I. General
HF-44A Core Drill, a new type of product with enhanced capacity, is a kind of hydraulic-driven, spindle, diamond-bit, small-diameter core drill with fairly powerful drilling force. It is mainly suitable for exploration of metal or non-metal solid mineral ore bed. It is widely applied in core drill with diamond bit or hard tungsten-carbide-tipped bit and diamond bit in the field of geology, metallurgy, coal mine, hydrological and engineering drilling. It can also be used in the fields of superficial-zone
petroleum and natural gas mining, mine workings ventilation and water discharge tunnel drilling as well as foundation pile construction in large diameter. It is in reasonable structure, light weight, powerful capacity, multiuse, steady performance, high responsibility and high standardization and generalization.
1) Core Drilling
Drill Rod Varieties | Drill Rod Type | Drill Depth | |
Drill Rod Made in China | Planer in and out | dia43×6mm(1.69×0.24 inch) | 1400 m (4592feet) |
dia54×6 mm(2.13×0.24 inch) | 1000 m (3280feet) | ||
dia67×6 mm(2.64×0.24 inch) | 830 m (2722feet) | ||
Thickened Inner | dia50×5.5 mm(1.97×0.22 inch) | 1300 m (4264feet) | |
dia60×6 mm(2.36×0.24 inch) | 950 m (3116feet) | ||
Extracting Core with
Wire Line | dia55.5×4.73mm(2.19×0.19inch) | 1400 m (4592feet) | |
dia71×5 mm(2.80×0.20 inch) | 1000 m (3280feet) | ||
dia89×5 mm(3.50×0.20 inch) | 800 m (2624feet) | ||
DCDMA (Diamond Core Drill Manufacturer Association) made Drill Rod | Thickened Inner | BW | 1250 m (4100feet) |
NW | 1000 m (3280feet) | ||
HW | 660 m (2165feet) | ||
Extracting Core with
Wire Line | BQ | 1400 m (4592feet) | |
NQ | 1100 m (3608feet) | ||
HQ | 750 m (2460feet) | ||
2. Drilling Angel ~0 to 360°
3. Power Engine |
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Electromotor | Y225S~4 | 37KW(49.62HP) | 1480 r/min |
Diesel engine | Deutz F6L 912 | 82KW(110HP) | 1500 r/min |
4. Rotator
Type: Feeding with double oil cylinders hydraulic pressure, rotating mechanically. Spindle I.D~93 mm (3.66 inch)
Speed of spindle:
Speed of Power eng. (r/min) | 1480 (for core drilling) |
Positive Low Speed (r/min) | 83, 152, 217, 316 |
Positive High Speed (r/min) | 254, 468, 667, 970 |
Negative Speed (r/min) | 67, 206 |
Max. torque of spindle~3.2 KN·m (2358 lbf·ft)
Spindle stroke~600 mm (23.62 inch)
Max. lifting force of spindle ~120 KN (26976 lbf)
Max. thrust of spindle~90 KN (20232 lbf)
5. Hoist
Form planetary gearing
Wire rope dia~17.5 mm(0.69 inch) or 18.5 mm(0.73 inch)
Drum capacity for rope(170 kg/mm2 equivalent to 241839 lb/inch2) ~ (17.5mm steel wire rope) 110m(360.8 feet)
(18.5mm steel wire rope) 90m(295.2 feet) Max. lifting force (single rope)~45 KN (10116 lbf)
Lifting speed of the wire rope
Power eng speed 1000r/min 0.47; 0.86; 1.22; 1.78 m/s (1.54; 2.82; 4.00; 5.84 feet/s) Power eng speed 1500r/min 0.70; 1.29; 1.84; 2.68 m/s (2.30; 4.23; 5.90; 8.79 feet/s) Power eng speed 1700r/min 0.805; 1.485; 2.12; 3.08 m/s (2.64; 4.87; 6.95; 10.10 feet/s)
6. Clutch
Form: Dry single chip friction clutch
7. Gearbox
Form: sliding gearbox (4 speeds are positive and 1 is negative).
8. Oil Pump
Form: Single Gear Pump
Displacement ~32+12 L/min (8.5+3.2 US Gallons/min)
Working pressure ~0 to 8 MPa (0~1160 psi)
Max. pressure ~12 MPa (1740 psi)
9. Water Brake
Working speed (r/min) ~700-800
Single rope compensational speed~3--8 m/s (9.84--26.2 feet/s)
Single rope compensational load~45 KN (10116 lbf)
10. Drill Frame
Form sliding skids type (with sliding base)
Drill backward stroke ~460 mm (18.11 inch)
11. Dimensions (L×W×H) ~3030×1100×1890 mm (119.3×43.3×74.4 inch)
12. Weight of drill (without power unit) ~about 2150 kg(4741 lb)
13. Max. weight of dischargeable apparatus ~300 kg (662 lb)