12-15-2021, 10:30 AM
Good to hear from you Subwoofer! The bottom line is this - SET testing indicates that all steel edges roll and that the hardness of the edge, at least up to HRC 62, makes some but not significant difference in the result. It is possible, however, that we were using a sledge hammer to crack an egg in the testing that was conducted by yourself, ourselves and others around the world. Even though only 150 grams of force was applied to the edge, in consideration of the thinness of the edge, 150 grams may have been too much. Perhaps a much lighter impinging force would yield test results with a greater spread between the various HRC hardness levels.
Our tests showed that stropping/steeling could return the edge to at or near it's previous sharpness readings, as well. Any butcher, a hundred years ago, could have told us that, however. To us, this simply proved that the edge had been rolled as opposed to damaged during SET testing. Yes, there is a lot of variability during the sharpness testing phase of SET testing. I guess that's just the nature of beast due to uneven rolling of the edge along the test area.
Cheers and a happy holiday to you and our customers in the UK!
Our tests showed that stropping/steeling could return the edge to at or near it's previous sharpness readings, as well. Any butcher, a hundred years ago, could have told us that, however. To us, this simply proved that the edge had been rolled as opposed to damaged during SET testing. Yes, there is a lot of variability during the sharpness testing phase of SET testing. I guess that's just the nature of beast due to uneven rolling of the edge along the test area.
Cheers and a happy holiday to you and our customers in the UK!