We would like to introduce ourselves as the leading exporter of internal combustion rock drill in China. We handle this product from 1995 until now. Our model YN27, YN27C and YN27T, are all gasoline powered rock drill and breakers. YN27C and YN27T have breaker function, and YN27T is equipped with anti-vibration handle. YN27 is just a rock drill, without breaker function. These models are now well sold in Yemen, Pakistan, Afghan and New Zealand. The function, stability and surface are quite similar with the famous brand in Sweden. However our prices are much more cheaper.

Please find the technical specifications as follows:

1. Weight of machine: 27kg; 
2. Overall dimensions: 746 x 315 x 229mm; 
3. Type of engine: Single cylinder, air cooling, two strokes; 
4. Cylinder diameter x piston journey: 58 x 70mm; 
5. Running speed of engine: >= 2450r/min; 
6. Exhaust volume of engine piston: 185 cm3; 
7. Type of carburetor: Manual needle valve, non-floater valve type; 
8. Ignition system: Controllable silicon, contactless system; 
9. Drilling speed: >= 250mm/min (mean value of 5 holes drilled continuously by drill bit of diameter 34mm and drill rod of length 600mm, drilling granite with hardness at f=8 ~ 12); 
10. Max drilling depth: 6m; 
11. Tank capacity: >= 1.14 litre; 
12. Fuel consumption: <= 0.12 litre/minute; 
13. Mixture ratio of gasoline and lubricating oil(in volume): 12: 1; 
14. End dimension of drill rod: (hexagonal) 22 x 108mm; 
15. Rotating speed of drill rod: >= 200 r/min; 
16. Clearance of spark plug: 0.5 ~ 0.7mm.