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Dimensions of Morse Tapers, Jacobs Tapers, and Brown + Sharpe Tapers

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


MORSE TAPERS

Morse Tapers

           LARGE      SMALL
MORSE     DIAMETER   DIAMETER
TAPER#      (A)        (B)       LENGTH
---------------------------------------
  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
---------------------------------------


BROWN + SHARPE TAPERS

           LARGE      SMALL
 B+S      DIAMETER   DIAMETER
TAPER#      (A)        (B)       LENGTH
---------------------------------------
  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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