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476 SHOP NOTES
TABLE No. 89—Tapers per Foot and Corresponding Angles
Taper Included Angle with Taper Inc.uaea Aiig.e wuh
Per Ft. Angle. Center Line Prr Ft. Ansrle. Center Line.
i" o° 3
6’ 0°l8’ I" 4° 46’ 2° 23’
1
4 I 12 O 36 li 7 09 3 35
T°6 i 30 45 If 8 20 4 10
1 i 47 54 2 9 3i 4 46
16 2 05 1 02 2* 11 54 5 57
i 2 23 1 12 3 14 15 7 08
i 3 35 1 47 3i 16 36 8 18
1 5
Tfi 4 28 2 14 4 18 55 9 28
Morse Taper.
The Morse Taper, which is so universally used for the
shanks of drills and other tools, is given in
TABLE No. 90.—Horse Taper.
No. of
Taper.
Standard P’
1
^** *
Hug Depth.
J^ Diameter of
Plug at
Small End.
Taper per
Foot.
1
2
3
4
5
6
2y
8 inch.
Z T6
8* "
75i
"
0.475 inch.
0.7
0.938 "
1.231 "
1.748 "
2.494 "
0.369 inch.
0.572 "
0.778 "
1.02
1.475 "
2.116 "
0.600 inch.
0.602 «
0.602 "
0.623 "
0.630 "
0.626 w
For very complete information regarding the Morse Taper,
see American Machinist, May 14, 1896.
No. I
2
3
4
5
6
Socket holds % inch to \% inch inclusive
" h " " it
"
3 2 ^
„ „?2 ., ..3 „
016 4
Jarno Taper.
In the " Jarno Taper " the number of the taper gives the
length of the standard plug in half-inches, and it gives the diame-
ter of the small end in tenths of inches and the diameter of the
large end in eighths of inches. For instance, a No. 8 "Jarno
Taper " is four inches long, one inch diameter at large end, and
0.8 inch diameter at small end. The taper, of course, is 0.6
inch per foot for all numbers. This is a very convenient sys-
tem, and deserves adoption for its merits. The same taper is
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