Yamazaki Mazak CNC Lathes / Turning Centers

Mazak QT-COMPACT 300M

Est. $100,000 - $160,000 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 It may be a superseded or older model; the specifications below are as we last recorded them.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

X Travel

210 mm (8.27 in)

Z Travel

550 mm (21.65 in)

max turning diameter

350 mm (13.78 in)

max machining length

500 mm (19.69 in)

swing over bed

620 mm (24.41 in)

bar capacity

80 mm (3.15 in)

How much does the Mazak QT-COMPACT 300M cost?

Estimated price range

Est.$100,000 - $160,000

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

With a 10 in chuck on an A2-8 nose and 80 mm (3.15 in) of bar capacity, the Mazak QT-COMPACT 300M is listed as the big-bore member of the QT-COMPACT M sizes. Listed capacity is a 350 mm (13.78 in) maximum turning diameter and 500 mm (19.69 in) of machining length under a 620 mm (24.41 in) swing over the bed.

Mazak does not show a QT-COMPACT 300M in its current lineup, which points to an older designation. For a buyer that changes the order of work: start from the machine in front of you, and use the listed figures to know what to look for on its plate. The 4,800 kg (10,582 lb) listed weight is the number to hand to the rigger.

The bigger chuck comes with a slower spindle. The listed main spindle is 18.5 kW (25 hp) at up to 4,000 RPM, where the QT-COMPACT 200M is listed at 5,000 RPM with an 8 in chuck. No duty rating or torque accompanies the power figure, so how hard it pulls at low speed cannot be read from the table. Live tooling on the 12-station BMT turret is listed at 6,000 RPM and 5.5 kW (7.4 hp).

Travels are 210 mm (8.27 in) in X and 550 mm (21.65 in) in Z, with rapids of 24 m/min (945 ipm) and 30 m/min (1,181 ipm). The table has no Y-axis row. It names MAZATROL SmoothEz as the control.

Full Specifications

Parameter	Value
Max Turning Diameter	350 mm (13.78 in)
Max Machining Length	500 mm (19.69 in)
Swing Over Bed	620 mm (24.41 in)
Bar Capacity	80 mm (3.15 in)
X-Axis Travel	210 mm (8.27 in)
Z-Axis Travel	550 mm (21.65 in)
Main Spindle Speed	4,000 RPM
Main Spindle Power	18.5 kW (25 hp)
Main Spindle Nose	A2-8
Live Tool Speed	6,000 RPM
Live Tool Power	5.5 kW (7.4 hp)
Tool Stations	12 (BMT turret)
Turret Type	BMT live tooling
Chuck Size	10 in (A2-8)
Rapid Traverse X	24 m/min (945 ipm)
Rapid Traverse Z	30 m/min (1,181 ipm)
CNC Control	MAZATROL SmoothEz
Machine Weight	4,800 kg (10,582 lb)

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

80 mm (3.15 in) listed bar capacity through an A2-8 spindle nose
10 in chuck with a 350 mm (13.78 in) listed maximum turning diameter
Live tooling listed at 5.5 kW (7.4 hp) and 6,000 RPM
550 mm (21.65 in) of Z travel for a 500 mm (19.69 in) machining length

Limitations

Main spindle is listed at 4,000 RPM, which limits surface speed on small diameters
The 18.5 kW (25 hp) figure carries no duty rating and the table gives no torque
No Y-axis row, so milling is limited to features on the spindle centreline
Listed weight of 4,800 kg (10,582 lb) has to be allowed for in moving and foundation planning

Best For

Bar work up to 80 mm (3.15 in) in diameter Chucked parts up to 350 mm (13.78 in) turning diameter Shafts within 500 mm (19.69 in) that need cross drilling or keyways

Frequently Asked Questions

01 What bar size passes through the QT-COMPACT 300M spindle?

The listed bar capacity is 80 mm (3.15 in), through an A2-8 spindle nose with a 10 in chuck. The QT-COMPACT 200M listing passes 52 mm (2.05 in) through an A2-6 nose, so the 300M is the size to look at for larger bar.

02 Is there a Y axis on the QT-COMPACT 300M?

The listed table has X and Z travel rows only: 210 mm (8.27 in) and 550 mm (21.65 in). Live tooling is listed at 6,000 RPM and 5.5 kW (7.4 hp) on a 12-station BMT turret, so drilling and milling are possible on the centreline but not off it.

03 How heavy is the QT-COMPACT 300M?

The listed weight is 4,800 kg (10,582 lb). The QT-COMPACT 200M is listed at 3,500 kg (7,716 lb). Confirm the weight on the machine's plate before arranging transport, because this is a listed figure for a model Mazak no longer shows, not one read off the machine.

04 Can I still buy a QT-COMPACT 300M new?

Mazak's current lineup does not include a model under this name, so it is a possible older model. Anyone considering one should treat the listed figures, such as 18.5 kW (25 hp) at 4,000 RPM, as a guide and verify them from the machine's own documentation.