Welding Sheaves for Crown Block TC450

The crown block consists of crown basement, fast-line sheave, dead-line sheave, main sheave, sand-line sheave, drilling line protector and sheaves for hydraulic and air winch, bumper wood for the Crown-O-Matic and guardrail. It’s designed with closed type and open type. The traveling system is divided into 7×6, 6×5, 5×4, and 4×3, which fit to Φ7/8″~Φ1 1/2″ drilling lines. The sheave groove conforms to the requirements of API RP 9B. The sheave groove surface is processed with a quenching treatment. The bearing adopts centralized lubrication for convenient operation. The crown block complies with API 4F standard The rope ward-off structure can prevent the rope from failing off. The crane boom is for the repairing of the sheaves Equipped with sand line sheaves and auxiliary sheaves The pulley can exchange with the other matching travelling block