Features:
1. The double boom jumbo, owning a drilling speed of 0.8-2 m/min, can work with high efficiency.
2. This underground drilling jumbo machine has an advanced hydraulically controlled drilling system which is safe and simple to operate. The system incorporates the auto stop and anti-jamming function, which make sure that the machine can stop automatically at the end-point and wash itself automatically.
3. It can walk flexibly with direct diesel drive which can transport materials at a long distance.
4. The double boom jumbo has a low center of gravity, great mobility and remarkable stability. It is specially suit for the tunnels of big section.
5. Possessing a line of rock drills, drill jumbos and roof bolters, the double boom jumbo can drill the rock with a much lower cost per meter.

Technical Parameters:
Type DF20-2BD DF20A-2BD
Drill speed (m/min) 0.8-2 0.8-2
Drill rod length (m) 2.475 (standard) 3.05 (standard)
Hole diameter (mm) 27 - 45 27 - 45
Hole depth (once) (m) 2.1 2.7
Cross section W× H (m× M) 2 × 2 - 5.2 × 3.8 2.5 × 2.5 - 5.5 × 4.5
Traveling speed (km/h) 3 3
Climbing capability % 25 25
Rock drill number and type 2× HYD200 2× HYD200
Overall dimensions L× W× H (m) 7.35× 1.35× 1.6 7.95× 1.35× 6

Motor power (kw) 45 45
Voltage (V) 380 or 660 380 or 660
Total weight (kg) 9600 9800
Boom number and type 2× ZB2.4 2× ZB2.9
Up/down (° ) 55/16 55/16
Swinging angle inner/outer (° ) 14/47 14/47
Extension (m) 1.5 1.5
Rotation angle (° ) 180/180 180/180
Impeller number and type 2 × TJ2.1 2 × TJ2.7
Up /down (° ) 105/15 105/15
Pivot angle (left/right) (° ) 45/45 45/45

Note: The above parameters are only for reference. They can be different from the actual parameters.