A Jig for 40/40 Grind Peter Miao
The 40/40 grind refers to the signature gouge of Stuart Batty. The wings are swept back at 40 degree to the center line, and the bevel angle is 40 degree all around. If you look at the gouge from the side, it should have a 78 82 degree angle, combining the two 40 degree angles. This is a very versatile gouge in his system.