TAPER AND GROOVED PINS Machinery's Handbook, 31st Edition
1890
Examples: For a No. 10 taper pin 6-inches long, three drills would be used, of the sizes and for the depths shown in the accompanying diagram. For a No. 10 taper pin 3-inches long, two drills would be used because the 3-inch length falls between the second and third dots. The first or through drill will be 0.6406 inch and the second drill, 0.6719 inch for a depth of 1 1 ∕ 2 inches. Table 6. American National Standard Taper Pins ANSI/ASME B18.8.2-2000 (R2010) L R A B R .706 2 .581 4 6
Major Diameter (Large End), A
End Crown Radius, R
Range of Lengths, b L
Pin Size Number and Basic Pin Dia. a
Commercial Class
Precision Class
Other 1 ∕ 4 -1 1 ∕ 4 - 1 ∕ 2 1 1 ∕ 4 -2 1 1 ∕ 4 -2 1 1 ∕ 2 -3 1 1 ∕ 2 -3 1 3 ∕ 4 -3 2 1 ∕ 4 -4 2 3 ∕ 4 -6 3 1 ∕ 4 -6 2-4 4 3 ∕ 4 -8 5 1 ∕ 2 -8 6 1 ∕ 4 -8 2-8 2-9 3-11 4-8
Max.
Min.
Max.
Min.
Max. 0.072 0.088 0.104 0.119 0.135 0.151 0.166 0.182 0.203 0.229 0.260 0.299 0.351 0.419 0.502 0.601 0.716
Min. 0.052 0.068 0.084 0.099 0.115 0.131 0.146 0.162 0.183 0.209 0.240 0.279 0.331 0.399 0.482 0.581 0.696 0.850 1.022 1.231 1.513
Stand. Reamer Avail. c
0.0625 0.0638 0.0618 0.0635 0.0625 0.0780 0.0793 0.0773 0.0790 0.0780 0.0940 0.0953 0.0933 0.0950 0.0940 0.1090 0.1103 0.1083 0.1100 0.1090 0.1250 0.1263 0.1243 0.1260 0.1250 0.1410 0.1423 0.1403 0.1420 0.1410
… …
7 ∕ 0 6 ∕ 0 5 ∕ 0 4 ∕ 0 3 ∕ 0 2 ∕ 0
1 ∕ 4 -1 1 ∕ 4 -1 1 ∕ 4 -1
1 1 ∕ 4 , 1 1 ∕ 2
1 ∕ 2 -1 1 ∕ 4 1 ∕ 2 -1 1 ∕ 4 3 ∕ 4 -1 1 ∕ 4 3 ∕ 4 -1 1 ∕ 2 3 ∕ 4 -1 3 ∕ 4 3 ∕ 4 -2 1-2 1 ∕ 2 1 1 ∕ 4 -3 1 1 ∕ 4 -3 3 ∕ 4 1 1 ∕ 4 -4 1 ∕ 2 1 1 ∕ 4 -5 1 ∕ 4
1 1 ∕ 2 -2 1 ∕ 2
0 0.1560 0.1573 0.1553 0.1570 0.1560 1 0.1720 0.1733 0.1713 0.1730 0.1720 2 0.1930 0.1943 0.1923 0.1940 0.1930 3 0.2190 0.2203 0.2183 0.2200 0.2190 4 0.2500 0.2513 0.2493 0.2510 0.2500 5 0.2890 0.2903 0.2883 0.2900 0.2890 6 0.3410 0.3423 0.3403 0.3420 0.3410 7 0.4090 0.4103 0.4083 0.4100 0.4090 8 0.4920 0.4933 0.4913 0.4930 0.4920 9 0.5910 0.5923 0.5903 0.5920 0.5910 10 0.7060 0.7073 0.7053 0.7070 0.7060
1 1 ∕ 2 -6
11 0.8600 0.8613 0.8593 12 1.0320 1.0333 1.0313 13 1.2410 1.2423 1.2403 14 1.5230 1.5243 1.5223
… … 0.870 … … 1.042 … … 1.251 … … 1.533
… … … …
3-13 a When specifying nominal pin size in decimals, zeros preceding the decimal and in the fourth decimal place are omitted. b Lengths increase in 1 ⁄ 8 -inch steps up to 1 inch and in 1 ⁄ 4 -inch steps above 1 inch. c Standard reamers are available for pin lengths in this column. All dimensions are in inches. For nominal diameters, B, see Table 5. American National Standard Grooved Pins.— These pins have three equally spaced longitudinal grooves and an expanded diameter over the crests of the ridges formed by the material displaced when the grooves are produced. The grooves are aligned with the axes of the pins. There are seven types of grooved pins as shown in the illustration on page 1892. Standard Sizes and Lengths: The standard sizes and lengths in which grooved pins are normally available are given in Table 7.
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