Standard Tapers

MORSE STANDARD TAPER SHANKS

Morse Taper. Dimensions relating to Morse standard taper shanks and sockets may be found in an accompanying table. The taper for different numbers of Morse tapers is slightly different, but it is approximately ? inch per foot in most cases. The table gives the actual tapers, accurate to five decimal places. Morse taper shanks are used on a variety of tools, and exclusively on the shanks of twist drills.

Table 1: Morse Standard Taper Shanks


No. of Taper	Taper per Foot	Taper per Inch	Small End of Plug D	Diameter End of Socket A	Shank	Depth of Hole H
Length B	Depth S
0	0.62460	0.05205	0.252	0.3561
1	0.59858	0.04988	0.369	0.475
2	0.59941	0.04995	0.572	0.700	3 ?
3	0.60235	0.05019	0.778	0.938	3 ?		3
4	0.62326	0.05193	1.020	1.231	4 ?	4 ?	4 ?
5	0.63151	0.05262	1.475	1.748	6 ?	5 ?	5
6	0.62565	0.05213	2.116	2.494		8
7	0.62400	0.05200	2.750	3.270	11 ?	11

Plug Depth p	Tang or Tongue	Keyway	Keyway to End K
Thickness t	Length T	Radius R	Dia.	Width W	Length L
2	0.1562			0.235
2 ?	0.2031	?		0.343	0.218
	0.2500				0.266	?	2
	0.3125				0.328
	0.4687	?			0.484	1	3 ?
	0.6250		?		0.656	1
7	0.7500	1 ?		2	0.781	1	7
10	1.1250	1 ?		2 ?	1.156	2 ?	9