Specifications

crown block:
1.standard: API 8A&4F.
2.Type:TC30,TC50,TC90,TC135,TC170,TC225,TC315,TC450,TC585

crown block

1. The crown block conform to API Spec. 8A&4F.
2. Type:TC30,TC50,TC90,TC135,TC170,TC225,TC315,TC450,TC585
3. The sheave grooves are intermediate frequency quenched so as to provide surface hardness and extend service life of sheaves.
4. The drilling line is reeved in paralle or in blend.
5. The sheaves and bearings are interchangeable with those of matching travelling block.

 

Model	TC30	TC50	TC90	TC135	TC170	TC225	TC315	TC450	TC585
Max. hook load KN	300	500	900	1350	1700	2250	3150	4500	5850
O.D. of sheaves mm(in)	475(18 3/4)	510(24)	762(30)	915(36)	1005(40)	1120(44)	1270(50)	1524(60)	1524(60)
No. of sheaves mm(in)	4	5	5	5	6	6	7	7	8
Dia. of wire line mm(in)	24(15/16)	24(15/16)	26(1)	29(1 1/8)	29(1 1/8)	32(1 1/4)	35(1 3/8)	38(1 1/2)	42(1 5/8)