Morse taper mount for drill chucks are called B tapers? as in the following listing:
http://en.sanouchuck.com/english/productshow.asp?id=64&type=2
The answer is.........
B Tapers[edit]
B-series tapers are a DIN standard typically used for fitting chucks on their arbors, like the older Jacobs taper series. Each taper in the B-series is effectively the small or large end of a Morse taper:
B10 = small end of MT1
B12 = large end of MT1
B16 = small end of MT2
B18 = large end of MT2
B22 = small end of MT3
B24 = Large end of MT3
The number after the B is the diameter of the large end of the taper to the nearest mm, and 'about' 1mm larger than the large end of the socket (~2mm in the case of B22 and B24) [4]
http://en.sanouchuck.com/english/productshow.asp?id=64&type=2
The answer is.........
B Tapers[edit]
B-series tapers are a DIN standard typically used for fitting chucks on their arbors, like the older Jacobs taper series. Each taper in the B-series is effectively the small or large end of a Morse taper:
B10 = small end of MT1
B12 = large end of MT1
B16 = small end of MT2
B18 = large end of MT2
B22 = small end of MT3
B24 = Large end of MT3
The number after the B is the diameter of the large end of the taper to the nearest mm, and 'about' 1mm larger than the large end of the socket (~2mm in the case of B22 and B24) [4]