I'm intrigued to know how the machine tool taper rules work. I have a drill
whose chuck is a taper fit on the spindle. It appears to me that the spindle
is a Morse taper 1 (I may be wrong). If it is indeed this size, I assumed
that the chuck (with a female taper hole) would also be a Morse taper 1. But
the manufacturers are calling it a B12. In fact, when I told them it was a
Morse 1 it threw them until I sent a photo. So my question is, what is the
difference between a Morse taper and a B taper (in principle, I mean, not in
actual size, because I know there are several different sizes). Surely the
male and female would be the same fit, would they not?
This should help -
According to page 3, a B10 taper corresponds to the small end of a MT1, and
B12 to the large end. So it would appear that the angles are the same.