Instructions
- The Crown Blocks confirm to API Spec4F, API Spec 8A/8C;
- The crown frame is made of high strength steel shapes and plates.
- The sheaves cluster is tilted to counteract traveling block’s torque. The side plate assembly is faced with derrick man so that it is easy to pick off and suspend elevators.
- The sheave grooves are intermediate frequency quenched so the surface hardness will be improved and the service life of sheaves will be extended.
- Equipped with wooden bumper blocks and retainer net.
- The bearings and the sheaves are interchangeable with those of matching travelling block
