Hmmm..got to looking...have a couple cutters, still with the original Stanley factory grind....because I haven't needed them....and, other than cleaning off rust...
Stanley 45 Cutters, same bevels.JPG
Used my bevel angle checker ( from Veritas, no less)
Stanley 45 Cutters, bevel checker.JPG
Slide a blade in, whichever degree setting fits best..
Stanley 45 Cutters, 30 degrees.JPG
Says 30 degrees. Factory grind.
Stanley 45 Cutters, #17 bevel.JPG
Sides angle just a slight bit, to provide clearance....When I place both bits side by side so one edge is touching...other faces have a paper thin gap between the two cutters..
As for setting up to do a groove...
Stanley 45 Cutters, #14 set up.JPG
A #14 cutter..after ploughing 4 grooves at 3/8" depth....and hitting a few knots along the way....usually after I've got a good start and just getting halfway to depth...usual...
The #17 and the #24 haven't been used....yet. Been using a #12 a lot....same bevel set ups. No, the bead cutter does not have any "back bevel" and likely will never need one.