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Weight: 27 kg
Hole Diameter: Φ28–42 mm
Max. Drilling Depth: 6 m
Drilling Speed: ≥250 mm/min
Shank Size: H22 × 108 mm
Engine Speed: ≥2,450 r/min
Weight: 27 kg
Hole Diameter: Φ28–42 mm
Max. Drilling Depth: 6 m
Drilling Speed: ≥250 mm/min
Shank Size: H22 × 108 mm
Engine Speed: ≥2,450 r/min
General introduction
The gasoline engine drives the piston and integrated air-compression system to generate repeated impact energy. The hammer piston strikes the drill shank while the internal ratchet mechanism rotates the drill rod, allowing the bit to continuously crush the rock and form the borehole.
Application
The YN27C gasoline rock drill performs drilling, breaking, crushing, tamping and chiselling operations. It is widely used in mining, quarrying, construction, roadwork, railway maintenance, geological exploration and defence projects, as well as for breaking concrete and asphalt surfaces.

YN27C Technical Parameters
Parameter | Specification |
Model | YN27C |
Machine Weight | 27 kg |
Overall Dimensions | 746 × 315 × 229 mm |
Engine Type | Single-cylinder, air-cooled, two-stroke |
Cylinder Bore × Piston Stroke | Φ58 × 70 mm |
Engine Speed | ≥2,450 r/min |
Engine Displacement | 185 cm³ |
Carburetor Type | Hand needle valve, non-float type |
Ignition System | Contactless electronic ignition |
Drilling Speed | ≥250 mm/min |
Hole Diameter | Φ28–42 mm |
Maximum Drilling Depth | 6 m |
Fuel Consumption | ≤0.12 L/m |
Fuel Tank Capacity | ≥1.14 L |
Gasoline–Lubricating Oil Ratio | 12:1 |
Drill Rod Shank Size | H22 × 108 mm |
Drill Rod Rotation Speed | ≥200 r/min |
Spark Plug Gap | 0.5–0.7 mm |

Features
1. Drilling and Breaking Functions
Switch easily between drilling and breaking operations using the control handle.
2. Easy and Efficient Operation
Simple operation saves time and labour while providing fast drilling and high efficiency.
3. Interchangeable Parts
Reliable construction with spare parts interchangeable with similar rock drills.
4. Flexible Drilling Angles
Suitable for vertical, horizontal and inclined drilling, with a maximum drilling depth of 6 m.
5. Portable Design
Weighing only 27 kg, it can be operated by one person and is ideal for remote areas without electricity or compressed-air equipment.
6. Wide Temperature Range
Performs reliably in harsh environments from −40°C to 40°C.
7. Self-Powered Operation
Powered by gasoline without auxiliary equipment, making it convenient for mobile and temporary projects.
8. Wide Rock Compatibility
Suitable for iron, copper, manganese, lead-zinc and gold mines, as well as granite, bluestone, jade and other rock formations.

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