How to tell what MT tailstock taper is?

If you had a largish lathe (18"x72") but didnt know the MT # of the tailstock, how would you go about figuring out what it is? I need to get a new live center, want to get the right MT.

Thanks for any info.

Reply to
Greg Deputy
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Table on page 906 of Machinery Handbook has the specs. If you don't have this, give us the diameter at the small end of the taper, diameter at large end, and distance between the two diameters.

Karl

Reply to
Karl Townsend

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Hey Greg,

Scott Logan has some good stuff at

and in particular

or closer at

The following is an excerpt from that last site

Taper Name Large Taper/ Taper/ Angle Small Length End Foot Inch From End Center

----------------------------------------------------------------------- #0 Morse 0.3561 .6246 .0521 1.4908 0.2520 2.00 #1 Morse 0.4750 .5986 .0499 1.4287 0.3690 2.13 #2 Morse 0.7000 .5994 .0500 1.4307 0.5720 2.56 #3 Morse 0.9380 .6024 .0502 1.4377 0.7780 3.19 #4 Morse 1.2310 .6233 .0519 1.4876 1.0200 4.06 #4-1/2 Morse 1.5000 .6240 .0520 1.4894 1.2660 4.50 #5 Morse 1.7480 .6315 .0526 1.5073 1.4750 5.19 #6 Morse 2.4940 .6257 .0521 1.4933 2.1160 7.25 #7 Morse 3.2700 .6240 .0520 1.4894 2.7500 10.00

-----------------------------------------------------------------------

I would measure just the diameter of the visible opening of the tailstock quill, and pick the closest one form the column "Large End".

18" lathe is at least a MT-4, and probably an MT-5

Take care.

Brian Lawson, Bothwell, Ontario.

Reply to
Brian Lawson

Reply to
Steve Lusardi

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