Machine Comparison
Doosan Puma GT 3100 vs Haas ST-30
Doosan Machine Tools vs Haas Automation · CNC Lathes / Turning Centers
Summary
The Doosan Puma GT 3100 and the Haas ST-30 are turning centers with the same Z travel, 830 mm (33 in) against 32.5 in (826 mm). The headline difference is spindle torque: the Doosan lists 1,613 N·m (1,190 ft-lb) against 300 ft-lbf @ 500 rpm (407 N·m @ 500 rpm) on the standard Haas, nearly four times as much.
The Puma GT 3100 is also larger at the chuck: a 12 in chuck against 10 in (254 mm), a 481 mm (19 in) turning diameter against 15 in (381 mm), and 35 kW (47 hp) against 30 hp (22.4 kW). The ST-30 runs faster, 3,400 rpm against 2,800 rpm, turns longer parts at 32.5 in (826 mm) against 755 mm (30 in), and has a 12-station turret against 10 tools.
Specifications Comparison
| Specification | Doosan Puma GT 3100 | Haas ST-30 |
|---|---|---|
| X-Axis Travel | 260 mm (10 in) ▲ | 9.4 in (239 mm) |
| Z-Axis Travel | 830 mm (33 in) | 32.5 in (826 mm) |
| Max Turning Diameter | 481 mm (19 in) ▲ | 15 in (381 mm) |
| Max Turning Length | 755 mm (30 in) | 32.5 in (826 mm) ▲ |
| Chuck Size | 12 in | 10 in (254 mm) |
| Max Spindle Speed | 2,800 rpm | 3,400 rpm ▲ |
| Spindle Power | 35 kW (47 hp) ▲ | 30 hp (22.4 kW) |
| Spindle Torque | 1,613 N·m (1,190 ft-lb) ▲ | 300 ft-lbf @ 500 rpm (407 N·m @ 500 rpm) |
| Tool Capacity | 10 | 12-Station BOT |
| Machine Weight | 5,500 kg (12,125 lb) | 10,900 lb (4,944 kg) |
Advantages
Doosan Puma GT 3100
- 1,613 N·m (1,190 ft-lb) of spindle torque against 300 ft-lbf @ 500 rpm (407 N·m @ 500 rpm)
- 35 kW (47 hp) spindle power against 30 hp (22.4 kW)
- 481 mm (19 in) turning diameter against 15 in (381 mm)
- 12 in chuck against 10 in (254 mm)
Haas ST-30
- 3,400 rpm spindle against 2,800 rpm
- 32.5 in (826 mm) turning length against 755 mm (30 in)
- 12-station turret against 10 tools
Verdict
Choose the Doosan Puma GT 3100 for heavy roughing of large-diameter steel and cast-iron parts, forgings and castings: 1,613 N·m (1,190 ft-lb), 35 kW (47 hp) and a 12 in chuck are what that work needs. Choose the Haas ST-30 for smaller-diameter chucked parts and shafts up to 32.5 in (826 mm), where 3,400 rpm and two more tool stations are worth more than torque. Compare the two as standard machines; options change the Haas figures.