CNC Machine Tool >> Grinder >> Studer S21
The Studer S21 is a compact CNC universal cylindrical grinder designed for precise OD grinding, with options for ID and face grinding. Its Granitan S103 mineral-cast base and universal swiveling wheelhead provide excellent rigidity, damping and thermal stability in a small footprint.
With approximately 125 mm center height and 400 mm or 800 mm distance between centers depending on configuration, the Studer S21 is well-suited for shaft-type workpieces, tool components and small precision parts where tight tolerances and high surface quality are required.
Depending on the machine year and configuration, used Studer S21 grinders may be equipped with different wheelhead combinations, internal grinding spindles, C-axis workhead for form or thread grinding, and automation interfaces for loaders and in-process gauging.
| Specification | Details |
|---|---|
| Model | Studer S21 |
| Type | CNC universal cylindrical grinder (OD with optional ID) |
| Center Height | 125 mm (approx. 4.9 in) |
| Distance Between Centers | 400 mm or 800 mm (approx. 15.7 in or 31.5 in), depending on configuration |
| Max Workpiece Length Between Centers | Up to approx. 400 mm or 800 mm between centers |
| Max Workpiece Length Including Clamping | Typically around 430 mm or 830 mm, depending on version |
| Max Workpiece Diameter | Approx. 249–250 mm swing over table |
| Max Workpiece Weight Between Centers | Approx. 60–80 kg (132–176 lb), depending on equipment |
| X-Axis Travel (Radial) | Approx. 160 mm |
| Z-Axis Travel (Longitudinal) | Approx. 400 mm or 800 mm, corresponding to center distance |
| Axes Configuration | CNC-controlled X and Z linear axes; universal versions with swiveling B-axis wheelhead and optional C-axis workhead |
| Grinding Wheel Diameter (External) | Typically up to 500 mm |
| Grinding Wheel Width (External) | Commonly up to approx. 63 mm |
| Grinding Wheel Peripheral Speed | Up to approx. 50 m/s as standard; higher-speed options available on some configurations |
| Wheelhead Spindle Power | Approx. 7.5 kW continuous (S1) with higher peak power depending on configuration |
| Wheelhead Configuration | Universal wheelhead with one or two external wheels and optional internal grinding spindle; B-axis swivel |
| Workhead | Between-centers headstock with live and dead center capability; optional C-axis for form and thread grinding |
| Tailstock | Manual tailstock with Morse taper center and fine quill adjustment |
| Machine Base | Granitan S103 mineral-cast base for high rigidity and thermal stability |
| Approximate Machine Weight | Roughly 4,000–5,500 kg depending on center distance and equipment |
| Control System | Fanuc-based Studer CNC control (generation depends on machine year) |
| Dressing | CNC-controlled dressing with fixed or swiveling dressing units and automatic compensation |
| Automation Preparation | Machine and control prepared for external loaders, part handling and in-process measuring options |
| Notes | Specifications can vary by machine year and configuration. Verify exact values from the specific machine documentation and nameplate. |
Sell a Studer S21 Grinder
Studer Grinder Models
Studer S21 CNC Grinder FAQ
The Studer S21 is a compact CNC universal cylindrical grinder designed for precise OD grinding, with options for ID and face grinding. It uses a universal swiveling wheelhead, Granitan S103 base and Fanuc-based CNC control to deliver stable, high-accuracy grinding performance.
Typical Studer S21 machines offer about 125 mm center height and 400 mm or 800 mm distance between centers, allowing parts up to roughly 400 mm or 800 mm long between centers, with diameters around 249–250 mm and workpiece weights up to roughly 60–80 kg, depending on configuration.
Common S21 features include a Granitan S103 base, CNC-controlled X and Z axes, universal swiveling wheelhead with one or two external wheels and optional internal spindle, Fanuc-based CNC control with Studer operating software, and options such as C-axis workhead, flexible dressing units and loader interfaces.
Yes. If you have a Studer S21 or other Studer CNC cylindrical grinder to sell, use the Free Machine Appraisal form on this page or our Sell Machinery form to request a no-obligation appraisal.
Contact JS Peters Machinery Sales today to discuss your equipment needs.