Application of Heavy lifting crane hook :
Heavy lifting crane hookes the most common hook device in the crane machinery. Hook hangs on the wire rope of the lifting mechanism with the help of pulleys such parts,hook is the most widely used among the load handling device. It has such characteristics as simple manufacture and strong usability.
2.Product category of steel lifting crane hook :
Heavy lifting crane hook have single hook and double hooks according to shape of hook, five strength gradesM,P,S,T,V are classified in accordance with mechanical prperty. Forging hook and strap type hook are manufactured according to the method of manufacturing,
3.Heavy lifting crane hook :Manufacturing is simple and it is easy to operate,it is mainly used in the workplace below 80t lifting capacity. Force symmetry double hooks are adopted to larger capacity.
4.Heavy lifting crane hook: adopts high-quality low carbon killed steel or low carbon alloy steel,such as 20 high-quality low carbon steel,16Mn,20MnSi,36MnSi,which is annealed after being forged,
5.Heavy lifting crane hook :riveted through several pieces of cutting forming steel,when individual plate has flaws,the whole hook is not damaged,good safety,heavy dead weight,mainly equipped with big lifting capacity cranes or cranes lifting molten steel ladles.
One of following cases happens,and discard as useless:
1.Flaws,
2.Abrasion of dangerous fracture surface reaches 10% of full size,
3.Degree of opening adds to 15% than full size.
4.Torsional deformation exceeds 10 degree.
5.Dangerous fracture surface and hook neck have plastic deformation,
6.Lining of board hook abrades reaches 50% of full size,and should be discarded as useless,
7.Mandrel of board hook abrades reaches 50% of full size,and should be discarded as useless.
