I once bought from a UK site a MT0 live centre which was a little too long. I was trying to figure out how much to cut from the smaller end so that it fits into the tailstock properly. I went with the recommended amount. It seems to seat well but there is some wobbling at the live centre end. Don't know if its because of the taper or the live centre not being spot on.
Arnold, sorry for hijacking your thread.
Regards,
Wong
I've got a very strange answer- you bought a Number 1 Morse Taper!
This may be difficult to understand at first but I did really answer it earlier when I said-- 0.250" in 10".
The taper was the same for ALL the Morse Tapers but because we are a stupid lot and can't measure, there are now slight discrepancies between the various sizes.
Sorry Arnold for also hi-jacking your thread but this problem is fundamental stuff.