Machine Comparison
Haas DS-30Y vs Haas ST-15Y
Haas Automation vs Haas Automation · Mill-Turn Machines
Summary
The Haas DS-30Y and Haas ST-15Y are in different categories and serve different jobs. The DS-30Y is a dual-spindle Y-axis mill-turn machine for done-in-one bar work; the ST-15Y is a compact single-spindle Y-axis lathe. Both have ± 2 in of Y travel, 12 stations, 4,000 rpm live tools and 472 ipm (12 m/min) rapids.
The DS-30Y is larger and stronger: 32.5 in (826 mm) of turning length against 16 in (406 mm), a 13.75 in (349 mm) turning diameter against 11 in (279 mm), 30 hp (22.4 kW) and 275 ft-lbf against 20 hp (14.9 kW) and 150 ft-lbf, and 3 in (76 mm) bar against 2.5 in (64 mm). The ST-15Y lists at US$108,995 against US$183,995 and weighs 7,900 lb against 12,200 lb.
Specifications Comparison
| Specification | Haas DS-30Y | Haas ST-15Y |
|---|---|---|
| X-Axis Travel | 9.4 in (239 mm) ▲ | 7.88 in (200 mm) |
| Y-Axis Travel | ± 2 in (± 51 mm) | ± 2 in (± 51 mm) |
| Z-Axis Travel | 32.5 in (826 mm) ▲ | 16 in (406 mm) |
| Max Turning Diameter | 13.75 in (349 mm) ▲ | 11 in (279 mm) |
| Max Turning Length | 32.5 in (826 mm) ▲ | 16 in (406 mm) |
| Bar Capacity | 3 in (76 mm) ▲ | 2.5 in (64 mm) |
| Chuck Size | 10 in (254 mm) | 8.3 in (210 mm) |
| Max Spindle Speed | 4,500 rpm ▲ | 4,000 rpm |
| Spindle Power | 30 hp (22.4 kW) ▲ | 20 hp (14.9 kW) |
| Spindle Torque | 275 ft-lbf @ 500 rpm (373 N·m @ 500 rpm) ▲ | 150 ft-lbf @ 500 rpm (203 N·m @ 500 rpm) |
| Spindle Taper / Nose | A2-6 | A2-6 |
| Sub-Spindle Speed | 4,000 rpm | 6,000 rpm ▲ |
| Live Tool Speed | 4,000 rpm | 4,000 rpm |
| Tool Capacity | 12 | 12 |
| Rapid Traverse | 472 ipm (12 m/min) | 472 ipm (12 m/min) |
| Machine Weight | 12,200 lb (5,533.9 kg) | 7,900 lb (3,583 kg) |
| Published List Price | US$183,995 | US$108,995 |
Advantages
Haas DS-30Y
- Second spindle for front and back machining in one cycle
- 32.5 in (826 mm) turning length against 16 in (406 mm)
- 30 hp (22.4 kW) and 275 ft-lbf against 20 hp (14.9 kW) and 150 ft-lbf
- 3 in (76 mm) bar capacity and 4,500 rpm against 2.5 in (64 mm) and 4,000 rpm
Haas ST-15Y
- Lower list price, US$108,995 against US$183,995
- Lighter machine at 7,900 lb (3,583 kg) against 12,200 lb (5,533.9 kg)
Verdict
These machines serve different jobs. The Haas DS-30Y is for production runs of parts with features on both ends, from bar up to 3 in and up to 32.5 in long, where the second spindle removes a second operation. The Haas ST-15Y is for smaller bone screws, fittings and aerospace parts under 11 in in diameter, where one spindle with Y-axis milling is enough at a lower list price.