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.
Sharpening a convex shape
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.