Re: Sharpening on wet & dry SiC paper
« Reply #3 on: October 04, 2020, 12:43:59 PM »
Just finished hand regrinding this older ScrapYard Wardog in INFI steel using wet & dry SiC paper, first on on glass then on rubber with WD40 oil as a lubricant.
The old convex edge measured ~40 degrees inclusive at the heel widening to ~50 degrees inclusive at the belly, while the new convex edge measures an even ~30 degrees inclusive from heel to tip.
Blade crosshatched with a red marker, which i find useful to see where exactly i'm removing steel in the beginning.
The apex has been removed by pulling the old edge a few times very lightly over a fine diamond plate.
The almost 6 mm thick INFI blade:
After hand regrinding the blade on 1/2 a sheet of 180 grit SiC to a shallower convex edge (without producing a burr), while regularly checking with the Tormek AngleMaster to make sure that the new apex would fit in the 30 degrees inclusive slot.
Time spent up to this point: 2 hours
After the first refining steep on 1/3 of a sheet of 240 grit SiC, this time creating a small and even burr (only when the grit became increasingly finer due to SiC's friable nature)
After refining the scratch pattern and the burr on 1/2 a sheet of 400 grit SiC, but now on a semi-hard rubber backing, again using WD40 as a lubricant.
The burr has already been removed on the Tormek leather wheel with 1.0 micron diamond compound to reveal a toothy edge that is reverse chesthair whittling sharp.
Overall length: 24,5 cm
Blade length: 12,2 cm
Max blade thickness (ricasso): 5,98 mm
Hardness: 58-60 HRC
Handle material: Resiprene-C rubber
Weight: 176 grams