Yamazaki Mazak CNC Lathes / Turning Centers

Mazak QT-Ez 8MY

Est. $95,000 - $140,000 Specs verified 2026-10-02 · mazak.com Updated 2026-10-02

Image: mazak.com, Yamazaki Mazak

Key Specifications

X Travel

9 in (229 mm)

Y Travel

4 in (102 mm)

Z Travel

24 in (610 mm)

Max Spindle

6,000 rpm

Tool Capacity

12 tools

Max Turn Length

22 in (559 mm)

How much does the Mazak QT-Ez 8MY cost?

Estimated price range

Est.$95,000 - $140,000

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 8MY adds a Y axis to the 8 in chuck QT-Ez: 4 in (102 mm) of Y travel alongside 9 in (229 mm) of X and 24 in (610 mm) of Z. The spindle runs to 6,000 rpm, the maximum turning diameter is Ø14 in (356 mm) and the maximum turning length is 22 in (559 mm).

A Y axis lets a tool move across the spindle centreline instead of only toward it. Flats, keyways and cross holes that sit off centre can then be cut directly, where a lathe without Y has to approximate them by turning the part under the tool. With 4 in (102 mm) of total stroke the reach either side of centre is modest. That fits features on bar and small chucked parts, which is also what the Ø2 in (51 mm) bar capacity and the 8 in chuck point to.

Two things are missing from Mazak's table for this model. There are no rotary-tool rows, so the speed and power available for milling have to be requested. And the spindle motor row reads 15 kW (20 HP) under a short-time rating label, where the QT-Ez 8M and QT-Ez 8MSY tables give the same 15 kW (20 HP) as a 30 min. rating. Either way it is not a continuous figure.

Against its neighbours, the QT-Ez 10MY has the same Y, X and Z travels with a 20 in (508 mm) maximum turning length and Ø3 in (76 mm) of bar capacity. The QT-Ez 8MSY keeps this machine's figures and adds a second spindle with a 5 in chuck. Swing is Ø27 in (686 mm) and the turret holds 12 tools.

Full Specifications

Parameter	Value
Max Swing	Ø27 in (686 mm)
Max Turning Diameter	Ø14 in (356 mm)
Max Turning Length	22 in (559 mm)
Max Bar Capacity	Ø2 in (51 mm)
Chuck Size	8 in
Max Spindle Speed	6,000 rpm
Spindle Motor 4 Min Rating	15 kW (20 HP) (4 min. rating)
Tool Capacity	12 tools
X-Axis Travel	9 in (229 mm)
Y-Axis Travel	4 in (102 mm)
Z-Axis Travel	24 in (610 mm)

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

Strengths & Limitations

Strengths

4 in (102 mm) of Y travel for off-centre flats, slots and cross holes
6,000 rpm spindle on an 8 in chuck
22 in (559 mm) maximum turning length, against 20 in (508 mm) on the QT-Ez 10MY
Ø14 in (356 mm) maximum turning diameter with 9 in (229 mm) of X travel

Limitations

No rotary-tool speed, power or torque rows in the table, so milling capability cannot be judged from the published figures
The 15 kW (20 HP) spindle motor figure is a short-time rating; no continuous power or torque is given
Ø2 in (51 mm) bar capacity, where the QT-Ez 10MY passes Ø3 in (76 mm)
No second spindle in the table; back-side work needs a second setup, or the QT-Ez 8MSY with its 5 in chuck second spindle

Best For

Turned parts with off-centre features inside 4 in (102 mm) of Y Bar work up to Ø2 in (51 mm) at up to 6,000 rpm Shafts up to the 22 in (559 mm) maximum turning length Single-setup parts that fit a 12-tool turret

Frequently Asked Questions

01 How much Y-axis travel does the QT-Ez 8MY have?

4 in (102 mm). It works with 9 in (229 mm) of X travel and 24 in (610 mm) of Z travel. The table gives the Y figure as a total, without the split either side of the spindle centreline, so ask for that split if a part has a feature well off centre.

02 What is the spindle rating of the QT-Ez 8MY?

The spindle runs to 6,000 rpm and the motor row lists 15 kW (20 HP) as a short-time rating. No continuous power and no torque figure appear in the table. Treat 15 kW (20 HP) as the ceiling for short heavy cuts, and ask Mazak for the continuous rating before sizing long roughing passes.

03 Does the table give milling spindle figures?

No. Mazak's table for the QT-Ez 8MY has the Y-axis travel row but no rotary-tool speed, power or torque rows. Anyone planning milling or cross drilling on this machine should get those figures, and the size limits for driven tools, from Mazak before committing work to it.

04 QT-Ez 8MY or QT-Ez 10MY?

The QT-Ez 10MY lists the same 4 in (102 mm) of Y, 9 in (229 mm) of X, 24 in (610 mm) of Z and Ø14 in (356 mm) maximum turning diameter, with Ø3 in (76 mm) bar capacity and a 20 in (508 mm) maximum turning length. The 8MY has an 8 in chuck, Ø2 in (51 mm) bar capacity, 22 in (559 mm) of turning length and 6,000 rpm.