Yamazaki Mazak CNC Lathes / Turning Centers

Mazak QT-Ez 8

Est. $65,000 - $90,000 Specs verified 2026-10-02 · mazak.com Updated 2026-10-02

Image: mazak.com, Yamazaki Mazak

Key Specifications

X Travel

9 in (229 mm)

Z Travel

25 in (635 mm)

Max Spindle

6,000 rpm

Tool Capacity

12 tools

Max Turn Length

23 in (584 mm)

max swing

Ø27 in (686 mm)

How much does the Mazak QT-Ez 8 cost?

Estimated price range

Est.$65,000 - $90,000

Our best estimate for a cnc lathes / turning center in this class — not a quote from Yamazaki Mazak. Configuration moves it a long way.

Overview

The Mazak QT-Ez 8 is the 8 in chuck model in the QT-Ez range of turning centers: a 6,000 rpm spindle and a 12-tool turret over a turning envelope of Ø16 in (406 mm) by 23 in (584 mm). It shares that envelope with the QT-Ez 10, so the choice between the two comes down to chuck, speed and bar size, not to how big a part clears.

Speed is what sets it apart. The QT-Ez 10 tops out at 4,500 rpm and the QT-Ez 12 at 4,000 rpm, both well short of the 6,000 rpm here. On small diameters that difference decides whether carbide reaches its surface speed at all, so bar and small chucked parts in aluminium, brass or free-cutting steel are where this machine earns its place. The spindle motor is rated 15 kW (20 HP) (30 min. rating), the same rating the QT-Ez 10 carries, and Mazak's table gives no continuous figure.

Bar capacity is Ø2 in (51 mm). That is the figure to check first if the work is bar-fed, because the QT-Ez 10 passes Ø3 in (76 mm) through its spindle. Anything over 2 in has to be sawn into slugs and chucked on this machine. Travels are 9 in (229 mm) in X and 25 in (635 mm) in Z under a Ø27 in (686 mm) swing, and the table lists only those two axes: no Y-axis, rotary-tool or second-spindle rows appear for this model.

Mazak's QT-Ez series page lists a chip conveyor, an automatic tool eye, a mist collector and SUPERFLOW 1000 psi high-pressure coolant among the equipment for the range. It does not say which of these come with the base machine, so the quotation should name each one.

Full Specifications

Parameter	Value
Max Swing	Ø27 in (686 mm)
Max Turning Diameter	Ø16 in (406 mm)
Max Turning Length	23 in (584 mm)
Max Bar Capacity	Ø2 in (51 mm)
Chuck Size	8 in
Max Spindle Speed	6,000 rpm
Spindle Power Intermittent	15 kW (20 HP) (30 min. rating)
Tool Capacity	12 tools
X-Axis Travel	9 in (229 mm)
Z-Axis Travel	25 in (635 mm)

Specifications sourced from mazak.com — verified 2026-10-02

Strengths & Limitations

Strengths

6,000 rpm spindle, against 4,500 rpm on the QT-Ez 10 and 4,000 rpm on the QT-Ez 12
Same Ø16 in (406 mm) by 23 in (584 mm) turning envelope as the QT-Ez 10, so the smaller chuck gives up no part size
15 kW (20 HP) (30 min. rating) spindle motor on an 8 in chuck machine
12 tools in the turret and 25 in (635 mm) of Z travel for shaft-type parts within the 23 in (584 mm) turning length

Limitations

Bar capacity is Ø2 in (51 mm); the QT-Ez 10 takes Ø3 in (76 mm)
The table lists X and Z only, with no Y-axis, rotary-tool or second-spindle rows, so milled features and back-end work need another operation
Mazak gives the motor only as a 30 min. rating of 15 kW (20 HP); no continuous power or torque figure is listed
The series page does not say which listed equipment (chip conveyor, tool eye, high-pressure coolant) is standard

Best For

Bar work up to Ø2 in (51 mm) at spindle speeds to 6,000 rpm Small-diameter turning in aluminium and brass, where surface speed needs rpm Turned parts within the Ø16 in (406 mm) envelope that need no milled features Shafts within 23 in (584 mm) turning length

Frequently Asked Questions

01 How does the QT-Ez 8 differ from the QT-Ez 10?

Chuck, speed and bar size. The QT-Ez 8 has an 8 in chuck, a 6,000 rpm spindle and Ø2 in (51 mm) bar capacity. The QT-Ez 10 has a 10 in chuck, 4,500 rpm and Ø3 in (76 mm) bar capacity. Turning envelope, travels, tool count and the 15 kW (20 HP) (30 min. rating) motor are the same on both.

02 What is the largest bar the QT-Ez 8 will take?

Ø2 in (51 mm). Larger stock has to be cut into blanks and chucked, up to the maximum turning diameter of Ø16 in (406 mm). If bar work above 2 in is a regular need, the QT-Ez 10 passes Ø3 in (76 mm).

03 How much spindle power does the QT-Ez 8 have?

Mazak lists the spindle motor at 15 kW (20 HP) (30 min. rating), with a top speed of 6,000 rpm. The table gives no continuous rating and no torque figure, so for sustained heavy roughing ask Mazak for the continuous output and the torque curve.

04 Can the QT-Ez 8 do milling or off-centre drilling?

Mazak's table for the QT-Ez 8 lists X and Z travels only and has no rotary-tool, Y-axis or second-spindle rows. Within the same range, the QT-Ez 10MY lists 4 in (102 mm) of Y travel and the QT-Ez 10MSY lists a second spindle with a 6 in chuck.

05 What equipment does Mazak list for the QT-Ez series?

The series page lists an automatic tool eye, high/low chuck pressure switching, an automatic door, an extra work light, a 3-color signal tower, a chip conveyor, air hose prep, a coolant system with an additional head-side nozzle, a mist collector, SUPERFLOW 1000 psi high-pressure coolant and coolant temperature control. It does not state which are standard on the QT-Ez 8.