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Jacobs Tapers are used almost exclusively for Drill Chuck Mounting.
Morse Tapers are found in a wide variey of tooling: drill bits, reamers, end mill holders, drill chuck arbors, collets, lathe centers, etc.
Brown and Sharpe tapers are found on similar tooling, but mainly on older tools and machines.
JACOBS TAPERS
JACOBS LARGE SMALL
TAPER# DIAMETER DIAMETER LENGTH
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0 .25000" .22844 .43750
1 .38400 .33341 .65625
2 .55900 .48764 .87500
2 short .54880 .48764 .75000
3 .81100 .74610 1.21875
4 1.12400 1.03720 1.65625
5 1.41300 1.31611 1.87500
6 .67600 .62409 1.00000
33 .62401 .56051 1.00000
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MORSE TAPERS
LARGE SMALL
MORSE DIAMETER DIAMETER
TAPER# (A) (B) LENGTH
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0 .35610" .25200 1-15/16
1 .47500 .36900 2-1/16
2 .70000 .57200 2-1/2
3 .93800 .77800 3-1/16
4 1.23100 1.02000 3-7/8
4-1/2 1.50000 1.26600 4-5/16
5 1.74800 1.47500 4-15/16
6 2.49400 2.11600 7
7 3.27000 2.75000 9-1/2
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BROWN + SHARPE TAPERS
LARGE SMALL
B+S DIAMETER DIAMETER
TAPER# (A) (B) LENGTH
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1 .23922" .20000 15/16
2 .29968 .25000 1-3/16
3 .37525 .31250 1-1/2
4 .40233 .35000 1-1/4
5 .52315 .45000 1-3/4
6 .59961 .50000 2-3/8
7 .72537 .60000 3
8 .89873 .75000 3-9/16
9 1.06705 .90010 4
10 1.28927 1.04465 5-11/16
11 1.53176 1.24995 6-3/4
12 1.79681 1.50010 7-1/8
13 2.07310 1.75005 7-3/4
14 2.34375 2.00000 8-1/4
15 2.61458 2.25000 8-3/4
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