AzB Silver Member
More research, more answers from AZB.
It seems it's something like 7.634 TPI for the Uniloc. Some say Schmelke's is incompatible with "standard" Uniloc.
Doesn't really matter to me, I'm not planning on interchanging these pieces with anything. And if I need a replacement or spare or alternate shaft, I'll get it from Schmelke, anyway.
The good part is, even if you did switch to an after market shaft, I believe Schmelke sells the 3/8x8 tap. The inside joke is. I'm to nice to say it. But welcome to AZ.