Crank

A crank is an arm attached at a right angle to a rotating shaft by which circular motion is imparted to or received from the shaft. When combined with a connecting rod, it can be used to convert circular motion into reciprocating motion, or vice versa The design contains two assemblies, one of the piston and another of the whole assembly. I have included the measurements as well as an exploded view with the design of the parts.I hope this helps someone out there.