"RogerN" fired this volley in
m:

I've mostly looked at
the internal taper dimensions, not sure about the drive keys fitting
all.


The only thing I'm sure of without looking at prints is that most NMTB-30
toolholders will fit a QC-30 spindle. (we've got a good mix of brands,
mostly European, including ONE Chinese holder... guess which one doesn't
fit G). When they don't, it has always been (for us) because the
toolholder's flange is too thin (by about 0.050) to be gripped by the
locking collar.

LLoyd