Crown block consist of crawn block frame,sheaves unite and auxiliary sheaves. Crown block conformity with API Spec 4F Specifications.Crown blockTC-30TC-50TC-90Max.hook load, kN300500900Hosting system3×44×54×5number of main sheeves455Dia od main sheeves, mm(in)475(18 3/4)610(24)762(30)Dia of drilling line, mm(in)24(15/16)24(15/16)26(1)Weight, kg2454641500Crown blockTC-135TC-170TC-225Max.hook load, ...