Thanks to the jig's shoulder (A), it is easy to mount the tool correctly at 90°.

The jig lines up the tool to its upper and flat side. The more you loosen the adjustment knobs A and B, the greater the pendulum motion you get, which increases the convexity. When sharpening a convex shape, center the tool under the jig's center line mark. Thanks to the adjustable side on the SE-77 jig, you can achieve the optimal convex shape for your tool. The degree of camber depends on the type of plane and should be approximately the same as the thickness of the shavings. Most types of plane irons can benefit from a slight convex shape. The jig fits wood chisels and plane irons up to 77 mm (3') width. 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's construction also makes it possible to position and sharpen tapered chisels, e.g. The setting for fine adjustment is done in seconds by loosening one of the smaller adjustment knobs and tightening the other.

This can be required if the tool is not exactly square to the stone, is very narrow or if the steel is slightly twisted. 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. The SE-77 Square Edge Jig is a further development of the SE-76 jig. You can also set the jig for a slightly convex shape. The design gives you the best conditions for a successful sharpening with the highest precision over the final result. Thanks to the adjustable side on the SE-77 jig, you can achieve the optimal convex shape for your tool.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 SE-77 Square Edge Jig is a further development of the SE‑76 jig.

Tormek square edge jig