Model Number

DC Drawworks

FEATURES OF DC DRAWWORKS

l        All bearings are roller bearings. Shafts are made of alloy steel

l        The drum is grooved. Ventilating air clutches constitute the high and low speed ¡ª

l        The brake is hydraulic disc brake The disc of brake is water-cooled or wind-cooled;

l        the auxiliary brake is eddy water-cooled or wind-cooled current brake.

l        being shifted through air clutch;

l        being transmitted through chains;

l        Chains are lubricated by thin oil. bearings are lubricated by grease:

Split construction.

SPECIFICATIONS OF DC DRAWWORKS:

THN Model		JC40D	JC50D	JC70D	JC90D
Nominal drilling depth m	114mm(41/2 in.)	2500-4000	3500-5000	4500-7000	6000-9000
	127mm（5 in）	2000-3200	2800-4500	4000-6000	5000-8000
Rated power DW kW(hp)		735(1000)	1100(1500)	1470(2000)	2210(3000)
Qty. of motor × rated power kW(hp)		2×438(537)/ 1×800(1072)	2×800(1072)	2×800(1072)	3×800(1072)
Rated speed of motor r/min		880/970	970	970	970
Dia. Of wireline mm(in)		32 (1 1/2)	35 (1 3/8)	38 (1 1/2)	42 (1 3/4)
Max. fastline pull kN		275	340	485	630
Main drum size (D×L)mm(in)		640×1139 (251/4×447/8)	685×1138 (27×447/8)	770×1439 （30×531/2）	914×1556 （36×611/4）
Brake disc size (D×W)mm(in)		1500×40 (59×11/2)	1600×76 (63×3)	1600×76 (63×3)	1600×76 (63×3)
Sand drum size(D×L)mm(in)		356×1245 (14×49)	356×1245 (14×49)	356×1245 (14×49)	356×1448 (14×57)
Sand drum capacity (14.5 wireline ) m(in)		4000(13120)	5000(16400)	6400(21000)	7500(24600)
Auxiliary brake		DS40	DS50	DS70	DS90
Dimension(L×W×H)mm		6600×3716×2990	6800×4537×2998	7670×4585×3197	7874×5486×2997