Crown Blocks

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Design Features:

•The drilling line is reeved in parallel.
•The crown frame is made of high strength steel shapes & plates. The lug plate for top drive is provided. It is equipped
with metal base plate, handrail. A ladder has an opening.
• The sheave cluster is tilted to counteract traveling block’s torque. The side plate assembly is faced with derrick man
for ease of picking off & suspending elevators.
• All sheaves have double-row conical roller bearings and each bearing has individual lubricating channel.
• Equipped with wooden bumper blocks and retainer net.
• Equipped with a frame crane for use in repairing the sheaves cluster.
• The sheaves and bearings are interchangeable with those of matching travelling block.
• The crown blocks conform to API Spec. 8A/4F and API monogram is permitted to be used.


Model


TC135

TC170

TC225

TC315

TC450

TC585

Max. hook load

kN

1350

1700

2250

3150

4500

5850

O.D. of sheaves

mm (in)

915(36)

1005(40)

1120(44)

1270(50)

524(60)

1524(60)

Number of sheaves


5

6

6

7

7

8

Dia. of wire line

mm (in)

29 (11/8)

29 (11/8)

32 (11/4)

35 (13/8)

38 (11/2)

42 (15/8)