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Convex blade
The key to a
perfect convex edge is to grind at the same line of contact (LOC) with
the grinding wheel along all the length of the blade.
We use a laser
guide to mark the LOC across the grinding wheel.
But the more important aid is a lockable Pivot Collar placed on the knife jig (manufactured for us by special order).
Convex blades can be sharpened into the edge, or
away from the grinding wheel, edge-trailing. Use our Frontal Vertical Base for sharpening away from the wheel.
Measure the
existing edge angle with a laser protractor, if ordered to reproduce.
(Our
default is 20 degrees included for quality knives and 24 degrees for mainstream, but the customer can specify any edge angle.)
Clamp in a knife jig
matching the blade thickness.
Put the pivot collar on the knife jig in front of the jig adjustable stop, and lock the collar.
Set the
grinding angle at the low of the curve, with the pivot collar pressed against the Universal Support.
(Optional:) Mark the
LOC with a laser line.
Start at
the bolster end of the blade, positioning the blade at the point where
the laser LOC crosses the wheel edge, and follow the curve.
Repeat as
needed.
Similarly
sharpen the other side of the blade.
Use the
above technique as you move the knife through the routine of grits.
Video >>
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