Mazak QT-350MY
Key Specifications
max swing
max machining length
bar capacity
chuck size
main spindle speed
main spindle power
Overview
The Mazak QT-350MY is a multi-function CNC turning center combining a high-capacity main turning spindle with a Y-axis driven tool turret, enabling complete machining of complex turned parts — including off-center milling, cross-drilling, and slotting — in a single setup. The MY designation indicates both Milling (driven tooling) and Y-axis capability, differentiating the machine from basic turning centers that lack off-center machining reach.
The QT-350MY accommodates 65 mm (2.56 in) bar stock through an A2-6 spindle with 12-inch chuck, a maximum swing of 500 mm (19.7 in), and a maximum machining length of 1,020 mm (40.2 in). This makes the 350MY one of the larger QT-series turning centers, suitable for shaft-type workpieces up to 1 m in length. The main spindle runs to 3,500 RPM with 22 kW (30 hp), providing the torque needed for aggressive turning in steel and stainless.
The driven tool turret operates at up to 5,000 RPM with 5.5 kW (7.4 hp) for milling operations. The Y-axis provides 80 mm (3.15 in) of offset travel, enabling off-center drilling, slotting on cylinder OD and face surfaces, and flat milling that would otherwise require secondary VMC operations. The 12-station turret holds both static turning tools and live milling tool holders.
The QT-350MY runs on MAZATROL SmoothAi control with conversational programming support. Pricing for new machines runs $200,000 to $280,000, reflecting the Y-axis and driven tooling premium over basic turning centers. The machine competes with the Haas ST-30Y, the Okuma LB3000 EX, and the DMG Mori CTX 450 in the mid-size Y-axis lathe segment.
Full Specifications
| Parameter | Value |
|---|---|
| Max Swing | 500 mm (19.7 in) |
| Max Machining Length | 1,020 mm (40.2 in) |
| Bar Capacity | 3" |
| Chuck Size | 10" |
| Main Spindle Speed | 3,500 RPM |
| Main Spindle Power | 22 kW (30 hp) |
| Main Spindle Torque | 700 Nm (516 ft-lb) |
| Driven Tool Speed | 5,000 RPM |
| Driven Tool Power | 5.5 kW (7.4 hp) |
| Y Axis Travel | 80 mm (3.15 in) |
| Turret Stations | 12 stations |
| Rapid Traverse X | 20 m/min (787 ipm) |
| Rapid Traverse Z | 24 m/min (945 ipm) |
| Machine Weight | 6,500 kg (14,330 lb) |
| CNC Control | MAZATROL SmoothAi CNC |
| Modelquick Turn Universal 350mybrandmazaktypecnc Lathescontrolcontact Sales Rep | Contact Sales Rep. |
| Modelquick Turn Universal 350mybrandmazaktypecnc Lathescontrol | Contact Sales Rep. |
| Model | QUICK TURN UNIVERSAL 350MY |
| Brand | MAZAK |
| Type | CNC Lathes |
| Swing274machining Length196chuck Size10bar Capacity3 | Power20 hpMax RPM3,500 RPMTurning Dia13.5"ControlCNC |
| Swing Over Bed | 27.4" |
| Machining Length | 19.6" |
| Power | 20 hp |
| Max Rpm | 3,500 RPM |
| Turning Dia | 13.5" |
| Cnc Control | CNC |
| Looking To Purchase A New Mazak Quick Turn Universal 350my | Contact Sales Rep. |
Specifications sourced from machinetools.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Y-axis capability enables true off-center milling, drilling, and slotting to any position across the part diameter -- not just center-line operations limited by the spindle axis
- 22 kW main spindle provides genuine production-level turning power for medium-to-large diameter steel and stainless workpieces up to 500 mm swing
- 1,020 mm machining length handles shaft-type parts common in automotive, oil and gas, and pump manufacturing that shorter turning centers cannot accommodate
- MAZATROL SmoothAi conversational programming allows shops to create complex turned-and-milled programs without full CAM investment for the majority of parts
Limitations
- 5,000 RPM driven tool spindle is lower than dedicated VMC spindles, limiting surface finish and material removal rates on milling operations compared to a two-machine approach
- 65 mm bar capacity is the same as entry-level turning centers; shops regularly running larger bar stock need the QT-400MY or larger machines
- $200,000-$280,000 price requires sufficient volume of parts needing both turning and milling to justify the premium over a dedicated turning center
Best For
Frequently Asked Questions
01
A standard driven-tool lathe provides live tooling for milling and drilling operations, but only on the spindle centerline -- the tool can rotate, but it can only position in X and Z. A Y-axis lathe adds a third linear axis perpendicular to the spindle (Y), enabling the tool to reach any position across the diameter. This is essential for off-center holes, asymmetric features, and slots that are not on the part centerline.
02
For most turned parts with secondary milling features, yes. The QT-350MY handles cross-drilling, slot milling, flat milling, and off-center hole patterns efficiently in the same setup as turning. For parts where milling is the primary operation and turning is secondary, a dedicated machining center is more productive. The economic breakpoint is when more than 30-40% of cycle time is milling -- at that point, a dedicated mill-turn machine like the INTEGREX often makes more sense.
03
The Y-axis provides 80 mm (3.15 in) of total travel, typically 40 mm above and 40 mm below the spindle centerline. This allows reaching any point across a 500 mm diameter workpiece, sufficient for the vast majority of cross-drilling and off-center milling applications. Parts with features requiring more than 40 mm offset from centerline on a large-diameter workpiece would approach the Y-axis limit.
04
The QT-350MY in standard configuration uses a single main spindle with tailstock. A sub-spindle variant (QT-350MSY) adds a second spindle for simultaneous back-face machining without re-chucking. If your parts require both-ends machining and you want to avoid a second setup, specify the MSY variant at time of order.
05
Both are mid-size Y-axis turning centers with similar capability profiles. The Okuma LB3000 EX MY offers Okuma's OSP control with thermal active stabilizer and typically has a slight edge in sustained accuracy over long production runs. The QT-350MY offers MAZATROL conversational programming and Mazak's broader North American dealer and service footprint. Both are competitive choices; the decision typically comes down to existing control platform and service preference.
Videos
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