Machine Comparison
Haas DS-20Y vs Haas ST-40Y
Haas Automation vs Haas Automation · Mill-Turn Machines
Summary
The Haas DS-20Y and Haas ST-40Y are both from Haas Automation's mill-turn machines lineup, making this a common upgrade or lineup decision for shops already invested in the Haas Automation ecosystem. The Haas ST-40Y shows specification advantages in 8 categories, though the Haas DS-20Y may still be the better choice depending on your shop's specific needs and the type of work you run. Both machines are proven performers in production environments and represent solid investments for shops in the market for a mill-turn machine.
Specifications Comparison
| Specification | Haas DS-20Y | Haas ST-40Y |
|---|---|---|
| Tool Capacity | 12-station BMT-65 turret | 12-station BMT-75 turret |
| Bar Capacity | 63.5 mm (2.5 in) | 102 mm (4.0 in) ▲ |
| Control | Haas Next Generation Control (NGC) | Haas Next Generation Control (NGC) |
| Max Cutting Diameter | 298 mm (11.75 in) | 457 mm (18 in) ▲ |
| Max Cutting Length | 572 mm (22.5 in) | 711 mm (28 in) ▲ |
| Spindle Bore | 88.9 mm (3.5 in) | 105 mm (4.13 in) ▲ |
| X Axis Travel | 213 mm (8.4 in) | 375 mm (14.75 in) ▲ |
| Y Axis Travel | ±50.8 mm (±2.0 in) | 102 mm (4.0 in) total / ±50.8 mm (±2.0 in) ▲ |
| Z Axis Travel | 572 mm (22.5 in) | 711 mm (28 in) ▲ |
| Rapid Traverse X Y | 12.0 m/min (472 IPM) | 12.0 m/min (472 IPM) |
| Rapid Traverse Z | 24.0 m/min (945 IPM) | 24.0 m/min (945 IPM) |
| Live Tooling Speed | 6,000 RPM | 6,000 RPM |
| Live Tooling Power | 3.7 kW (5 hp) | 5.6 kW (7.5 hp) ▲ |
| C Axis Positioning | ±0.01° (both spindles) | ±0.01° |
| Price Range | $130,000 - $165,000 ▲ | $190,000 - $245,000 |
Advantages
Haas DS-20Y
- More competitive pricing at $130,000 - $165,000 compared to $190,000 - $245,000
- Backed by Haas Automation's dealer and service network for parts and support
- Production parts with features on both ends that currently require two operations or two machines
Haas ST-40Y
- Superior bar capacity at 102 mm (4.0 in) vs 63.5 mm (2.5 in)
- Superior max cutting diameter at 457 mm (18 in) vs 298 mm (11.75 in)
- Superior max cutting length at 711 mm (28 in) vs 572 mm (22.5 in)
- Superior spindle bore at 105 mm (4.13 in) vs 88.9 mm (3.5 in)
- Superior x axis travel at 375 mm (14.75 in) vs 213 mm (8.4 in)
Verdict
The Haas ST-40Y edges ahead on specifications in this comparison, particularly in Bar Capacity and max cutting diameter. However, the Haas DS-20Y remains competitive and may be the better choice depending on price, dealer support in your area, or specific workholding and tooling considerations. Both are capable machines — the best decision comes from running your actual parts and evaluating total cost of ownership including tooling, training, and service.