1.strict QC system 2.CNC machining 3.fine grain grey iron (GG20, GG25), C45 steel, aluminum 4.reasonable price Locking assemblies are linkers used between shafts and pulleys, which can replace the single keys and splines. They can transmit torque through a set of tightening screws with high strength, and make the required clamping force either between the inner rings and shafts or between the ...