

| Model | YN27J(YN27A) | YN30A | |
| Weight | Kg | 26-27.5 | 28 | 
| L*W*H | Mm | 746*315*229 | --- | 
| Diameter of engine piston | Mm | 58 | 58 | 
| Stroke of engine piston | Mm | 70 | 70 | 
| Rotating speed of engine with load | Rpm | 2,450 | 2,700-3,000 | 
| Drilling speed | Mm/Min | 250 | 200 | 
| Oil consumption | L/M | 0.12 | 0.13 | 
| Max. Drilling depth | M | 6 | 6 | 
| End of tool shank(Hex*L) | Mm | 22*108 | 22*108 | 
| Front end of breakeer(Hex*L) | Mm | 22*108/25*108 | 25*108 |