Remedial Sharpening
Posted: Fri May 07, 2021 5:59 pm
Aside from remedying the obvious issue of lack of sharpness, sometimes a knife needs a little extra work to fix a specific problem.
This particular knife's owner asked me to put a stronger edge on the blade for him, an edge pehaps more resistant to rolling when cutting rubber underhood hoses in the auto repair shop where the knife is used.
This knife also showed the very common issue present on factory blades; an uneven, inconsistent grind along the edge from heel to tip, and the right-hand bevel ground at a different angle from the left-hand bevel.
The sharpening session on this Gerber Flatiron therefore was a three-step process; first re-cut the original bevels (18°) to correct the angle discrepancies, second, polish those bevels to minimize cutting friction, third, cut and polish a new cutting bevel at 24° to make a new, stronger cutting edge.
Total project time was 26 minutes on the Edge Pro, using the original kit stones of 220, 400, 600, 1000 grits followed by the 2000 and 3000 polishing tapes.
First photo below shows the original factory bevel; sorry about the so-so photography.
Second photo (sort-of) shows the re-sharpened edge, with its new, hopefully stronger secondary 24° bevel.
Mark
This particular knife's owner asked me to put a stronger edge on the blade for him, an edge pehaps more resistant to rolling when cutting rubber underhood hoses in the auto repair shop where the knife is used.
This knife also showed the very common issue present on factory blades; an uneven, inconsistent grind along the edge from heel to tip, and the right-hand bevel ground at a different angle from the left-hand bevel.
The sharpening session on this Gerber Flatiron therefore was a three-step process; first re-cut the original bevels (18°) to correct the angle discrepancies, second, polish those bevels to minimize cutting friction, third, cut and polish a new cutting bevel at 24° to make a new, stronger cutting edge.
Total project time was 26 minutes on the Edge Pro, using the original kit stones of 220, 400, 600, 1000 grits followed by the 2000 and 3000 polishing tapes.
First photo below shows the original factory bevel; sorry about the so-so photography.
Second photo (sort-of) shows the re-sharpened edge, with its new, hopefully stronger secondary 24° bevel.
Mark