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Hook Blocks Design Features:
1. Joining traveling block and hook together reduces overall Length and can help to satisfy the requirements of operating a top drive.
2. The hook blocks conform to API Specification 8C PSL1 and API monogram can be used
3. Critical driving parts uses advanced heat treatment process such as cementation, can satisfy process requirements of overhead drilling.
4. Before leaving factory all productions have passed depth flaw detection.

Model	YG135	YG170	YG225	YG450
Max.hook load:kN	1350	1700	2250	4500
O.D.of sheaves:mm(in)	760(30)	915(36)	1120(44)	1524(60)
Diameter of wireline:mm(in)	29(1 1/8)	29(1 1/8)	32(1 1/4)	38(1 1/2)
Major-hook opening:mm	150	180	190	220
Spring travel:mm	170	140	180	180

Model	YC225	YC315	YC450	DG315	DG225	DG450
Max.hook load:kN	2250	3150	4500	3150	2250	4500
O.D.of sheaves:mm(in)	1120(44)	1270(50)	1524(60)	-	-	-
Dia meter of wire line:mm(in)	32(1 1/4)	35(1 3/8)	38(1 1/2)	-	-	-
Major-hook opening:mm	-	-	-	220	190	220
Spring travel:mm	-	-	-	200	180	200