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Hook Block 50 Ton - 4 Sheave Grove Hook Block - Crane Network. Mar 16, 2009 Grove 50 Ton 4 sheave hook lock up in behalf of 3/4:: (19mm) rope. Utility Crane Blocks 380 Series Hook Blocks: Options Available. G8708 Chain Hoist/Hook/Block - 5 Ton Description Unbeatable for those heavy lifting chores. McKissick 380 Series Crane / Hook Blocks - Range from 5000kg to 300 Key to McKissick Utility Crane Block Model Numbers. 22-Ton Crane) That causes excessive wear and tear on the crane hoist cables and hook block sheaves. Specifications include 7/16 in. to 1 1/4 in. wire line size, 10 in. to 20 in. sheave size and 5 ton to 80 ton capacity. 3 through 350-ton capacities; 4 to 1 design factor J-Block's dual-action hook makes it easier to load. With Shackle (4) Groove for 1-1/2 Cable (4) Groove for 1-1/4 Cable . 60 Ton McKissick Crane Block. A: _____ B hooks—average straightening load (ultimate load) is 5 times Working Load Limit. Capacity: 5 to 300 tons - Large Models Available. Clients can avail from us high quality range of crane hooks hook blocks upto 300 ton capacity that is easy to maintain and have simple operational features.