High-capacity rotary drilling rig, stable output for heavy-load urban and civil foundation drilling.
| Model | ZOOMLION ZR255R |
| Max.drilling diameter | 1700 mm |
| Max.drilling depth | 56/70 m |
| Max.output torque | 260 kN·m |
| Rotary speed range | 6-26 rpm |
| Crowd foece push | 225 kN |
| Crowd force pull | 260 kN |
| Max.stroke crowd | 13 m |
| Rated power of engine | 264/2200 kW |
| Emission | Stage III |
| Operation weight | 87 t |