Stama MC 531/Mill-Turn
This model was not found in Stama's current lineup when we checked on 2026-10-03 . It may be a superseded or older model; the specifications below are as we last recorded them.
Key Specifications
X Travel
Y Travel
Z Travel
Spindle Taper
Tool Capacity
Rapid Traverse
How much does the Stama MC 531/Mill-Turn cost?
Estimated price range
Our best estimate for a mill-turn / multi-tasking machine in this class — not a quote from Stama. Configuration moves it a long way.
Overview
The Stama MC 531/Mill-Turn is listed as a twin-unit machine that mills and turns in one setup: two HSK-A50 spindles of 22 kW (29.5 hp) each that run to 18,000 RPM in milling mode, and a turning mode limited to 1,200 RPM with 180 Nm (133 ft-lb) at the chuck on each side. Stama's current lineup does not include this model. The table is unconfirmed by the maker, so these are the listed figures.
Each station has 530 mm of X, giving 1,060 mm combined, with 430 mm (16.9 in) of Y and 380 mm (15 in) of Z. Three rotary motions are listed: an A swivel of -120° / +30° on the trunnion and chucking unit, a B tool tilt of ±90° at the mill-turn head, and a C axis with 360° continuous rotation for turning interpolation. The maximum workpiece is 300 mm diameter × 400 mm length per station.
The turning figures set the scope. At 1,200 RPM a part near the 300 mm limit reaches a useful surface speed, but small diameters will cut slowly. This is turning as a supplement to milling on chucked, flanged or housing-type parts, not bar turning.
Compared with the MC 531/Twin, which is listed with the same travels and 18,000 RPM spindles but 36 tools per unit, the Mill-Turn carries 40 tools per unit, 80 in total, and adds the B tool tilt and the turning mode. Rapids are 60 m/min (2,362 ipm). No table load, weight or accuracy figure is listed.
Full Specifications
| Parameter | Value |
|---|---|
| Spindle Count | 2 (twin mill-turn units) |
| X-Axis Travel | 530 mm per station (1,060 mm combined) |
| Y-Axis Travel | 430 mm (16.9 in) |
| Z-Axis Travel | 380 mm (15 in) |
| A Axis Swivel | -120° / +30° (trunnion + chucking) |
| B Axis Tool Tilt | ±90° (mill-turn head) |
| C Axis Spindle | 360° continuous (turning interpolation) |
| Spindle Speed Milling | 18,000 RPM (milling mode) |
| Spindle Speed Turning | 1,200 RPM max (turning mode) |
| Spindle Taper | HSK-A50 |
| Spindle Motor Power | 2 × 22 kW (2 × 29.5 hp) |
| Turning Torque | 2 × 180 Nm at chuck (2 × 133 ft-lb) |
| Rapid Traverse Rate | 60 m/min (2,362 ipm) |
| Tool Capacity | 2 × 40 (80 total) |
| Workpiece Size Max | 300 mm diameter × 400 mm length per station |
| CNC Control | Siemens Sinumerik 840D sl |
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
- Milling at 18,000 RPM and turning at up to 1,200 RPM on the same station, with 180 Nm (133 ft-lb) at each chuck
- Two units of 22 kW (29.5 hp) each work two parts at once
- A swivel of -120° / +30°, B tool tilt of ±90° and a continuous 360° C axis
- 40 tools per unit, 80 in total
- Rapid traverse of 60 m/min (2,362 ipm)
Limitations
- Turning mode is capped at 1,200 RPM, too slow for efficient turning of small diameters
- Workpieces are limited to 300 mm diameter × 400 mm length per station
- HSK-A50 restricts tool size compared with a larger taper
- The table lists no accuracy, table load or machine weight
Best For
Frequently Asked Questions
01
The listed figures give a turning mode of up to 1,200 RPM with 180 Nm (133 ft-lb) at the chuck on each of the two units, and a C axis with 360° continuous rotation. Milling mode runs to 18,000 RPM. The turning speed is low, so it suits larger diameters within the 300 mm workpiece limit.
02
X travel is 530 mm per station, 1,060 mm combined, with 430 mm (16.9 in) in Y and 380 mm (15 in) in Z. The maximum workpiece is listed as 300 mm diameter × 400 mm length per station.
03
Both are listed with the same X, Y and Z travels, HSK-A50 spindles and 18,000 RPM. The Mill-Turn adds a turning mode of up to 1,200 RPM and a B tool tilt of ±90°, and carries 40 tools per unit where the MC 531/Twin is listed with 36.
04
Tool capacity is listed as 2 × 40, which is 80 in total across the two units. The spindle taper is HSK-A50. The table does not give maximum tool diameter or length, so check those against the magazine of the machine on offer.
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