Various embodiments of the crank shaft assembly with the insert are provided. Air for a compressor crankshaft assembly includes a crank shaft having a cavity extending into the second segment, and a distal end portion having a first segment and an outer diameter. The cavity comprises a second portion having a first portion and a second bore having a first diameter, the second diameter is smaller than the first inner diameter. The crankshaft is provided with a straight passage in the second segment, the straight passage does not intersect with the cavity. The crankshaft assembly has a first insert includes a first end and a second insert having a second end having a second diameter of the insert body has a diameter, the insert is sized such that the co-occlusion.