Stama MC 730/Plus

$750,000 - $1,200,000 Updated 2026-03-17

Key Specifications

X Travel

730 mm per station (1,460 mm combined)

Y Travel

530 mm (20.9 in)

Z Travel

430 mm (16.9 in)

Max Spindle

12,000 RPM

Spindle Taper

HSK-A63

Tool Capacity

2 × 40 (80 total)

Overview

The Stama MC 730/Plus is Stama's large-format twin-spindle vertical machining center, extending the company's signature twin-spindle productivity concept to medium-large workpiece sizes. Where the MC 326 and MC 422/Twin address small precision parts and the MC 531 family targets medium-complexity components, the MC 730/Plus is designed for larger industrial components — gearbox cases, large housings, structural castings, and complex structural brackets that require a longer X-axis travel and greater workholding capacity while still benefiting from the doubled throughput of twin-spindle simultaneous machining.

Each of the MC 730/Plus's two machining units provides 730 mm of X-axis travel with a shared Y-axis and Z-axis system, enabling complete coverage of medium-large workpieces in multi-face fixture setups. Spindle speed reaches 12,000 RPM with HSK-A63 tooling — larger than the HSK-A50 used on the smaller MC models — to provide the rigidity and torque needed for steel and cast iron in the larger part size range. Tool magazines provide 2 × 40 positions, accommodating the broader tool sets required for complex large-part families.

The MC 730/Plus supports automation integration via gantry loaders, robot cells, and twin-pallet exchange systems. For larger parts, a twin-pallet shuttle is often preferred over gantry loading — the shuttle exchanges pre-loaded pallets while machining continues, minimizing spindle downtime. Stama and Chiron Group configure automation systems for the MC 730/Plus with the same engineering rigor applied to smaller-platform machines, maintaining the discipline required to keep twin-spindle productivity cycles fully realized.

The MC 730/Plus is controlled via Siemens Sinumerik 840D sl and is built at the Schlierbach facility in Baden-Württemberg, Germany. Target markets include general engineering and contract manufacturers, automotive structural component producers, and industrial equipment manufacturers who produce large families of similar parts and need the throughput advantage of twin-spindle operation on medium-large components.

Full Specifications

Parameter	Value
Spindle Count	2 (twin independent units)
X-Axis Travel	730 mm per station (1,460 mm combined)
Y-Axis Travel	530 mm (20.9 in)
Z-Axis Travel	430 mm (16.9 in)
Max Spindle Speed	12,000 RPM
Spindle Taper	HSK-A63
Spindle Motor Power	2 × 30 kW (2 × 40 hp)
Spindle Torque Max	2 × 200 Nm (2 × 148 ft-lb)
Rapid Traverse Rate	50 m/min (1,969 ipm)
Tool Capacity	2 × 40 (80 total)
Workpiece Size Max	500 × 400 × 350 mm per station
Table Load Max	400 kg per station
Positioning Accuracy	±0.005 mm
CNC Control	Siemens Sinumerik 840D sl

Strengths & Limitations

Strengths

Extends twin-spindle doubled throughput to the 500 × 400 × 350 mm workpiece size range — enabling high-volume production of medium-large automotive and industrial components that smaller twin-spindle platforms cannot accommodate
HSK-A63 tooling and 30 kW spindles provide the rigidity and torque needed for productive steel and cast iron machining at industrial part sizes, not just aluminum
2 × 40 tool magazine supports complex large-part families with varied tool requirements across multiple operations without tool change interruptions
Pallet shuttle automation option enables overlapped load/unload with machining, maintaining twin-spindle throughput even with the longer load times associated with larger, heavier workpieces
Sinumerik 840D sl control provides full 5-axis interpolation, advanced compensation, and DNC connectivity required by automotive and aerospace production environments

Limitations

12,000 RPM spindle speed, while appropriate for steel and cast iron, is lower than the 15,000–18,000 RPM available on smaller Stama platforms — aluminum-focused shops machining smaller parts will find faster spindles on the MC 422/Twin or MC 531/Twin
The large-format twin-spindle concept requires highly uniform part families and stable tooling — job shops running many different part numbers will not realize the twin-spindle advantage consistently
Floor space and installation requirements are substantial — the twin-spindle combined X-axis travel of 1,460 mm plus automation requires careful factory layout planning and a reinforced foundation

Best For

Automotive structural component manufacturers producing transmission cases, differential housings, and engine block families in medium-to-large volumes requiring tight positional tolerances General engineering and industrial equipment manufacturers with high-volume production of large cast iron or steel housings, covers, and frames where twin throughput reduces overtime and shift costs Contract manufacturers with long-running orders for large, uniform part families — pump bodies, compressor cases, gearbox covers — where twin-spindle economics yield clear cost-per-part advantages over single-spindle equivalents Aerospace structural part producers machining medium-large aluminum or titanium fittings and brackets in production quantities where 4-axis twin-spindle coverage is sufficient

Frequently Asked Questions

01 What size parts is the MC 730/Plus designed for?

The MC 730/Plus accommodates workpieces up to 500 × 400 × 350 mm and 400 kg per station. This covers medium-large automotive and industrial components — transmission cases, large pump bodies, structural brackets, and similar parts that exceed the work envelope of the MC 531 family but do not require the very large travels of a horizontal machining center or floor-type boring mill.

02 Is the MC 730/Plus available in a 5-axis configuration?

The standard MC 730/Plus is a 4-axis machine — X, Y, Z, and C-axis spindle orientation per station, enabling full 4-axis simultaneous interpolation for complex contour milling and positioning. A 5-axis version with A-axis trunnion swivel is available on request for customers requiring simultaneous 5-axis contouring on medium-large parts, though pricing and lead time will increase accordingly.

03 How does the twin-spindle automation cycle work on large, heavy parts?

For heavier parts in the MC 730/Plus size range, Stama typically recommends a twin-pallet shuttle system over a gantry loader. The shuttle holds two pre-loaded pallets; while one pallet is machining, the operator or robot loads the second pallet outside the machine. At end-of-cycle, the shuttle exchanges the finished pallet for the loaded pallet in seconds. This eliminates the manual-load idle time that would otherwise degrade twin-spindle utilization on heavier components requiring careful setup.

04 What is the advantage of HSK-A63 over HSK-A50 tooling?

HSK-A63 provides a larger contact face and greater clamping force than HSK-A50, delivering higher rigidity for heavy cuts in steel and cast iron. For the MC 730/Plus's target applications — large cast iron and steel housings, automotive structural components — the additional rigidity of HSK-A63 reduces tool deflection, improves surface finish on facing operations, and extends tool life in demanding roughing passes. HSK-A50 is preferred for smaller, higher-speed applications where tool weight is a consideration.

05 How does the MC 730/Plus compare to a twin-pallet horizontal machining center?

A twin-pallet HMC (such as the Makino a81 with pallet changer) also provides overlapped load/unload and typically offers 4-axis capability. The MC 730/Plus provides literal twin-spindle simultaneous machining — two parts machined at once — rather than overlapped load/machine sequencing. For parts where fixturing is complex and load time is long relative to cycle time, twin-pallet HMCs can be competitive. For parts with short cycle times and high volumes, the MC 730/Plus's simultaneous twin machining provides a greater throughput advantage.