I need to make a couple of adapter plates for the new 56HP Yanmar to fit the CV joint to the prop shaft. The gear box flange has four M10x1.5 threaded holes on a 78mm pitch circle and the CV joint has six M10x1.5 holes on a 93mm pitch circle.
At anything other than a 15 degree offset between the two circles the holes interfere. At 15 degrees I have 3mm between the holes. I am limited to22mm in thickness so I can't drill blind holes on either side. Is 3mm between holes sufficient or is there another way to lay out the bolt circles?