Machine Comparison
Haas ST-20Y vs Mazak Quick Turn 250MSY
Haas Automation vs Yamazaki Mazak · CNC Lathes / Turning Centers
Summary
The Haas ST-20Y and the Mazak Quick Turn 250MSY are Y-axis turning centers with the same 4,000 rpm main spindle speed, 12 tools and 4 in (102 mm) of total Y travel, written as ± 2 in (± 51 mm) on the Haas. The Mazak is the larger-capacity machine and is aimed at finishing both ends of a part in one cycle; on the Haas ST-20Y the sub-spindle is an option.
The Mazak Quick Turn 250MSY turns Ø15 in (381 mm) against 11.75 in (298 mm), passes Ø3 in (76 mm) bar against 2.5 in (64 mm) and carries a 10 in chuck against 8.3 in (210 mm). The Haas has the longer turning length, 22.5 in (572 mm) against 21 in (533 mm). Where a sub-spindle is fitted, both run it to 6,000 rpm.
Specifications Comparison
| Specification | Haas ST-20Y | Mazak Quick Turn 250MSY |
|---|---|---|
| X-Axis Travel | 8.4 in (213 mm) | 9 in (229 mm) ▲ |
| Y-Axis Travel | ± 2 in (± 51 mm) | 4 in (102 mm) |
| Z-Axis Travel | 22.5 in (572 mm) | 23 in (584 mm) ▲ |
| Max Turning Diameter | 11.75 in (298 mm) | Ø15 in (381 mm) ▲ |
| Max Turning Length | 22.5 in (572 mm) ▲ | 21 in (533 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 |
| Sub-Spindle Speed | 6,000 rpm | 6,000 rpm |
| Tool Capacity | 12 | 12 tools |
Advantages
Haas ST-20Y
- 22.5 in (572 mm) turning length against 21 in (533 mm)
- Sub-spindle is an option, so a shop that only needs Y-axis milling on one side can leave it off
Mazak Quick Turn 250MSY
- Ø15 in (381 mm) maximum turning diameter against 11.75 in (298 mm)
- Ø3 in (76 mm) bar capacity against 2.5 in (64 mm)
- 10 in chuck against 8.3 in (210 mm)
- 9 in (229 mm) of X travel against 8.4 in (213 mm)
Verdict
Size decides this one. Parts over 11.75 in (298 mm) in diameter or bar over 2.5 in (64 mm) need the Mazak Quick Turn 250MSY, which also suits shops that want both ends finished in one cycle as the normal way of working. For bar-fed turn-mill parts up to 2.5 in (64 mm) and longer chucked parts, the Haas ST-20Y covers the work, with the sub-spindle, parts catcher or parts loader added only if the job calls for them.