AC VF drawworks features
- All bearings are roller bearing, all shaft material are alloy steel.
- The drum is grooved.
- Automatic feeding device
- The main brake is hydraulic disk brake, water-cooled or air-cooled.
- The auxiliary brake is dynamic brake.
- Single-shaft drawworks
- Dual stage gear reducer transmission, manual gear change
- The gear is oil-lubricated
Specifications of AC VF drawworks
|
model
|
JC40DB
|
JC50DB
|
JC70DB
|
JC90DB
|
|
Nominal drilling depth
m
|
114mm
drill pipe
|
2500-4000
|
3500-5000
|
4500-7000
|
6000-9000
|
|
127mm
drill pipe
|
2000-3200
|
2800-4500
|
4000-6000
|
5000-8000
|
|
Power rating
kW (hp)
|
735 (1000 )
|
1100 (1500 )
|
1470 (2000 )
|
2210 (3000 )
|
|
Qty. of motor x power rating
kW (hp)
|
1 ×720
|
2 ×720
|
2 ×1100
|
3 ×1100
|
|
Motor rated speed r/min
|
601
|
660
|
660
|
660
|
|
Drill line Dia. mm(in)
|
32 (1 1/4 )
|
35 (1 3/8 )
|
38 (1 1/2 )
|
45 (1 3/4 )
|
|
Max. drill line load kN
|
275
|
340
|
485
|
630
|
|
Drum size (Dia. x width) mm(in)
|
640×1139
(25 1/4 ×44 7/8 )
|
685×1138
(27 ×44 7/8 )
|
770×1439
(30 ×53 1/2 )
|
914×1556
(36 ×61 1/4 )
|
|
Brake disc size (Dia. x width) mm(in)
|
1500×76
(59 ×3)
|
1600×76
(63×3)
|
1520×76
(59 3/4)
|
1800×76
(70 7/8 ×3)
|
|
Automatic feeding motor power
kW (hp)
|
45(60)
|
45(60)
|
45(60)
|
45(60)
|
|
Transmission
|
Single stage gear
|
Dual stage gear
|
Dual stage gear
|
Dual stage gear
|
|
Auxiliary brake
|
Dynamic brake
|
Dynamic brake
|
Dynamic brake
|
Dynamic brake
|
|
Dimension (L x W x H) mm
|
4230×3000
×2630
|
5500×3100
×2650
|
4570×3240
×2700
|
6000×3400
×2906
|
|
Weight kg
|
18600
|
22500
|
30000
|
42000
|
