Mazak QT-Ez 8MY
Key Specifications
X Travel
Y Travel
Z Travel
max turning diameter
max machining length
swing over bed
Overview
The Mazak QT-Ez 8MY adds Y-axis milling capability to the value-oriented QT-Ez 8-inch turning center, enabling off-center machining at a price that directly challenges the Haas ST-20Y and Doosan Lynx 2600MY. The MY designation means milling with Y-axis travel for producing hex flats, eccentric holes, keyways, and D-cuts without removing the part from the lathe.
The main spindle delivers 15 kW (20 hp) at up to 4,500 RPM through an A2-6 spindle nose with 52 mm (2.05 in) bar capacity. The 12-station turret runs live tools at 6,000 RPM with 3.7 kW (5 hp), and the Y-axis provides 100 mm (+50/-50 mm) of off-center travel with C-axis indexing at 0.0001-degree resolution. Max turning diameter is 343 mm (13.5 in) with 569 mm (22.4 in) turning length.
Axis travels are 200 mm (X), 100 mm (Y), and 540 mm (Z) with rapids of 30 m/min on X and Z, and 10 m/min on Y. At approximately 4,400 kg (9,700 lb), the machine adds about 400 kg over the QT-Ez 8M for the Y-axis slide assembly. The BMT 55 turret option provides solid milling rigidity.
Running MAZATROL SmoothEz, the control simplifies Y-axis programming through dedicated conversational cycles. The QT-Ez 8MY delivers genuine mill-turn versatility at value pricing. New machines run $95,000-$140,000. For shops that also need a sub-spindle, look at the QT-Ez 8MSY. Specs sourced from Mazak Corporation published data.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 343 mm (13.5 in) |
| Max Machining Length | 21.22″ |
| Swing Over Bed | 580 mm (22.83 in) |
| Bar Capacity | 52 mm (2.05 in) |
| X-Axis Travel | 200 mm (7.87 in) |
| Y-Axis Travel | 100 mm (±50 mm) |
| Z-Axis Travel | 540 mm (21.26 in) |
| Main Spindle Speed | 4,500 RPM |
| Main Spindle Power | 15 kW (20 hp) |
| Main Spindle Nose | A2-6 |
| Live Tool Speed | 6,000 RPM |
| Live Tool Power | 3.7 kW (5 hp) |
| Tool Stations | 12 |
| Turret Type | BMT 55 or bolt-on live tooling turret with Y-axis |
| Chuck Size | 12" |
| C Axis Resolution | 0.0001 degrees |
| Rapid Traverse X | 30 m/min (1,181 ipm) |
| Rapid Traverse Y | 10 m/min (394 ipm) |
| Rapid Traverse Z | 30 m/min (1,181 ipm) |
| CNC Control | MAZATROL SmoothEz |
| Machine Weight | 4,400 kg (9,700 lb) |
| Max Machining Diameter | Φ13.5″ |
Specifications sourced from mazak.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Y-axis with 100 mm travel enables hex flats, eccentric holes, D-cuts, and keyways at value pricing
- Built-in motor spindle eliminates belt vibration for smoother surface finishes
- BMT 55 turret option provides excellent milling rigidity for off-center operations
- MAZATROL SmoothEz simplifies Y-axis programming through dedicated conversational cycles
- Competitive pricing puts Mazak Y-axis capability in Haas ST-20Y territory
- 569 mm turning length handles parts up to 22 inches without a long-bed option
Limitations
- 52 mm bar capacity is smaller than the 65 mm offered on QTE-200MY and some competitors
- 15 kW spindle power limits aggressive roughing in harder materials at larger diameters
- 3.7 kW live tool power restricts milling to lighter operations
- SmoothEz control lacks some advanced SmoothG features
Best For
Frequently Asked Questions
01
New QT-Ez 8MY machines run $95,000-$140,000 depending on options. The Y-axis adds roughly $15,000-$20,000 over the QT-Ez 8M. This positions it directly against the Haas ST-20Y in the value Y-axis lathe market.
02
Very competitive matchup. The Haas ST-20Y has a larger 57 mm bar capacity and slightly lower pricing. The Mazak offers a built-in motor spindle, BMT tooling option, MAZATROL conversational programming, and 0.0001-degree C-axis resolution. Both are proven Y-axis platforms.
03
The QTE-200MY has a larger 65 mm bar capacity, 18.5 kW spindle, and slightly more turning length. The QT-Ez 8MY has a larger 410 mm max turning diameter for chuck work. Both use SmoothEz and similar live tooling. Choose based on whether bar work or chuck work dominates your mix.
04
Yes. The Y-axis with 100 mm travel combined with C-axis indexing handles hex milling at 0.0001-degree resolution. The 3.7 kW live tool power is sufficient for hex milling on bar stock up to about 50 mm diameter in steel.
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