1. The structure is very compact, Less of the-easy-to-damage-parts, and very easy to control. It can adapt to these outside situations there is no water and no electronic power.
Advantages of hand-held rock drill:
a: Reasonable design
b: Convinient operation
c: Fast drilling velocity
d: Engery-saving
e: Efficient
f: Long service life of parts
g: Parts highly interchangeable and reliable performance etc
h: Both hand held and with airleg available.
Technical Data
| Type | YN27C |
| Weight of main machine | 27kg |
| Overall dimensions(L*W*H) | 746*315*229mm |
| Type of engine | Single cylinder, air cooled two strokes |
| Cylinder diameter*stroke of piston | Φ58*70mm |
| Rotation speed of engine | ≥2450rpm |
| Displacement of engine piston | 185cm³ |
| Type of carburetor | hand needle valve, floatless type |
| Ignition system | controllable silicon, contactless system |
| Drilling speed (mean value of five holes) | ≥250mm/min |
| Drilling hole diameter | 28-42mm |
| Max drilling depth | 6m |
| Fuel consumption | ≤0.12L/m |
| Tank capacity | ≥1.5liter |
| Mixture ratio of gasoline and lubrication oil (in volumes) | 12:01 |
| Drill rod and breaker shank | Hex22*108mm |
| Rotating speed of drill rod | ≥200rounds/min |
| Clearance of spark plug | 0.5-0.7mm |










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