Mazak QT-Ez 12M
Key Specifications
Max Spindle
Spindle Taper
Tool Capacity
Weight
Rapid Traverse
Spindle Power
Overview
The Mazak QT-Ez 12M is the milling-equipped variant of the largest QT-Ez turning center, adding live tooling and C-axis capability to the 12-inch chuck platform. The M designation enables cross-drilling, tapping, and light milling operations for shops that need basic mill-turn capability on larger diameter parts without stepping up to Quick Turn pricing.
The QT-Ez 12M runs a 305 mm (12 in) chuck with a maximum turning diameter of 343 mm (13.5 in) and a maximum turning length of 481 mm (18.94 in). Note that the milling configuration reduces the turning diameter and length compared to the base QT-Ez 12 due to turret clearance requirements. The built-in motor spindle delivers 22 kW (30 hp) at up to 3,500 RPM through an A2-8 spindle nose with 80 mm (3.15 in) bar capacity.
The 12-position turret accepts bolt-on or BMT 55 tooling with C-axis indexing resolution of 0.0001 degrees. Live tool speed reaches 6,000 RPM, providing solid capability for cross-drilling, tapping, and contouring in steel. The BMT 55 interface ensures the rigidity needed for milling operations on larger workpieces where cutting forces are higher.
MAZATROL SmoothEz on a 15-inch touchscreen handles both turning and milling programming conversationally. The SmoothEz C-axis programming interface simplifies live tooling operations for operators transitioning from 2-axis turning.
The QT-Ez 12M competes with the Haas ST-30Y, Doosan Puma 3100M, and DN Solutions Puma GT-3100 M. It delivers Mazak's motor spindle technology and MAZATROL control in a 12-inch milling-equipped lathe at competitive pricing. For shops producing larger parts with cross-holes or milled features that would otherwise require a second operation, the QT-Ez 12M consolidates the workflow. Specs sourced from Mazak Corporation published data.
Full Specifications
| Parameter | Value |
|---|---|
| Chuck Size | 12" |
| Max Turning Diameter | 343 mm (13.5 in) |
| Max Turning Length | 481 mm (18.94 in) |
| Max Spindle Speed | 3,500 RPM |
| Spindle Motor Power | 22 kW (30 hp) |
| Spindle Taper | A2-8 |
| Bar Capacity | 80 mm (3.15 in) |
| Tool Capacity | 12-position turret |
| Turret Tooling | Bolt-on or BMT 55 |
| Live Tool Speed | 6,000 RPM |
| C Axis Resolution | 0.0001 degrees |
| X Axis Travel | 220 mm (8.66 in) |
| Z Axis Travel | 596 mm (23.47 in) |
| Rapid Traverse Rate | 30 m/min X, 30 m/min Z |
| Machine Weight | 4,700 kg (10,362 lb) |
| CNC Control | MAZATROL SmoothEz |
| Max Machining Diameter | Φ13.5″ |
| Max Machining Length | 21.22″ |
Specifications sourced from mazak.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 12-inch chuck with live tooling handles larger parts with milled features in one setup
- Built-in motor spindle with 22 kW provides strong stock removal on bigger workpieces
- BMT 55 turret option delivers rigid milling for cross-drilling and tapping in steel
- 80 mm bar capacity supports production bar feeding of 3-inch stock
- 0.0001-degree C-axis resolution matches more expensive Quick Turn models
- MAZATROL SmoothEz simplifies live tooling programming on 15-inch touchscreen
Limitations
- No Y-axis limits off-center milling to C-axis interpolation only
- Milling configuration reduces max turning diameter from 410 mm to 343 mm
- Turning length drops to 481 mm with milling turret clearance requirements
- SmoothEz control lacks some advanced SmoothG features for complex programming
Best For
Frequently Asked Questions
01
New pricing starts around $95,000 and reaches $145,000 with options. The M configuration adds roughly $20,000 over the base QT-Ez 12.
02
The milling turret and live tooling mechanism require more clearance, reducing the swing over the turret from 410 mm to 343 mm.
03
The 12MY adds Y-axis for off-center milling. If your parts only need axial cross-holes and tapping, the 12M saves money. If parts need off-center features, the 12MY is worth the premium.
04
No. The Y-axis is an integral part of the machine design. If Y-axis capability might be needed, it is more cost-effective to buy the 12MY from the start.
Videos
Mazak North America
Mazak North America
The HEH Group
The HEH Group
Community Discussions
Troubleshooting and problem-solving — MazakQT-EZ12Lathe
Pricing and buying discussion — Any experience withMazakQTEZLathe series?
Community discussion — MazakSmooth Turret Alighment
Owner experience and review — My thoughts on newMazakEZmachines | Forum
Links to community discussions. Summaries are editorial — visit the original thread for full context.
