Makino MAG A4
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Tool Capacity
Overview
The Makino MAG A4 is a 5-axis gantry-style machining center designed for aerospace aluminum structural parts up to approximately 4 meters in length. It occupies the entry tier of Makino's gantry MAG A series — above the largest MAG horizontal centers and below the MAG A5, A9, and A10 for progressively longer structural components. The MAG A series uses a moving-column gantry architecture that allows the workpiece to remain stationary on a fixed table, a fundamental advantage when machining large, heavy aluminum structures that would be difficult to fixture on a moving pallet.
X-axis travel is approximately 4,000 mm (157.5 in), accommodating structural parts up to roughly 3,800 mm in usable length. Y-axis travel of approximately 2,500 mm (98.4 in) and Z-axis stroke of approximately 1,000 mm (39.4 in) provide access to wide, tall aerospace components such as center wing boxes, large pressure bulkheads, and floor panel assemblies. The A-axis tilting spindle head delivers +30 to -120 degrees of rotation while the C-axis rotates continuously through 360 degrees, enabling full 5-axis contouring across the entire gantry envelope.
The spindle runs at 33,000 RPM with an HSK-A63 taper, delivering the extreme surface speeds needed to drive large-diameter aluminum-cutting tools at their optimal chip loads. At 33,000 RPM, a 63 mm face mill runs at cutting speeds exceeding 6,500 m/min, producing material removal rates that are simply not achievable on conventional HMC-style aerospace machines. Spindle power reaches approximately 80 kW (107 hp), sustaining aggressive aluminum roughing without thermal or power limitations.
The fixed-table gantry design makes chip management straightforward — chips fall directly below the cutting zone to a conveyor system without re-entering the cutting path. Rapid traverse reaches 60 m/min (2,362 ipm) on X and Y, with 50 m/min (1,969 ipm) on Z, keeping non-cutting repositioning time low across the large work zone.
The MAG A4 runs on Makino's Professional 6 (Pro 6) control with full 5-axis kinematics, thermal compensation, and NURBS interpolation for smooth surface contouring. Tool capacity is 120 tools standard. Competitors include the Forest-Line Minumil, Dufieux Industrie 5-axis profilers, and Starrag Ecospeed G in the small-to-mid gantry aerospace segment.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | ~4,000 mm (157.5 in) |
| Y-Axis Travel | ~2,500 mm (98.4 in) |
| Z-Axis Travel | ~1,000 mm (39.4 in) |
| A Axis Range | +30° to -120° (150° total, direct drive) |
| C Axis Range | 360° (continuous, direct drive) |
| Max Spindle Speed | 33,000 RPM |
| Spindle Taper | HSK-A63 |
| Spindle Motor Power | ~80 kW (107 hp) |
| Tool Capacity | 120 tools standard |
| Table Configuration | Fixed table, moving gantry column |
| Rapid Traverse Xy | 60 m/min (2,362 ipm) |
| Rapid Traverse Z | 50 m/min (1,969 ipm) |
| Chip Evacuation | Through-table chip conveyor system |
| CNC Control | Makino Professional 6 (Pro 6) |
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Specifications sourced from makino.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 33,000 RPM HSK-A63 spindle delivers extreme aluminum surface speeds for maximum material removal rates on structural aerospace parts
- 4,000 mm X-travel handles large aluminum monolithic structures — center wing boxes, large ribs, and floor beam assemblies — in a single setup
- Fixed-table gantry architecture keeps heavy workpieces stationary, eliminating the dynamic load limitations of pallet-based machines
- Moving-column design provides consistent chip evacuation with chips falling clear of the workpiece throughout the operation
- 60 m/min XY rapid traverse minimizes non-cutting repositioning time across the extended gantry travel
- Full simultaneous 5-axis capability enables complex contoured surfaces and angled features without manual repositioning
- Makino Pro 6 control with NURBS interpolation delivers smooth surface finishes on curved aerospace structural profiles
Limitations
- Price range of $2.5M-$4M requires sustained aerospace structural production volume to justify the capital investment
- Fixed-table gantry footprint is substantially larger than equivalent HMC-style machines, demanding significant facility floor space
- HSK-A63 taper at high RPM has lower torque than HSK-A100 — this machine is aluminum-optimized and not suitable for heavy titanium cutting
- Lead times for gantry aerospace machines typically run 12-18+ months, requiring significant advance program planning
- Limited availability on the used market given the specialized aerospace aerospace production role
Best For
Frequently Asked Questions
01
New MAG A4 machines typically price between $2,500,000 and $4,000,000 depending on configuration and automation level. A base machine with 33,000 RPM spindle, 120-tool ATC, and standard chip management starts around $2,500,000. Adding high-pressure coolant, pallet automation, extended tool storage, and advanced probing can push the total investment toward $4,000,000. These machines are typically acquired through direct negotiation with Makino for specific aerospace production programs.
02
The HSK-A63 taper is optimized for the high-speed, lower-torque conditions of aluminum machining. At 33,000 RPM, the centrifugal forces on tooling become significant, and the smaller HSK-A63 interface maintains better dynamic balance at extreme speeds. Aluminum cutting with appropriate tools is surface-speed limited, not torque limited — the HSK-A63 at 33,000 RPM delivers far higher surface speeds than an HSK-A100 at 16,000 RPM for aluminum applications.
03
The MAG3 and MAG.A8 are horizontal machining centers with moving pallets — the workpiece moves. The MAG A4 is a gantry machine with a fixed table — the column moves over the workpiece. This fundamental difference gives the MAG A4 superior capacity for large, heavy workpieces that would exceed pallet load limits, while the HMC machines offer faster pallet change for high-mix production. The MAG A4's 33,000 RPM spindle also delivers higher aluminum MRR than the 16,000 RPM spindles on the HMC platforms.
04
Under optimal conditions with appropriate high-feed or face mill tooling, the MAG A4's 33,000 RPM spindle can achieve aluminum material removal rates exceeding 8,000-10,000 cm3/min (488-610 in3/min) during roughing. This is roughly double the rate achievable on 16,000 RPM HMC-style machines, significantly reducing roughing cycle times for large aluminum monolithic structures.
05
Common applications include center wing box sections, large wing rib sets, wide pressure bulkheads, floor beam assemblies, keel beam sections, and large structural frames. These parts are characterized by their combination of length (up to ~3.8 meters), thin-wall features, complex pockets, and contoured surfaces that require simultaneous 5-axis access — the defining capabilities of the MAG A4.
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