Machine Comparison
Haas ST-20Y vs Mazak Quick Turn 250M
haas vs mazak · CNC Lathes
Summary
The Haas ST-20Y and Mazak Quick Turn 250M both offer Y-axis milling capability in a turning center footprint, but they're aimed at different buyers. The ST-20Y is Haas's answer to shops that want live tooling and Y-axis work without breaking the budget. At $80K-$110K, it's one of the most affordable ways to get into multi-axis turning. The Quick Turn 250M, on the other hand, sits firmly in the production tier at $120K-$180K, and the price gap isn't just branding. Mazak's machine brings a beefier 18.5kW spindle versus 15kW on the Haas, a larger A2-8 spindle nose, a 254mm chuck compared to 210mm, and critically, 65mm bar capacity versus 51mm. That's the difference between running 2-inch bar stock and running 2.5-inch bar stock, which opens up a much wider range of parts. The Mazak also uses a BMT-style turret rather than the Haas BOT configuration, giving it better rigidity during milling operations. The Quick Turn 250M weighs in at 4,200kg against the Haas's 3,583kg, and that extra mass translates directly to vibration damping during heavy cuts. Where the Haas fights back is on total cost of ownership. Parts are cheaper, the NGC control is straightforward to learn, and the purchase price leaves money in the budget for tooling. For shops running mixed short-run work, the ST-20Y gets the job done at a price point that's hard to argue with. But if you're quoting production contracts where cycle time and capability pay for themselves, the Mazak earns its premium.
Specifications Comparison
| Specification | Haas ST-20Y | Mazak Quick Turn 250M |
|---|---|---|
| Max Workpiece Diameter | 356mm (14 in) | 366mm (14.4 in) ▲ |
| Max Turning Length | 533mm (21 in) | 531mm (20.9 in) |
| Max Spindle Speed | 4,000 RPM | 4,000 RPM |
| Spindle Power | 15kW (20 hp) | 18.5kW (25 hp) ▲ |
| Chuck Size | 210mm (8 in) | 254mm (10 in) ▲ |
| Bar Capacity | 51mm (2 in) | 65mm (2.56 in) ▲ |
| Tool Capacity | 12-station BOT | 12-position BMT ▲ |
| Rapid Traverse | 30.5 m/min | 30 m/min |
| Machine Weight | 3,583 kg | 4,200 kg ▲ |
| Control | Haas NGC | MAZATROL SmoothG |
| Price Range | $80K-$110K ▲ | $120K-$180K |
Advantages
Haas ST-20Y
- Significantly lower purchase price ($80K-$110K vs $120K-$180K) leaves budget for tooling and fixturing
- Lower cost of ownership with cheaper replacement parts and widely available service
- NGC control is easy to learn, reducing training time for new operators
- Slightly faster rapids at 30.5 m/min for reduced non-cutting time
- Large dealer and support network across North America with next-day parts availability
- Strong resale value relative to purchase price if the shop outgrows the machine
Mazak Quick Turn 250M
- 25% more spindle power (18.5kW vs 15kW) for heavier cuts in tougher materials
- BMT turret design provides superior rigidity during live-tool milling operations
- Larger 65mm bar capacity opens up a wider range of bar-fed production work
- 617kg heavier frame means better vibration damping and surface finish on demanding cuts
- MAZATROL conversational programming lets operators go from print to first part faster
- 10-inch chuck handles larger diameter workpieces for second-op and chucking work
Verdict
If you're a job shop adding Y-axis capability for the first time and budget matters, the Haas ST-20Y is the smart buy. It won't match the Mazak's raw capability, but at roughly 60% of the cost, it gets you into live-tool Y-axis turning without a massive capital commitment. The NGC control is dead simple, parts are affordable, and Haas service is everywhere. But if you're running production and need to push harder materials, feed bigger bar stock, or rely on BMT rigidity for complex milling, the Quick Turn 250M justifies its premium. Shops that quote work requiring 2-inch-plus bar capacity don't really have a choice here. For pure production throughput, the Mazak's combination of power, rigidity, and MAZATROL programming will pay back the price difference over time.