Crown Blocks

Crown Blocks
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Design Features:

▋The drilling line is reeved in parallel.
▋The crown frame is made of high strength steel shapes & plates. The lug plate for top drive is provided. It is equipped
with metal base plate, handrail, and toeboard. A ladder has an opening.
▋A deviation fast-line sheave.
▋The sheave cluster is tilted to counteract traveling block’s torque. The side plate assembly is faced with derrick man
for ease of picking off & suspending elevators.
▋The sheave grooves are intermediate frequency quenched so as to provide surface hardness and extend service life of sheaves.
▋All sheaves have double-row conical roller bearings and each bearing has individual lubricating channel.
▋The rope guard prevents the wire rope from running out of the sheave grooves.
▋Equipped with wooden bumper blocks and retainer net.
▋Equipped with a frame crane for use in repairing the sheaves cluster.
▋Equipped with sand line sheaves and auxiliary sheaves.
▋The sheaves and bearings are interchangeable with those of matching travelling block.
▋The crown blocks conform to API Spec. 8A/4F and API monogram is permitted to be used.



Model TC135TC170TC225TC315TC450TC585
Max. hook loadkN135017002250315045005850
O.D. of sheavesmm (in)915(36)1005(40)1120(44)1270(50)524(60)1524(60)
Number of sheaves566778
Dia. of wire linemm (in)29 (11/8)29 (11/8)32 (11/4)35 (13/8)38 (11/2)42 (15/8)
Overall dimension (L×W×H)mm2500×2050×19202687×2150×20463200×3347×36403295×2776×25143068×2906×35763070×3000×3600