Re: Oil pump tidbit

Posted by Fish'n Jim On 2015/12/9 9:30:55

As I've mentioned before, tapering is usually done/required for centering parts along an axis.
A straight pin can also act as a shaft to attach moveable parts like a lever or act as a shear pin to limit torque. This is not the usual role of a tapered pin.
Role pins are a later invention, circa '48, and are meant to be self retaining. The spring force holds it in place. But as I mentioned, if there's movement due to wear, etc, that places the pin in a condition for fatigue of the spring steel.