04-18-2018, 09:02 AM
Mr. Blade Banter welcome to the forum. 
Thanks for posting the video with your sharpness tester. It uses the same principle as Mike’s instruments.
From physical point of view we have to measure the force necessary to cut the test medium.
I am wondering about the way how you use the Lyman trigger pull gauge. Your video shows that the pull is oriented rather horizontally and so only small part of this pull acts vertically and contributes to the cutting process.
I would recommend to orient the pull vertically, downwards. Than the reading of the pull weight can be used as a measure of edge sharpness.
Jan
Thanks for posting the video with your sharpness tester. It uses the same principle as Mike’s instruments.
From physical point of view we have to measure the force necessary to cut the test medium.
I am wondering about the way how you use the Lyman trigger pull gauge. Your video shows that the pull is oriented rather horizontally and so only small part of this pull acts vertically and contributes to the cutting process.
I would recommend to orient the pull vertically, downwards. Than the reading of the pull weight can be used as a measure of edge sharpness.
Jan