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| Place of Origin | Henan, China (Mainland) |
| Brand Name | HF |
| Model Number | HF-20A |
| Usage | Pile Holes |
| Type | Rotary Drilling Rig |
| Condition | New |
| Drilling Diameter | 2.0m |
| Drilling Depth | 80m |
| Max. Torque | 40kN.m |
| Max Pressure Force | 100kN |
| Max. Lifting Force | 120kN |
| Feeding Stroke | 400mm |
1. Big-hole engineering drill
2. unites the tower and machine
3. integrates turnplates, power heads and main shaft drills
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HF-20A Big-hole Engineering Drill for Pile Holes I. Application HF-20A drill is a light weight big-hole engineering drill, it units the tower and machine body together. HF20A integrates the drill's advantages of the types turnplates, the power heads and the main shaft drills. The drill has such advantages as high drilling efficiency and precision, powerful torque, wider ranges of speed and smaller coefficient of oversize of hole. It can drill in the ways of forcing feed or reducing bit load drilling by hydraulic system. Oil cylinder of the drill can raise or pull down the tower safely and quickly, move and fit the hole position conveniently. After moving the machine, the bit of two metre diameter can be directly lifted or run in. Height of the tower is ten and five metres, which can directly pull down the steel cages. The assistant hoist's capacity is strong. The drill is equipped with step device as to fitting the hole position conveniently. The control handlebars are collected so easy to operating. The drill can be used in the drilling technologies of normal or reverse circulation in the quaternary period gravel or hard rock ground. The drill can be mainly used for big-hole grouting pile holes drilling of high building, port and bridge. II. Main Technical Parameters
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