pulley

Pulley structure and materials
1, hook: The national standards of safety hook, by forging quality steel. Rally coefficient is three times the coefficient.
2, the pulley: cast iron pulley: lower hardness, the use of the wire rope when injury.
Cast steel pulley: high strength and toughness, but the rope wear larger, only to use the loading large equipment.
Hot-rolled steel wheels: light weight, high hardness, apply large pulley manufacturers.
3, pulley - sets: 1,metallurgical oily iron core sets of round: low cost, widely applicable small tonnage, the slow speed Pulley.
2, needle roller bearings round Core: rotational flexibility, compression durable.
3, wear-resistant composite copper sets of round-core: the 21st century and updating new products, has good wear resistance, high load Dutch, and the friction coefficient small, from the applicable burden
He can not form larger lubricating film of the occasion, widely used in many rounds of the pulley group.
4, Ball and Roller Bearings round core: the national standard bearings, two each pulley, can lift tonnage, using different specifications, standards
The bearings, apply high-speed operation, maintenance-free, but high cost.

Lifting pulley is an important tool hoisting, it is simple, easy to use, can be repeatedly changed pulley traction cables and pu