# Morse taper

• posted on September 12, 2013, 3:37 pm
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 spind le is a Morse taper 1 (I may be wrong). If it is indeed this size, I assume d 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 wa s 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, n ot in actual size, because I know there are several different sizes). Surel y the male and female would be the same fit, would they not?

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• posted on September 13, 2013, 10:32 pm
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 -
http://www.jacobschuck.com/pdf/Technical-Information.pdf
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.
Steve

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• posted on September 23, 2013, 8:20 pm
On Friday, September 13, 2013 11:32:50 PM UTC+1, shazzbat wrote:

Thanks Steve