QT-Ez 12

Manufactured in Kentucky, the QT-Ez 12 CNC turning center is designed to bring reliability and innovation to machine shops, even those limited on floor space because of the compact footprint. This powerhouse boasts a 12″ chuck and an integral-motor spindle, making it versatile enough to handle a comprehensive range of materials and industries. Mazak QT-Ez CNC turning solutions are also automation-ready for lights-out production, and they integrate effortlessly with bar feeders and robots.

QT-Ez 12 Features:

Powerful and reliable integral motor headstock designs.
Hybrid MX Roller Guide System improves rigidity, accuracy and reliability.
Pre-tensioned ball screw systems with support at each end.
Tailstock options include a manual position with hydraulic quill or servo positioning capability.
Seamless integration of bar feeders and robots for unattended operations.

Model	QT-Ez 12, QT-Ez 12M, QT-Ez 12MSY, QT-Ez 12MY
Chuck Size	12"
Max Workpiece Diameter	16.13"
Max Machining Length	22.83"

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Description

Programmable Precision for Demanding CNC Applications

The Mazak QT-Ez 12 is a high-performance, affordable horizontal machining center designed to deliver reliable results for a wide range of CNC applications. Equipped with the Mazatrol SmoothEz CNC system, it supports both Mazatrol conversational programming and EIA/ISO formats for flexible operations. In addition, Quick Mazatrol speeds up part-program creation, while Mazatrol Twins enables offline programming to maximize spindle utilization. As a result, shops can program and run parts simultaneously, reducing downtime and improving efficiency.

Engineered for Precision and Endurance

Built for precision engineering, the QT-Ez 12 features an integral motor headstock and MX Hybrid Roller Guide System that ensure accuracy during demanding cuts. In addition, pre-tensioned and fully supported ball screws maintain smooth axis movement across long production runs. Its robust design and Y-axis capability make it suitable for complex part geometries that require tight tolerances, and it can handle high-mix production while maintaining consistent part quality.

Flexible Solutions for Growing Machine Shops

The QT-Ez 12 adapts easily to high-volume production or custom component work. In addition, its user-friendly interface shortens setup time and keeps machines running at peak capacity. This machining center also supports automation solutions such as robotic loaders and bar feeders for light out manufacturing. The QT-Ez 12 delivers a powerful combination of control, durability, and flexibility—making it a smart investment for manufacturers seeking to optimize throughput and quality.

QT-Ez 12MY Demo

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Additional Information

Model	QT-Ez 12, QT-Ez 12M, QT-Ez 12MSY, QT-Ez 12MY
Chuck Size	12"
Max Workpiece Diameter	16.13"
Max Machining Length	22.83"

Specifications

Qt-Ez 12

Universal	Universal type	20
Capacity	Max. swing	Φ27 “
	Max. machining diameter	Φ16 “
	Max. machining length	21 “
	Bar work capacity	Φ3 “
Spindle	Chuck size	12 “
	Max. spindle speed	4000 rpm
	Spindle motor (30 min. rating)	22 kW (30 HP)
Turret	Tool storage capacity	12
Travel	X-axis	9 “
Travel	Z- axis	25 “

Qt-Ez 12M

Universal	Universal type	20
Capacity	Max. swing	Φ27 “
	Max. machining diameter	Φ14 “
	Max. machining length	19 “
	Bar work capacity	Φ3 “
Spindle	Chuck size	12 “
	Max. spindle speed	3300 rpm
	Spindle motor (30 min. rating)	22 kW (30 HP)
Turret	Tool storage capacity	12
Travel	X-axis	9 “
Travel	Z- axis	24 “

Qt-Ez 12MY

Universal	Universal type	20
Capacity	Max. swing	Φ27 “
	Max. machining diameter	Φ14 “
	Max. machining length	19 “
	Bar work capacity	Φ3 “
Spindle	Chuck size	12 “
	Max. spindle speed	3300 rpm
	Spindle motor (30 min. rating)	22 kW (30 HP)
Travel	X-axis	9 “
	Y-axis	4 “
	Z- axis	24 “

Qt-Ez 12Msy

Capacity	Max. swing	Φ695 mm
	Max. machining diameter	Φ343 mm
	Max. machining length	554 mm
	Bar work capacity	Φ76 mm
Spindle	Chuck size	10 “
	Max. spindle speed	4200 min^-1
	Spindle motor (30 min. rating)	15 kW (20 HP)
Second spindle	Chuck size	6 “
	Max. spindle speed	6000 min^-1
	Spindle motor (30 min. rating)	8 kW (10 HP)
Travel	X-axis	215 mm
	Y-axis	100 mm
	Z- axis	605 mm
	W-axis (Second spindle)	585 mm

Mazak QT-Ez 12 Capabilities, Applications & Regional Support

The Mazak QT-Ez 12 is a two-axis CNC turning center for larger shafts, flanges, sleeves, and chucking components. Its configuration centers on a 12-inch-class chucking range, rigid slant-bed construction, and SmoothEz control, giving manufacturers a defined platform for parts whose critical features depend on controlled access, stable workholding, and repeatable datum management. A.W. Miller Technical Sales supports machine selection, process development, installation, training, and factory-certified service throughout New York, Pennsylvania, Maryland, Delaware, Southern New Jersey, and Quebec. A.W. Miller Technical Sales is an authorized Mazak distributor serving manufacturers throughout New York, Pennsylvania, Maryland, Delaware, Southern New Jersey, and Quebec, with applications engineering, installation, training, and factory-certified service.

The QT-Ez 12 provides the largest standard chucking capacity in the QT-Ez group for work that does not require a milling spindle or Y-axis. Machine selection should account for the complete workpiece and fixture envelope, material, spindle load, required tool reach, magazine or turret demand, probing, chip control, and automation plan. Published travels, capacities, spindle ratings, rotary ranges, tool limits, and maximum loads must be checked against the exact machine configuration and part process before purchase.

Applications

Parts and processes commonly evaluated for the Mazak QT-Ez 12 include:

large flanges and hubs
pump and valve parts
industrial sleeves
medium-length shafts

Why Manufacturers Choose the Mazak QT-Ez 12

Larger-Chuck Turning

The workholding range supports larger blanks and bar diameters than the QT-Ez 8 and 10.

Direct Turning Workflow

Facing, OD and ID turning, grooving, threading, and cutoff operations are organized around a simple two-axis process.

Spindle, Chuck, and Bar Capacity

Nominal chuck size is only the starting point. The application review should also confirm spindle bore, bar diameter, jaw stroke, grip length, part mass, stick-out, and the support required for the finished workpiece.

Turret and Tooling Layout

OD tools, boring bars, drills, grooving tools, and threading tools must be arranged for clearance and efficient indexing. Coolant delivery, chip direction, tool life, and the number of stations required should be established from the complete part family.

What makes the QT-Ez 12 different from a conventional single-process machine?

Which part features benefit most from the QT-Ez 12?

Is the QT-Ez 12 intended only for high-volume production?

What inspection strategy works with the QT-Ez 12?

How should tooling be planned for the QT-Ez 12?

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