Yamazaki Mazak CNC Lathes / Turning Centers

Mazak Quick Turn Nexus 450-II

Est. $280,000 – $420,000 Possible older model Updated 2026-10-02

This model was not found in Yamazaki Mazak's current lineup when we checked on 2026-10-02 (lineup page). It may be a superseded or older model; the specifications below are as we last recorded them.

Key Specifications

Max Spindle

2,000 RPM

Tool Capacity

12-position turret

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

780 mm (30.7 in)

How much does the Mazak Quick Turn Nexus 450-II cost?

Estimated price range

Est.$280,000 – $420,000

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 Quick Turn Nexus 450-II is a large turning-only lathe built around torque: the listed spindle delivers 2,450 Nm (1,807 ft-lb) at 25% ED through a 533 mm (21 in) chuck on an A2-11 nose, at no more than 2,000 RPM. The model is not in Mazak's current lineup, so the figures here are listed figures for someone assessing an existing machine.

Power is listed at 37 kW (50 hp) at 25% ED and 22 kW (30 hp) continuous. The spread between those two numbers is the thing to understand before buying. Heavy roughing on big forgings is a long cut, not a short burst, and on long cuts the continuous 22 kW (30 hp) is what the spindle sustains. The 25% ED figures describe what it can do for an interrupted or brief heavy pass.

The listed envelope is 600 mm (23.62 in) of turning diameter by 1,524 mm (60 in) of turning length, under a 780 mm (30.7 in) swing, with 350 mm (13.78 in) of X travel and 1,570 mm (61.8 in) of Z. Bar capacity is listed at 102 mm (4 in). The turret has 12 positions and the table shows no milling, Y-axis or second-spindle row, so every operation is turning, boring, grooving or threading. Rapids are listed at 25 m/min (984 ipm) in X and 30 m/min (1,181 ipm) in Z.

At a listed 12,500 kg (27,558 lb), moving one is a rigging job that belongs in the budget. Its larger relative, the Quick Turn Nexus 550-II, is listed with 4,800 Nm (3,540 ft-lb) at 25% ED, a 610 mm (24 in) chuck, 1,500 RPM and 22,000 kg (48,502 lb), which shows where the 450-II sits: the lighter and faster of the two heavy lathes.

Full Specifications

Parameter	Value
Max Turning Diameter	600 mm (23.62 in)
Max Turning Length	1,524 mm (60 in)
Swing Over Bed	780 mm (30.7 in)
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	533 mm (21 in)
Bar Capacity	102 mm (4 in)
Tool Capacity	12-position turret
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)
Machine Weight	12,500 kg (27,558 lb)
CNC Control	MAZATROL SmoothG CNC

Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.

Strengths & Limitations

Strengths

Listed spindle torque of 2,450 Nm (1,807 ft-lb) at 25% ED for heavy turning
533 mm (21 in) chuck on an A2-11 spindle nose
Listed turning length of 1,524 mm (60 in) with 1,570 mm (61.8 in) of Z travel
Power listed with both ratings: 37 kW (50 hp) at 25% ED and 22 kW (30 hp) continuous
Listed Z rapid of 30 m/min (1,181 ipm) on a 12,500 kg (27,558 lb) machine

Limitations

Not in Mazak's current lineup, so the table cannot be set against a current model page
Spindle speed is listed at 2,000 RPM maximum, which limits surface speed on small diameters
No milling, Y-axis or second-spindle row: turning operations only, from 12 positions
Continuous power is 22 kW (30 hp); the 37 kW (50 hp) figure applies at 25% ED only
Bar capacity is listed at 102 mm (4 in), small beside a 533 mm (21 in) chuck

Best For

Heavy turning of forgings and castings up to 600 mm (23.62 in) Long shafts and rolls up to the listed 1,524 mm (60 in) Large-diameter roughing that uses 2,450 Nm (1,807 ft-lb) at 25% ED Shops with a mill elsewhere for any non-turned features

Frequently Asked Questions

01 Is the Quick Turn Nexus 450-II still in Mazak's range?

No, it is not in Mazak's current lineup. The Quick Turn 450MY in the present range has an 18 in chuck, a 2,000 rpm spindle and Ø24 in (610 mm) of turning diameter, and adds milling and a Y-axis that the listed Nexus 450-II table does not show.

02 How much torque and power does the spindle have?

The table lists 2,450 Nm (1,807 ft-lb) of torque at 25% ED, and power of 37 kW (50 hp) at 25% ED or 22 kW (30 hp) continuous, with a 2,000 RPM maximum. Use the continuous figure for long roughing passes and the 25% ED figures for short heavy cuts.

03 How does it compare with the Quick Turn Nexus 550-II?

The Quick Turn Nexus 550-II is the bigger machine: 830 mm (32.68 in) of turning diameter, 1,800 mm (70.87 in) of turning length, 4,800 Nm (3,540 ft-lb) at 25% ED, 1,500 RPM and 22,000 kg (48,502 lb). The 450-II is listed at 600 mm (23.62 in), 1,524 mm (60 in), 2,450 Nm (1,807 ft-lb) at 25% ED, 2,000 RPM and 12,500 kg (27,558 lb).

04 Can it mill or drill off-centre?

Not according to the listed table, which has a turret of 12 positions and no milling spindle or Y-axis row. The Quick Turn Nexus 450MY is the listed variant with a milling spindle of 4,500 RPM and a Y-axis of ±80 mm (±3.15 in).

05 What should a buyer verify on an existing machine?

The chuck actually fitted, since the table lists 533 mm (21 in), and the spindle bore against the listed 102 mm (4 in) bar capacity. Also confirm the control, listed as MAZATROL SmoothG CNC, and plan the move around the listed 12,500 kg (27,558 lb).