With the SE-77 Square Edge Jig, it is easy to set your wood
chisels and plane irons for sharpening to a square corner. The design
gives you the best conditions for a successful sharpening with the
highest precision over the final result. You can also set the jig for a
slightly convex shape.
The SE-77 Square Edge Jig is a further development of the SE‑76
jig. It has been provided with an adjustable side that can be set with
the help of two smaller knobs, which allows fine tuning if needed. This
can be required if the tool is not exactly square to the stone, is very
narrow or if the steel is slightly twisted. The setting for fine
adjustment is done in seconds by loosening one of the smaller adjustment
knobs and tightening the other.
The jig's construction also makes it possible to position and
sharpen tapered chisels, e.g. Japanese chisels. The safety stops keep
the jig securely on the Universal Support and prevent the tool from
sliding off the grindstone, so there is no risk that you will hurt your
fingers when sharpening. The jig fits wood chisels and plane irons up to
77 mm (3") width.
Most types of plane irons can benefit from a slight convex
shape. The degree of camber depends on the type of plane and should be
approximately the same as the thickness of the shavings. Thanks to the
adjustable side on the SE-77 jig, you can achieve the optimal convex
shape for your tool.
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The jig comprises an upper base with a lower clamp and two
locking knobs for fixing the tool. The jig slides on the Universal
Support on nylon bushings across the grindstone. The edge angle is set
with the Micro Adjust (3) on the Universal Support (4).
There are two safety stops to prevent the tool from slipping off
the stone when grinding. One inner stop (1) to be positioned according
to the width of the tool and one outer stop (2) mounted on the end of
the Universal Support.
The jig lines up the chisel to its upper flat side, making it
easier to mount it correctly (not twisted). Conventional jigs need
The lower clamp has a ridge in the centre enabling shorter tools
with a tapered shank to be firmly mounted, e.g. Japanese chisels. The
upper base, which lines up the tool, is designed so the clamping
pressure is distributed to the ends and the tool mounts firmly without a
heavy tightening of the knobs.