinding only one side. You can see the initial...
  15. T

    Pairing knife WIP

    Goining back to when I cut the initial bevels, when I get to where the blade curves around toward the point, I'll drop my hand that is holding the handle end so that the contour of the cutting edge follows along the platten. However, when I start grinding the second bevel for the flat grind...
  16. T

    Pairing knife WIP

    The first pic attached here is my attempt to draw an illustration of my undertanding of what I do with respect to a flat grind As I mentioned above, I stand close to the grinder so I can look down and see how the blade is toucing the platen on my grinder. I make my initial cut for a flat...
  17. T

    Pairing knife WIP

    For any one wanting to learn how to flat grind, the dvd of Kevin Cashen's lecture on "Blade Grinding" offered by ABS is well worth the money. As I stated above, I established 0.03" lines along the center of the cutting edge of my blank. The first step I take in grinding a blade is to cut an...
  18. T

    Pairing knife WIP

    I flat grind blades using a platen attachment to my grinder. I currently grind free hand with no tool rest or jigs. In the future I would like to incoporate a tool rest and/or a jig, I just have not yet learned how to use these tools. I grind blades with the edge side up. I like to get...
  19. T

    Pairing knife WIP

    The second thing I like to do is determine the edge thickness of the cutting edge I'd like to have left after rough grinding and scribe refrence lines for this thickness. My calipers showed that the blank I'm working with was approximately 0.120" at the edge after surface grinding. In theory...
  20. T

    Pairing knife WIP

    Initial Bevels. I like to do two things before I start to grind the blade. First, I like to put a line down the center of cutting edge of the blank. This serves as reference when I'm grinding and trying to be even on both sides of the blade. The first pic here is the tool I use to scribe...
Back
Top