Hello Everybody,
It's finally here, the first of three CPM-M4 knives to come. Not at all an everyday steel for a knife. I cannot over emphasize how difficult this stuff is to work with. I did 90% of the grinding before HT and still went through twice as many abrasive belts and sheets as I do grinding a 240mmx55mm AEB-L blade, on which I do 100% of the grinding after HT. Still, it was an interesting experience, and I'll know better what to expect next time around.
Simple burnt in fit using a dowel and epoxy, completely sealed at the end. I'm ashamed to say that the handle is a little out of square at the butt, and that the blade picked up a slight warp of about 1mm to the right, which I could not correct for the life of me. This blade also has a new grind that I'm experimenting with that begins back into the neck, rather than ahead of it, and has a slight right hand bias to its convexity.
For those of you who have never heard of CPM-M4 before, here's a link to a graph plotting the edge retention of multiple steels, including CPM-M4 to give you some idea about how it compares to many more commonplace cutlery steels. The graph however only shows CPM-M4 at 61 hrc, this knife being around 64hrc will perform even better, I suspect M4 at 64hrc would score between 600-625 TCC on a CATRA test.
https://i0.wp.com/knifesteelnerds.com/wp-content/uploads/2020/04/CATRA-4-27-2020-2.jpg?w=753&ssl=1
Asking $350 U.S, shipping included.
It's finally here, the first of three CPM-M4 knives to come. Not at all an everyday steel for a knife. I cannot over emphasize how difficult this stuff is to work with. I did 90% of the grinding before HT and still went through twice as many abrasive belts and sheets as I do grinding a 240mmx55mm AEB-L blade, on which I do 100% of the grinding after HT. Still, it was an interesting experience, and I'll know better what to expect next time around.
Simple burnt in fit using a dowel and epoxy, completely sealed at the end. I'm ashamed to say that the handle is a little out of square at the butt, and that the blade picked up a slight warp of about 1mm to the right, which I could not correct for the life of me. This blade also has a new grind that I'm experimenting with that begins back into the neck, rather than ahead of it, and has a slight right hand bias to its convexity.
For those of you who have never heard of CPM-M4 before, here's a link to a graph plotting the edge retention of multiple steels, including CPM-M4 to give you some idea about how it compares to many more commonplace cutlery steels. The graph however only shows CPM-M4 at 61 hrc, this knife being around 64hrc will perform even better, I suspect M4 at 64hrc would score between 600-625 TCC on a CATRA test.
https://i0.wp.com/knifesteelnerds.com/wp-content/uploads/2020/04/CATRA-4-27-2020-2.jpg?w=753&ssl=1
- Blade: 246mmx51mm CPM-M4 (64hrc) 320 grit hand finish
- Neck: 20mmx21mm
- Handle: 128mm, tapering from 23.9mmx20.8mm to 22.1mmx18.3mm, scorched oak, oiled and waxed
- POB: 50mm from handle
- Spine: 2.28mm at the neck, 1.40mm at 13cm, .88mm 1cm from the tip
- Grind: flat to convex
- Weight: 133 grams
- Relieved choil and spine
- Edge: .1mm
Asking $350 U.S, shipping included.
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