Detailed Product Description Grass Cutter CrankShaft1)Material:40Cr,20Cr etc.2)Heat Treatment:Shaft:high-frequency quenching, Connecting Rod:carburizing and quenching.3)Shaft Radial Play:0.03mm.4)surface roughness:0.4,0.85)Hardness: HRC45~506)Packing:Packed in inner box bubble separately, puted in carton, and then puted on pallet. The customer's requirement is also available.