01-17-2020, 10:16 AM
You'll know it if you dent an edge Brian when using our instrument and I understand that your observation, with regard to denting. is likely not based on use of our instrument. When using our instrument, the dented reading won't be 50 but 150 or 350 depending on the depth of dent. Having said that, we've never witnessed a dented edge when measuring DE razor blades and we've measured plenty of all ilk, brand and description. The almost exclusive instance of dented edges we are aware of come from some of those who sharpen straight edge razors but there has been the rare occurrence of a knife(s) exhibiting this problem as well . A foil edge might not sever test media without denting - a structurally sound and even sharper edge will always sever the test media without denting. Microtomes measuring in the 10 range are tested everyday without denting so it's all about proper edge formation.
We've tested plenty of surgical tools that dent as well but these were made of 301 or 304 stainless so were not hardenable.
To me, a dented edge is like sending a warning flare up to the sharpener - If a hardened steel edge dents while cutting a .009" polymer test media using only 50 grams of force (more or less) - it's time to review the grinding/deburring process being utilized.
We've tested plenty of surgical tools that dent as well but these were made of 301 or 304 stainless so were not hardenable.
To me, a dented edge is like sending a warning flare up to the sharpener - If a hardened steel edge dents while cutting a .009" polymer test media using only 50 grams of force (more or less) - it's time to review the grinding/deburring process being utilized.