Yamazaki Mazak CNC Lathes / Turning Centers

Mazak Quick Turn Nexus 450MY

$340,000 – $520,000 Updated 2026-03-17

Key Specifications

Max Spindle

2,000 RPM

Tool Capacity

12-position turret (VDI 60)

Spindle Power

37 kW (50 hp) at 25% ED; 22 kW (30 hp) continuous

Max Turn Length

1,524 mm (60 in)

max turning diameter

600 mm (23.62 in)

swing over bed

33.07"

Overview

The Mazak Quick Turn Nexus 450MY is a large-frame CNC turning center with live tooling, C-axis, and Y-axis capability, targeting shops that need to perform heavy turning and milling operations on large-diameter parts without transferring to a machining center. Combining the QTN-450-II's large-diameter turning muscle with full milling functionality, the 450MY is a done-in-one platform for oil and gas, aerospace, and heavy industrial components.

Max turning diameter is 600 mm (23.62 in) with a 21-inch chuck. The main spindle delivers 37 kW (50 hp) and 2,450 Nm of torque through an A2-11 nose, providing the heavy roughing capability needed for large stainless, alloy steel, and inconel components. The Y-axis provides ±80 mm of off-centerline travel — significantly more than the smaller QTN-250MY — enabling large-diameter parts with ports, pockets, and bolt patterns to be completed entirely on the lathe.

The 12-position turret runs live tools at up to 4,500 RPM for milling and drilling operations. High-pressure coolant through the turret is standard, ensuring effective chip evacuation on deep bores and cross-drillings in tough materials. MAZATROL SmoothG manages the turning and milling operations with integrated conversational programming and full 3D machining simulation.

The QTN-450MY competes with the Okuma LB4000 EX II MY and Doosan Puma 480 MY. Against both, the Mazak stands out for its MAZATROL control ease of use and the breadth of Mazak's factory service network. For shops that need large-diameter turning with real milling capability, the 450MY eliminates the need for a separate HMC or VMC on most part families.

Full Specifications

Parameter	Value
Max Turning Diameter	600 mm (23.62 in)
Max Turning Length	1,524 mm (60 in)
Swing Over Bed	33.07"
Max Spindle Speed	2,000 RPM
Spindle Motor Power	37 kW (50 hp) at 25% ED; 22 kW (30 hp) continuous
Spindle Torque	2,450 Nm (1,807 ft-lb) at 25% ED
Spindle Nose	A2-11
Chuck Size	18"
Bar Capacity	7.2"
Y Axis Travel	±80 mm (±3.15 in)
X Axis Travel	350 mm (13.78 in)
Z Axis Travel	1,570 mm (61.8 in)
Rapid Traverse X	25 m/min (984 ipm)
Rapid Traverse Z	30 m/min (1,181 ipm)
Milling Spindle Speed	4,500 RPM
Tool Capacity	12-position turret (VDI 60)
Machine Weight	14,500 kg (31,967 lb)
CNC Control	MAZATROL SmoothG CNC
Modelquick Turn 450my 80brandmazaktypecnc Lathescontrolcontact Sales Rep	Contact Sales Rep.
Modelquick Turn 450my 80brandmazaktypecnc Lathescontrol	Contact Sales Rep.
Model	QUICK TURN 450MY-80
Brand	MAZAK
Type	CNC Lathes
Swing3307machining Length8031 Axis3chuck Size18bar Capacity72	Power50 hpMax RPM2,000 RPMTurning Dia23.83"TailstockYesControlCNC
Machining Length	80.31"
Axis	3
Power	50 hp
Max Rpm	2,000 RPM
Turning Dia	23.83"
Tailstock	Yes
Cnc Control	CNC
Looking To Purchase A New Mazak Quick Turn 450my 80	Contact Sales Rep.

Specifications sourced from machinetools.com — verified 2026-03-28

Strengths & Limitations

Strengths

±80 mm Y-axis travel is one of the most generous in the large-diameter turning center class, handling off-center features on workpieces up to 600 mm in diameter
37 kW spindle with 2,450 Nm torque provides real heavy roughing capability in alloy steel and inconel that smaller mill-turn machines cannot match
21-inch chuck combined with Y-axis and live tooling creates a true done-in-one platform for large industrial components
High-pressure coolant through the turret standard on the -II generation improves tool life and chip breaking on difficult materials
MAZATROL SmoothG conversational programming handles complex multi-axis turning-and-milling part programs without specialized CAM software
VDI 60 tooling interface provides rigid tool clamping appropriate to the scale of cuts taken on large-diameter parts

Limitations

2,000 RPM main spindle speed limits surface footage on small-diameter features — the 450MY is optimized for large-diameter work
4,500 RPM live tool speed is adequate for most industrial milling but slower than dedicated machining center spindles for high-speed aluminum work
At 14,500 kg and $340K+ new, the 450MY requires a committed budget and proper facility planning
No sub-spindle — backworking operations require a second setup, so parts needing complex back-side machining should be evaluated against INTEGREX configurations
Milling capacity limited by live tool spindle power — for heavy face milling, a dedicated HMC is still more productive

Best For

Oil and gas manufacturers producing large valve bodies, flanges, and wellhead components with cross-drilled ports and milled features Energy sector shops turning and milling large pump housings, compressor components, and turbine adapter flanges Aerospace manufacturers producing large structural components, actuator housings, and landing gear parts in titanium and aluminum Subsea equipment manufacturers needing tight-tolerance bore-plus-milling operations on large stainless and duplex steel components Heavy industrial job shops eliminating the cost and floor space of separate large-diameter lathes and machining centers

Frequently Asked Questions

01 What does a Mazak Quick Turn Nexus 450MY cost?

New pricing ranges from approximately $340,000 to $520,000 depending on bed length, tooling package, and optional equipment including high-pressure coolant, chip conveyor, and bar feeder interface. Used 450MY machines are less common than smaller models; secondary market prices typically run $140,000–$260,000 for well-maintained machines.

02 How does the 450MY differ from the standard QTN-450-II?

The 450MY adds a Y-axis with ±80 mm of travel, a 12-position live tooling turret with 4,500 RPM milling spindle, and full C-axis contouring. The main spindle, chuck size, and turning capacity are identical. The MY variant weighs approximately 2,000 kg more due to the additional Y-axis components and live tooling head.

03 What is the Y-axis travel on the 450MY?

The Y-axis provides ±80 mm of off-centerline travel, for a total Y-axis stroke of 160 mm. This is significantly more than competing large-diameter turning centers with Y-axis in the same class and handles virtually all off-center milling requirements on parts up to 600 mm diameter.

04 Can the QTN-450MY replace a horizontal machining center for milling?

For most large-diameter parts with milled features, yes — the 450MY handles the milling so the part never has to leave the lathe chuck. However, for parts with extensive milling — large flat surfaces, deep pockets, or features requiring many tool changes — a dedicated HMC remains more productive. The 450MY works best when turning is the primary operation and milling is secondary.

05 Does the 450MY support high-pressure coolant through the turret?

Yes. The NEXUS-II generation includes high-pressure coolant through the turret as standard equipment. Coolant is delivered directly to the cutting edge on both stationary turning tools and live milling tools, improving chip management and tool life on difficult materials such as stainless steel, Inconel, and titanium.