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Steel Dowel Pin
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Posted by: pankajmala

01/11/2008, 17:18:49

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I need formulas for to design a dowel Pin - ref Machinery Hand book 27 th addition, page:1670 American national Standard Ground Machined dowel Pin . Cannot get where they got the single shear load for a 1 inch 102,000 lb.






Modified by pankajmala at Fri, Jan 11, 2008, 17:19:40


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: Steel Dowel Pin
: Steel Dowel Pin -- pankajmala Post Reply Top of thread Forum
Posted by: Kelly Bramble

01/13/2008, 08:35:08

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The single Shear Strength values listed within the Machinery's book are from the American National Standard Hardened Ground Machine Dowel Pins table that are designed within ANSI/ASME B18.8.2-1995: According to the notes, prior versions of ANSI/ASME B18.8.2-1995 had listed double shear load minimum values and had specified minimum single shear strength of 130,000 psi. Moreover the notes say that one should see ANSI/ASME B18.8.2-1995, Appendix B for a description of the double shear test.

I would suggest you look at ANSI/ASME B18.8.2-1995 to verify where and how they are coming up with their calculations for determining the maximum single shear and force numbers.

Now, to calculate simple shear:

Stress = Force/Area

Stress = 130,000 psi (given in the notes)
Circle Area = 3.14157 x R^2 (Dowel Pin)

Where R = radius or .5 (for a 1" diameter pin)

Rearrange the equation.

130,000 x (3.14157 x .5^2) = 102,101.025 or 102,000 lbs







Modified by Kelly Bramble at Sun, Jan 13, 2008, 08:37:40


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