Machine Comparison
Haas ST-20Y vs Mazak Quick Turn 250M
Haas Automation vs Yamazaki Mazak · CNC Lathes
Summary
The Haas ST-20Y and the Mazak Quick Turn 250M are both CNC turning centers in the same speed class: each spindle tops out at 4,000 rpm and each carries 12 tools. The headline difference is part size: the Mazak Quick Turn 250M swings larger work, while the Haas ST-20Y turns slightly longer parts.
The Mazak Quick Turn 250M turns up to Ø15 in (381 mm) against 11.75 in (298 mm), takes Ø3 in (76 mm) bar against 2.5 in (64 mm), and has 9 in (229 mm) of X travel against 8.4 in (213 mm). It is fitted with a 10 in chuck; the Haas ST-20Y uses an 8.3 in (210 mm) chuck. The Haas ST-20Y has the longer Z: 22.5 in (572 mm) of travel and turning length, against 22 in (559 mm) of travel and 20 in (508 mm) of turning length on the Mazak.
Specifications Comparison
| Specification | Haas ST-20Y | Mazak Quick Turn 250M |
|---|---|---|
| X-Axis Travel | 8.4 in (213 mm) | 9 in (229 mm) ▲ |
| Z-Axis Travel | 22.5 in (572 mm) ▲ | 22 in (559 mm) |
| Max Turning Diameter | 11.75 in (298 mm) | Ø15 in (381 mm) ▲ |
| Max Turning Length | 22.5 in (572 mm) ▲ | 20 in (508 mm) |
| Bar Capacity | 2.5 in (64 mm) | Ø3 in (76 mm) ▲ |
| Chuck Size | 8.3 in (210 mm) | 10 in |
| Max Spindle Speed | 4,000 rpm | 4,000 rpm |
| Tool Capacity | 12 | 12 tools |
Advantages
Haas ST-20Y
- 22.5 in (572 mm) max turning length against 20 in (508 mm)
- 22.5 in (572 mm) Z-axis travel against 22 in (559 mm)
Mazak Quick Turn 250M
- Ø15 in (381 mm) max turning diameter against 11.75 in (298 mm)
- Ø3 in (76 mm) bar capacity against 2.5 in (64 mm)
- 9 in (229 mm) X-axis travel against 8.4 in (213 mm)
Verdict
Choose the Mazak Quick Turn 250M for larger-diameter chucking work: flanges, hubs and rings up to Ø15 in (381 mm), and bar up to Ø3 in (76 mm). Choose the Haas ST-20Y for longer, slimmer bar-fed turn-mill parts that need its 22.5 in (572 mm) turning length and fit within 2.5 in (64 mm) bar. Spindle speed and tool count are the same on both, so part diameter and length should decide.