I have used all sorts of morticing bits on my MiniMax Horizontal Morticing machine. Bird's Mouth, Spiral, Carbide, Solid Carbide, etc., you name it.
But none compare to the bits shown here. These are incredible, in a class by themselves! I used on hard and soft woods and only had to make a few strokes to touch up edges.
I would be very grateful for a lead to a source. Mine have worked so long and hard, I have not have had to replaced them. My work horse 1/2" model was dropped by a helper and it shattered on impact with the concrete floor.
Serious reward for help finding a source for them.
Thanks in Front