Table 1. American National Standard Hardened Ground Machine Dowel Pins ANSI/ASME B18.8.2-2000 (R2010)
L
L e
4°– 16°
C
A
B
R
Pin Diameter, A
Single Shear Load, for Carbon or Alloy Steel, Calculated, lb
Crown Radius, R
Point Diameter, B
Crown Height, C
Suggested Hole Diameter c
Range of Preferred Lengths, b L
Nominal Size a or Nominal Pin Diameter
Standard Series Pins
Oversize Series Pins
Basic
Max.
Min.
Basic
Max.
Min.
Max. 0.058 0.074 0.089 0.120 0.150 0.180 0.240 0.302 0.365 0.424 0.486 0.611 0.735 0.860 0.980
Min. 0.048 0.064 0.079 0.110 0.140 0.170 0.230 0.290 0.350 0.409 0.471 0.595 0.715 0.840 0.960
Max. 0.020 0.026 0.031 0.041 0.052 0.062 0.083 0.104 0.125 0.146 0.167 0.208 0.250 0.293 0.333
Min. 0.008 0.010 0.012 0.016 0.020 0.023 0.031 0.039 0.047 0.055 0.063 0.078 0.094 0.109 0.125
Max.
Min.
1 ∕ 16 0.0625 0.0627 0.0628 0.0626 0.0635 0.0636 0.0634 0.0781 0.0783 0.0784 0.0782 0.0791 0.0792 0.0790 3 ∕ 32 0.0938 0.0940 0.0941 0.0939 0.0948 0.0949 0.0947 1 ∕ 8 0.1250 0.1252 0.1253 0.1251 0.1260 0.1261 0.1259 5 ∕ 64 d
3 ∕ 16 - 3 ∕ 4
400 620 900
0.0625 0.0781 0.0937 0.1250 0.1562 0.1875 0.2500 0.3125 0.3750 0.4375 0.5000 0.6250 0.7500 0.8750 1.0000
0.0620 0.0776 0.0932 0.1245 0.1557 0.1870 0.2495 0.3120 0.3745 0.4370 0.4995 0.6245 0.7495 0.8745 0.9995
…
5 ∕ 16 -1 3 ∕ 8 -2
1,600 2,500 3,600 6,400 10,000 14,350 19,550 25,500 39,900 57,000 78,000 102,000
0.1562 0.1564 0.1565 0.1563 0.1572 0.1573 0.1571 0.1875 0.1877 0.1878 0.1876 0.1885 0.1886 0.1884
…
5 ∕ 32 d
1 ∕ 2 -2
3 ∕ 16
1 ∕ 4 0.2500 0.2502 0.2503 0.2501 0.2510 0.2511 0.2509 5 ∕ 16 0.3125 0.3127 0.3128 0.3126 0.3135 0.3136 0.3134 3 ∕ 8 0.3750 0.3752 0.3753 0.3751 0.3760 0.3761 0.3759 7 ∕ 16 0.4375 0.4377 0.4378 0.4376 0.4385 0.4386 0.4384 1 ∕ 2 0.5000 0.5002 0.5003 0.5001 0.5010 0.5011 0.5009 5 ∕ 8 0.6250 0.6252 0.6253 0.6251 0.6260 0.6261 0.6259 3 ∕ 4 0.7500 0.7502 0.7503 0.7501 0.7510 0.7511 0.7509 7 ∕ 8 0.8750 0.8752 0.8753 0.8751 0.8760 0.8761 0.8759 1.0000 1.0002 1.0003 1.0001 1.0010 1.0011 1.0009
1 ∕ 2 -2 1 ∕ 2 1 ∕ 2 -2 1 ∕ 2
1 ∕ 2 -3 7 ∕ 8 -3
3 ∕ 4 , 1-4 1 1 ∕ 4 -5 1 1 ∕ 2 -6 2, 2 1 ∕ 2 -6
1
2, 2 1 ∕ 2 -5, 6
a Where specifying nominal size as basic diameter, zeros preceding decimal and in the fourth decimal place are omitted. b Lengths increase in 1 ⁄ 16 -inch steps up to 3 ⁄ 8 inch, in 1 ⁄ 8 -inch steps from 3 ⁄ 8 inch to 1 inch, in 1 ⁄ 4 -inch steps from 1 inch to 2 1 ⁄ 2 inches. Tolerance on length is ±0.010 inch. c These hole sizes have been commonly used for press fitting Standard Series machine dowel pins into materials such as mild steels and cast iron. In soft materials such as aluminum or zinc die castings, hole size limits are usually decreased by 0.0005 inch to increase the press fit. d Nonpreferred sizes, not recommended for use in new designs. All dimensions are in inches. 2 inches, and in 1 ⁄ 2 -inch steps above 2 1 ⁄
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