By Joe Kertzman
Author R.J. Martin, whose knives are essentially the most well known and sought-after within the undefined, instructs on flat- and double-hollow-grinding knife blades. Martin been featured in BLADE® journal with expanding frequency, and here is your probability to benefit his tools for blade grinding. you will not be disenchanted.
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Extra resources for Grind a Blade the R.J. Martin Way
Wear boots, if you can, to give yourself a solid, balanced base. The author uses a 10-inch contact wheel to remove the excess steel, starting near the tip-end of the primary bevel. He works from left to right, using his left thumb to push the steel against the belt, and his right hand to steer the work so that the scribe line is kept parallel to the face of the contact wheel. It’s a simple matter of working repeatedly from the handle to the tip, pressing lightly on the belt and keeping the blade blank moving until you see the scribe line disappear.
I install a nice, new 60-grit belt on the wheel and turn the speed way down. I am using the rest to support the blade directly in this step. In the accompanying picture, the photographer, Cooper, captured a great side view of the start of the grinding pass. In tapering the tang of the blade, the author creates a trough that will run up the length of the tang. He makes sure the trough is centered, which will make things easier later. Notice how the trough is not centered. A TWO-HAND PASS Notice how the right hand is forward of the left hand at the start of the pass.
It is aggressive and free cutting, and has soft edges that will yield to the curves in the plunge area. I regrind the primary bevels first, using a light touch. I run the belt slowly to keep the heat down. I can get my hands closer to the area being ground, and I have a few more seconds to apply pressure before my thumb burns. Two good passes and the results look almost perfect. Notice what happens to the shadow as it approaches the edge of the knife in the plunge area. There is a small, uneven area that must be cleaned up.
Grind a Blade the R.J. Martin Way by Joe Kertzman