Pin Connection

[drawyennik]

We are using a pin connection on a hitch for towing equipment. I am wondering if i can use the equations for bolt design?

 

[desertfox]

Hi drawyennik

I am not sure which equations for bolt design you are referring to however you need to check for shearing of pin (double shear), bearing and crushing stress on the pin recepticle and pin.

 

[drawyennik]

Sorry here are the equations.

F(shear) = 0.5Sy * A(shear)
F(bearing) = 1.2Su * A(bearing)
F(tensile) = 0.6Sy * A(tensile)

What do you mean crushing stress?

 

[desertfox]

Hi drawyennik

sorry crushing I guess means the same as bearing I should of added bending of the pin.
Those are allowable stresses not bolt equations but they look reasonable to me

desertfox

 

[drawyennik]

Thanks for the help DesertFox

 

[desertfox]

your welcome

desertfox

 

[unclesyd]

You have got to watch the bending of your pin as any amount gets one into real trouble real quick. I like to keep the total clearance between the bar and receiver to less than 1/4 of the pin diameter if possible to keep the pin in shear. Keep everything a tight as practical. I also like to to use a dry film lubricant in hole on the bar.

 

[chicopee]

In addition to bending, I would also put a washer between cotter pin and adjacent eyelet; my preference to keep cotter pin from excessive wear while rubbing.