MORSE TAPER DIMENSIONS
 
Here is a table with details of dimensions for all parts of both male and female Morse Tapers, sizes 0 to 7 inclusive. All dimensions are in Inches.
(b) = Both : (F) = Female : (M) = Male
 
Drift/Key/Taper number   (B) 0 1 2 3 4 5 6 7
Plug at Small End          (M) 0·252 0·369 0·572 0·778 1·020 1·475 2·116 2·750
Diameter at Socket End  (F) 0·356 0·475 0·700 0·938 1·231 1·748 2·494 3·270
Standard Plug Length     (M) 2·000 2·125 2·563 3·187 4·062 5·187 7·250 10·000
Whole Shank Length      (M) 2·344 2·563 3·125 3·875 4·875 6·125 8·563 11·625
Depth of Hole                 (F) 2·031 2·187 2·6250 3·250 4·125 7·25 7·375 10·125
Socket End to Keyway   (F) 1·938 2·062 2·500 3·062 3·875 4·938 7·000 9·500
Length of Keyway           (F) 0·563 0·750 0·875 1·187 1·250 1·500 1·750 2·625
Width of Keyway            (F) 0·160 0·213 0·260 0·322 0·478 0·635 0·760 1·135
Length of Tongue           (M) 0·250 0·375 0·437 0·563 0·625 0·750 1·125 1·750
Diameter of Tongue        (M) 0·235 0·343 0·531 0·719 0·968 1·406 2·000 2·625
Thickness of Tongue      (M) 0·157 0·187 0·250 0·313 0·469 0·625 0·750 1·125
Mill radius for tongue      (M) 0·156 0·187 0·250 0·281 0·313 0·375 0·500 0·750
Radius of Tongue           (M) 0·040 0·050 0·060 0·080 0·100 0·120 0·150 0·180
Shank Depth                 (F) 2·219 2·438 2·937 3·687 4·625 5·875 8·250 11·250
Taper per Foot               (B) 0·6216 0·5986 0·5994 0·6024 0·6233 0·6315 0·6257 0·6240
Taper per Inch                (B) 0·0521 0·0499 0·0500 0·0502 0·0519 0·0526 0·0521 0·0520