Crown Block
Crown Block
The crown frame is made of high strength steel shapes.
Sheave grooves are hardened by medium frequency induction to provide extended service life.
Working sheaves have double-row conical roller bearings and each bearing is individually lubricated.
The rope guard prevents the wire rope from running out of the sheave grooves.
Equipped with wooden bumper blocks and retainer net.
Equipped with a frame crane for use when repairing the sheave groups
Equipped with sand line sheaves and auxiliary sheaves.
The sheaves and bearings are interchangeable with those of matching traveling block
The crown blocks conform to API specification 4F
Model TC30 TC50 TC90 TC135 TC170 TC225 TC315 TC450
Max Hook Load
(KN) 300 500 900 1350 1700 2250 3150 4500
Dia of Wire Line
(mm) 24 24 26 29 29 32 35 38
OD of Sheaves
(mm) 475 610 762 1005 1005 1120 1270 1524
Number of Sheaves 4 5 5 5 6 6 7 7
Size
(mm) length 738 860 2447 2320 2668 2668 3112 3410
Width 472 670 1695 1436 2460 2709 2783 2753
Height 575 588 1624 1781 1855 2469 2800 2938
Weight (kg) 245 464 3260 2775 4540 5650 7600 11012
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Standard：
API SPEC 5CT Standard of American Petroleum Institute
Steel Grade:
J55, K55, N80, L80, N80-1, N80Q P110 etc．
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Design Features：
The housing assembly is made of thick section steel plate to provide enough weight.
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