This series of machine shall be the special purpose machine for turning and boring the inner hole which is applicable for turning and boring the inner hole of cylindrical parts of different materials with the help of hard alloy cutters, it is equipped with the displacement tool post for turning the end face of workpiece.
| Parameters | Model | T91160 ×L/18 | T91200 ×L/12 | T91250 ×L/40 |
| Type of lathe bed guideway | Integrated two guideways on lathe bed | Integrated two guideways on lathe bed | Integrated three guideways on lathe bed | |
| Max. swing diameter(mm) – On lathe bed | φ1600 | φ2000 | φ2500 | |
| Max. workpiece length L (mm) | 3000 ~ 8000 | 3000 ~ 8000 | 3000 ~ 8000 | |
| Max. workpiece weight (t) | 18 | 12 | 40 | |
| Dimension of spindle taper hole (mm) | φ120 1:7 | φ120 1:7 | φ196.869 1:4 | |
| Max. faceplate torque (kN·m) | 50 | 22 | 63 | |
| Faceplate diameter (mm) | φ1600 | φ1600 | φ2500 | |
| Steps and range of spindle rotational speed (r/min) | DC stepless 0.8 ~ 160 | DC stepless 0.8 ~ 160 | DC stepless 1 ~ 60 | |
| Diameter range of boring hole (mm) | φ300 ~ φ800 | φ800 ~ φ1600 | φ1200 ~ φ2000 | |
| Max. torque of boring hole (kN·m) | 50 | 20 | — | |
| Diameter of boring rod (mm) | φ180 φ300 | φ600 | φ610 | |
| Machining diameter of cutter disc (mm) | Small cutter disc: φ300 ~ φ500Large cutter disc: φ500 ~ φ800 | Large cutter disc: φ800 ~ φ1250Large cutter disc: φ1250 ~ φ1600 | Small cutter disc: φ1200 ~ φ1500Large cutter disc: φ1500 ~ φ2000 | |
| Boring rod feed (mm/min) | 0.76 ~ 120 | 0.76 ~ 120 | 1 ~ 150 | |
| Boring rod fast movement (mm/min) | 2450 | 2450 | 2500 | |
| Power of main motor (kW) | 55 | 55 | 75 |
