Studer S151
Key Specifications
axes
max workpiece length between centers
max swing diameter
max internal bore diameter
max workpiece weight between centers
wheelhead configuration
Overview
The Studer S151 is Studer's extra-large universal cylindrical grinding machine, engineered for the grinding of very long shafts, heavy workpieces, and large-diameter components that exceed the envelope of all other Studer universal grinders. It serves the most demanding segments of aerospace, energy, defense, and heavy machinery manufacturing where component size and mass push beyond what any mid-range cylindrical grinder can accommodate.
The S151 accommodates workpieces up to 1,600 mm (63 in) between centers, with a maximum swing diameter of 450 mm (17.7 in) and a maximum workpiece weight between centers of 500 kg (1,102 lb). For chucked internal grinding, bore diameters up to 400 mm (15.7 in) can be ground. The multi-spindle wheelhead configuration supports both external and internal grinding in a single setup, with a wheelhead swivel range of 0-90 degrees.
The external grinding spindle accepts wheels up to 900 x 100 mm (35.4 x 3.94 in), the largest in Studer's lineup, enabling maximum face width grinding for wide-shouldered shafts and large-diameter cylindrical forms. The Granitan mineral casting base spans the full machine length with multiple support ribs to maintain geometric accuracy despite the extraordinary workpiece loads. StuderGuide hydrostatic guideways on all linear axes provide vibration isolation essential at this workpiece size.
StuderGRIND software handles the full complexity of long-shaft programs including multiple-diameter sequences, undercuts, runout profiles, tapers, and coordinated OD/ID operations. In-process gauging is standard at this machine level, with automatic compensation keeping dimensional output tight across multi-hour grinding programs.
New Studer S151 machines are typically priced in the $700,000-$1,100,000 range. Used units are extremely rare.
Full Specifications
| Parameter | Value |
|---|---|
| Axes | 5 (X, Z linear + C workhead, B wheelhead swivel, optional Y) |
| Max Workpiece Length Between Centers | 1,600 mm (63 in) |
| Max Swing Diameter | 450 mm (17.7 in) |
| Max Internal Bore Diameter | 400 mm (15.7 in) |
| Max Workpiece Weight Between Centers | 500 kg (1,102 lb) |
| Wheelhead Configuration | Multi-spindle: external + internal |
| Wheelhead Swivel | 0-90 degrees |
| External Grinding Wheel | 900 x 100 mm (35.4 x 3.94 in) |
| Guideway System | StuderGuide hydrostatic/aerostatic |
| Base Material | Granitan mineral casting |
| Machine Dimensions | 7,500 x 2,600 x 2,300 mm (295 x 102.4 x 90.6 in) |
| CNC Control | StuderWIN with StuderGRIND on Fanuc CNC |
| Manufacturer | Studer |
| Model | favoritCNC |
| Power Requirement | 3 kW |
| Grinding Length | 70 mm |
Specifications sourced from machinio.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 1,600 mm between-centers capacity grinds shaft components up to 63 inches long in a single setup — essential for turbine rotors, large screws, and aerospace structural shafts
- 500 kg workpiece weight capacity and heavy Granitan base make the S151 one of the few machines that can grind very heavy shafts without compromising geometric accuracy
- 900 mm external grinding wheel face width enables single-pass cylindrical grinding over wide shoulders and large-diameter spans without step-over marks
- Combined OD and ID in one setup maintains concentricity to machine accuracy between external diameters and internal bores — impossible to match with rechucking
- StuderGRIND handles multi-hour complex programs with automatic in-process gauging compensation, maintaining tight tolerances across the full shaft length
- Full United Grinding service and applications support for this specialized machine, with Swiss engineering backing for complex setup and process development
Limitations
- Machine length of 7,500 mm requires a substantial floor area — most shops will need to dedicate a specific bay to the S151
- 500 kg workpiece requires overhead crane and significant rigging infrastructure for workpiece loading — operator safety planning is essential
- Price of $700,000-$1,100,000 new is near the ceiling for cylindrical grinding machines — justification requires high-value long-shaft components or government/defense work
- Long setup times for complex multi-diameter programs mean the machine is not suited for short-run job shop grinding at this size
- Granitan base foundation requirements are demanding — site preparation cost is significant and must be factored into the total acquisition cost
- Extremely thin used market — when this machine type is needed, a new purchase is often the only realistic path
Best For
Frequently Asked Questions
01
The S151 grinds workpieces up to 1,600 mm (63 inches) between centers, with a maximum swing diameter of 450 mm (17.7 in) and a maximum weight of 500 kg (1,102 lb). For internal grinding in the chuck configuration, bores up to 400 mm diameter can be ground. This makes the S151 the largest in Studer's universal cylindrical grinding lineup.
02
The S151 extends the S141's capabilities in every dimension: longer between-centers capacity (1,600 mm vs. 1,000 mm), higher workpiece weight (500 kg vs. 250 kg), larger swing diameter (450 mm vs. 400 mm), and a wider external grinding wheel (900 mm vs. 750 mm face). Both machines offer multi-spindle OD/ID capability, but the S151 is built for the largest shaft components in high-value industries where the S141 reaches its limits.
03
The S151's Granitan base and 500 kg workpiece capacity require a reinforced concrete foundation designed specifically for the machine's weight and dynamic loads during grinding. United Grinding provides detailed foundation drawings during the purchase process. Typical foundations are 400-600 mm thick with vibration isolation pads. Site preparation is a significant line item in any S151 installation budget.
04
New Studer S151 machines are typically priced between $700,000 and $1,100,000 depending on wheelhead configuration, spindle options, in-process gauging, and automation. This is among the highest prices in the cylindrical grinding category and reflects the machine's specialized construction for very large, high-value workpieces. Contact United Grinding North America for a detailed quotation based on your specific requirements.
Videos
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