Crown Block The retaining bar can prevent drill line from jumping out of and jumping off sheave grooves. Sheave grooves are medium-frequency induction hardened, prolonging the sheave service life. Sheave bearings are lubricated individually with the grease cup at the shaft end. Sheaves and bearings of the crown block may be interchanged with those of the traveling block. The crown clocks conform to API Spec 8A /4F. Product Specifications For Crown Block Model Unit TC-135 TC-170 TC-225 TC-315 TC-450 TC-585 Max. Hook Load kN 1,350 1,700 2,250 3,150 4,500 5,850 lbs 300,000 370,000 500,000 700,000 1,000,000 1,300,000 Wire line O.D. mm 29 29 32 35 38 42 inch 1 1/8 1 1/8 1 1/4 1 1/8 1 1/2 1 5/8 Sheave O.D. mm 1,016 1,016 1,120 1,270 1524 1,524 inch 40 40 44 50 60 60 Sheave No. No. 5 6 6 7 6 8 Overall Dimensions L/ mm 2,320 2,668 2,668 3,192 3410 3,625 inch 91 21/62 105 3/76 105 3/76 125 2/3 134 1/4 142 43/60 W/mm 2,076 2,460 2,710 2,783 2753 2,832 inch 81 52/71 96 17/20 106 9/13 109 55/97 108 22/57 111 1/2 H/mm 3 1,856 2,469 2,350 2420 2,580 inch 70 1/2 70 1/2 70 1/2 70 1/2 70 1/2 70 1/2 Approx. Weight Kg 2,670 4,540 6,500 8,500 11100 12,100 lbs 5,933 10,089 14,444 18,889 24,667 26,889
