Special Hooks

Special hooks are models designed for a highly specialized task at industrial facilities or warehouse complexes. For example, lifting certain loads uses the choker hitch slinging method, for which load-bearing hooks of a special design are used.

Special models may be used in foundry crane spreader beams, as well as in magnetic lifter locking mechanisms and other special mechanisms.

Weight and dimensional parameters

The weight and dimensions of products intended for work under similar conditions vary according to DIN and GOST. Special hooks may be manufactured to a custom drawing, provided the mechanism meets the required strength and load level.

Material

For manufacturing special hooks, DIN permits the use of steels alloyed with chromium, nickel, or molybdenum. E355 grade steel is used for mechanisms under heavy loading. High-strength mechanisms are manufactured for jib cranes.

Weight minimization is achieved through the shape of the hook’s shank collar. According to GOST, special and standard hooks undergo normalizing or hardening after forging or stamping.

How to choose

The choice of a special hook is based on shape, application, and the calculated diameter of the chain, wire rope, or textile rigging element. Models are additionally marked to specify load capacity, to prevent exceeding the breaking load of the element. Material is selected based on the operating environment conditions.

Chain size, mm	Working load, t	P, mm	C, mm	A, mm	D, mm	B, mm	Weight, kg/pc
7/8	2	64	30	125	24	22	0.7
10	3.15	78	36	148	32	29	1.2
13	5.3	89	43	175	40	34	2.3
16	8	102	50	210	49	39	4
20	12.5	111	59	250	58	48	6
22	15	111	66	278	60	57	10.8
26	21.2	113	79	300	66	66	17
32	31.5	145	102	384	80	79	35