05-02-2018, 11:25 AM
Thats a great video KG! Thank you very much for posting it. One note for followers of this thread; we've always seemed to work with taller knives that project above the top of the vise constraints. This allows a full 1.5" range of the roller over the test section of the knife. KG has gone to some effort to make certain that his knife blade is vertical and that is important. This compensating arrangement did result in a little less roller travel range for the knife tested. None of this affects the outcome of the test results, it just makes the test easier to perform when the edge projects above the vise (In our experience anyway. Looks like KG did just fine). What we need to do is provide a better quality vise with the SET. KG made it work and work well but shouldn't have to go to the extra effort when testing lower profile knives. We'll say one thing for certain and that is that KG doesn't require any hand-holding on new projects like this. He just dives in, identifies and works through the obstacles, and then performs the experiment perfectly. Great job KG! It's a pleasure to work with you.
We've got a little news of our own to report. We've purchased the 1/8th inch A2 steel and cut it into (12) 1.5 x 6.0" blanks. Today we are going to mill the 15° bevels on both edges of the steel and then send them off to Peters Heat Treat for heat treating. Thanks to a recommendation from Mark Reich, we have discovered Brad at Peters. He has been an invaluable source of information for us. Here's a picture of the A2 blanks:
So here is what is new with heat treating; we've decided to harden in 4 pt. steps from HRC50-62 rather than 2 pt. steps. We can always define things better once we learn what seems to matter and what doesn't. We'll be doing two sets of (4) 50 - 62 with a 15° double bevel and one set of (4) 50-62 with a single 30° bevel.
Here's what new; we're going to sharpen the edges before we send them off for heat treat. Brad says this will work just fine and the heat treat won't even affect the sharpness level much, if any (in his opinion). This is huge if it works and for obvious reasons. This will clearly allow us to test the effects (if any) of the sharpening process on the steel with regard to rolling. We'll test for rolling straight out of heat treat and then re-sharpen the edge and test for roll again. Not only will we be able to test the effects of hardness on rolling but determine if the sharpening process affects it as well.
Should be exciting.
We've got a little news of our own to report. We've purchased the 1/8th inch A2 steel and cut it into (12) 1.5 x 6.0" blanks. Today we are going to mill the 15° bevels on both edges of the steel and then send them off to Peters Heat Treat for heat treating. Thanks to a recommendation from Mark Reich, we have discovered Brad at Peters. He has been an invaluable source of information for us. Here's a picture of the A2 blanks:
So here is what is new with heat treating; we've decided to harden in 4 pt. steps from HRC50-62 rather than 2 pt. steps. We can always define things better once we learn what seems to matter and what doesn't. We'll be doing two sets of (4) 50 - 62 with a 15° double bevel and one set of (4) 50-62 with a single 30° bevel.
Here's what new; we're going to sharpen the edges before we send them off for heat treat. Brad says this will work just fine and the heat treat won't even affect the sharpness level much, if any (in his opinion). This is huge if it works and for obvious reasons. This will clearly allow us to test the effects (if any) of the sharpening process on the steel with regard to rolling. We'll test for rolling straight out of heat treat and then re-sharpen the edge and test for roll again. Not only will we be able to test the effects of hardness on rolling but determine if the sharpening process affects it as well.
Should be exciting.