Dimensions of Standard Tapers

 

All dimensions in the following tables are in inches. We have left out the " indicator to ease reading.

Morse Tapers

   Jacobs Brown & Sharpe Jarno Top
Taper Large End Small End Length Taper/
Foot		 Taper/
Inch		 Angle
From Center
#0 0.3561 0.2520 2.00 0.6246 0.0521 1.4908
#1 0.4750 0.3690 2.13 0.5986 0.0499 1.4287
#2 0.7000 0.5720 2.56 0.5994 0.0500 1.4307
#3 0.9380 0.7780 3.19 0.6024 0.0502 1.4377
#4 1.2310 1.0200 4.06 0.6233 0.0519 1.4876
#4-1/2 1.5000 1.2660 4.50 0.6240 0.0520 1.4894
#5 1.7480 1.4750 5.19 0.6315 0.0526 1.5073
#6 2.4940 2.1160 7.25 0.6257 0.0521 1.4933
#7 3.2700 2.7500 10.00 0.6240 0.0520 1.4894

Jacobs Tapers

     Jacobs Brown & Sharpe Jarno Top
Taper Large End Small End Length Taper/
Foot		 Taper/
Inch		 Angle
From Center
#0 0.2500 0.2284 0.44 0.5915 0.0493 1.4117
#1 0.3840 0.3334 0.66 0.9251 0.0771 2.2074
#2 0.5590 0.4876 0.88 0.9786 0.0816 2.3350
#2 Short 0.5488 0.4876 0.75 0.9786 0.0816 2.3350
#3 0.8110 0.7461 1.22 0.6390 0.0532 1.5251
#4 1.1240 1.0372 1.66 0.6289 0.0524 1.5009
#5 1.4130 1.3161 1.88 0.6201 0.0517 1.4801
#6 0.6760 0.6241 1.00 0.6229 0.0519 1.4868
#33 0.6240 0.5605 1.00 0.7619 0.0635 1.8184

Brown & Sharpe Tapers

     Jacobs Brown & Sharpe Jarno Top
Taper Large End Small End Length Taper/
Foot		 Taper/
Inch		 Angle
From Center
#1 0.2392 0.2000 0.94 0.5020 0.0418 1.1983
#2 0.2997 0.2500 1.19 0.5020 0.0418 1.1983
#3 0.3753 0.3125 1.50 0.5020 0.0418 1.1983
#4 0.4207 0.3500 1.69 0.5024 0.0419 1.1992
#5 0.5388 0.4500 2.13 0.5016 0.0418 1.1973
#6 0.5996 0.5000 2.38 0.5033 0.0419 1.2013
#7 0.7201 0.6000 2.88 0.5015 0.0418 1.1970
#8 0.8987 0.7500 3.56 0.5010 0.0418 1.1959
#9 1.0775 0.9001 4.25 0.5009 0.0417 1.1955
#10 1.2597 1.0447 5.00 0.5161 0.0430 1.2320
#11 1.4978 1.2500 5.94 0.5010 0.0418 1.1959
#12 1.7968 1.5001 7.13 0.4997 0.0416 1.1928
#13 2.0731 1.7501 7.75 0.5002 0.0417 1.1940
#14 2.3438 2.0000 8.25 0.5000 0.0417 1.1935
#15 2.6146 2.2500 8.75 0.5000 0.0417 1.1935
#16 2.8854 2.5000 9.25 0.5000 0.0417 1.1935
#17 3.1563 2.7500 9.75 0.5000 0.0417 1.1935
#18 3.4271 3.0000 10.25 0.5000 0.0417 1.1935

 

Jarno Tapers

     Jacobs  Brown & Sharpe  Jarno  Top
Taper Large End Small End Length Taper/
Foot		 Taper/
Inch		 Angle
From Center
#2 0.2500 0.2000 1.00 0.6000 0.0500 1.4321
#3 0.3750 0.3000 1.50 0.6000 0.0500 1.4321
#4 0.5000 0.4000 2.00 0.6000 0.0500 1.4321
#5 0.6250 0.5000 2.50 0.6000 0.0500 1.4321
#6 0.7500 0.6000 3.00 0.6000 0.0500 1.4321
#7 0.8750 0.7000 3.50 0.6000 0.0500 1.4321
#8 1.0000 0.8000 4.00 0.6000 0.0500 1.4321
#9 1.1250 0.9000 4.50 0.6000 0.0500 1.4321
#10 1.2500 1.0000 5.00 0.6000 0.0500 1.4321
#11 1.3750 1.1000 5.50 0.6000 0.0500 1.4321
#12 1.5000 1.2000 6.00 0.6000 0.0500 1.4321
#13 1.6250 1.3000 6.50 0.6000 0.0500 1.4321
#14 1.7500 1.4000 7.00 0.6000 0.0500 1.4321
#15 1.8750 1.5000 7.50 0.6000 0.0500 1.4321
#16 2.0000 1.6000 8.00 0.6000 0.0500 1.4321
#17 2.1250 1.7000 8.50 0.6000 0.0500 1.4321
#18 2.2500 1.8000 9.00 0.6000 0.0500 1.4321
#19 2.3750 1.9000 9.50 0.6000 0.0500 1.4321
#20 2.5000 2.0000 10.00 0.6000 0.0500 1.4321