crown block 1.Forged with high strength steel. 2.Conform to API ... induction to provide extended service life. Double tow conical roller bearing on the sheaves are designed with independent lubricating points for ... the wire rope from running out of sheaves. Each crown block conforms to API 4F & API 8C mandates. Model TC135TC225TC315TC450Max.hook ... ,700)7,400(16,300)9,500(20,940) crown block