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We are the professional supplier trade drilling tools and equipment.whch are specially chosen by SINO-PETROL and SINO-PEC.Besides the regular products, we alos supply products per requirements of customer. Travelling bolck(travelling sheave)complete according to API 8A with sheaves grooves are abrasion resistance and long service life. Travelling bolck(travelling sheave) spections TC30 TC50 TC90 TC135 TC170 TC225 TC315 TC450 maximumcarryingcapacitykN(1bs) 300(66000) 500(110000) 900(200000) 1350(300000) 1700(37400) 2250(500000) 3150(700000) 4500(1000000) mm(in)trackcablediameter 24(15/16) 24(15/16) 26(1) 29(11/8) 29(11/8) 32(11/4) 35(13/8) 38(11/2) mm(in)outsidediameter 475(183/4) 610(24) 660(26) 1005(40) 1005(40) 1120(44) 1270(50) 1524(60) numberofbull 4 5 5 5 6 6 7 7 mm(in) l 738(29) 860(337/8) 1208(479/16) 2320(9111/32) 2668(105) 2668(105) 3112(123) 3407(134) w 472(185/8) 670(267/16) 1092(43) 1436(5617/32) 2460(97) 2709(107) 2783(110) 2722(107) h 575(225/8) 588(231/8) 1207(471/2) 1781(701/2) 1855(73) 2469(97) 2800(110) 2856(112) weightkg(1bs) 245(540) 464(1023) 1500(3307) 2775(6118) 4540(9988) 5270(11594) 7600(16720) 9750(21450)