Production Introduce small size portable tunnel rig, tunnel drilling rig for underground projects DFU-300 tunnel drilling rig sale is designed for underground mining drilling, the machine is compact volume, light weight, easy to operate in tunnel.  Technical Parameter

1.Drilling depth
Φ55mm(2.17inch)	300m(984feet)
Φ71mm(2.80inch) drill rod	200m(656feet)
2. Drill rod spec.	Φ55×1500mm drill rod ; Φ71×1500mm drill rod
3. The range of spindle rotating speed	425-1280rpm
4.The max. rotating torque of spindle	795 N·m(586 lbf·ft)
5. The working pressure:	25 Mpa(3626 psi)
6. Spindle stroke	1600mm(63 inch)
7. The max. Lifting force of drill head	62KN(13938 lbf)
8. max. Feeding force of drill head:	33KN(7418 lbf)
9. The sliding stroke of mast	495mm(19.5 inch)
10. The swing angle of mast bracket  (left & right)	90°
11. The swing angle of arm(up and down)	100°
12. Power unit	YB225M-4(dIICT4) explosion-proof

Features 1. It is separate in structure, small in size, light in weight, flexible in movement and convenient in operation.

2. The hydraulic pump is driven by explosion~proof electric motor through operating system, then the hydraulic pump
enforces hydraulic motor to make drill head rotate, and at the same time, the movement of drill head is realized by oil
cylinder & chain double speed mechanism.

3. Hydraulic chuck can satisfy the function of shackles and power-off protection.

4. The sliding and extending & retracting function of the mast makes it convenient for the bottom of mast to touches the
ground or platform, thus the drill rig will be more stable.

5. The swinging arm and mast can do luffing movement, which satisfy the request of multi-angle drilling.
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