You must have STEAM TUBES and FIRE HYDRANT to make STEAM CRANK. You can find this item in building category. Ever watched the grass grow (IN REAL LIFE)? It is faster than getting this tree ready for harvest. Breaking STEAM CRANK gives you 19 experinece points per tree and block you brake. Oops, there is no entry in the database about durability. If you know something, please share. Unfortunaltely seedratio information is not available. There is no data about gemratio. Currently we do not yet have knowledge about the blockratio of STEAM CRANK.