Studer S100
Key Specifications
axes
max workpiece length between centers
max external grinding diameter
max internal grinding bore
max workpiece weight between centers
work table swivel
Overview
The Studer S100 is a production cylindrical grinding machine from United Grinding's Studer brand, designed for high-volume internal and external cylindrical grinding of shaft-type and bore-type workpieces in automotive, bearing, and precision engineering applications. The S100 positions itself as Studer's entry into high-production cylindrical grinding, offering the Swiss precision and StuderGRIND software of the larger S series at a reduced footprint and investment level.
The S100 handles workpieces up to 650 mm (25.6 in) length between centers, with a maximum grinding diameter of 250 mm (9.84 in) for external grinding and a maximum bore diameter of 100 mm (3.94 in) for internal grinding. The swivel range of the work table enables grinding of tapered workpieces up to ±7 degrees. Maximum workpiece weight between centers is 80 kg (176 lb).
The grinding spindle is designed for both internal and external operations with rapid changeover between internal and external spindle configurations. The wheelhead swivels 0-90 degrees (or optionally ±15 degrees) to enable angular and face grinding without workpiece repositioning. The machine uses Studer's StuderGuide hydrostatic and aerostatic guideway technology on all linear axes for vibration-free motion and extended precision life.
Control is via the Studer StuderWIN interface running on a Fanuc CNC platform, with full StuderGRIND programming software for cycle creation. The S100 integrates with Studer's automated loading systems for production environments.
New Studer S100 machines are typically priced in the $300,000-$480,000 range. Used units from 2015-2022 appear in the $120,000-$250,000 range.
Full Specifications
| Parameter | Value |
|---|---|
| Axes | 4 (X, Z linear + C workhead, B wheelhead swivel) |
| Max Workpiece Length Between Centers | 650 mm (25.6 in) |
| Max External Grinding Diameter | 250 mm (9.84 in) |
| Max Internal Grinding Bore | 100 mm (3.94 in) |
| Max Workpiece Weight Between Centers | 80 kg (176 lb) |
| Work Table Swivel | ±7 degrees |
| Wheelhead Swivel | 0-90 degrees (optional ±15 degrees) |
| External Grinding Wheel | 500 x 63 mm (19.7 x 2.5 in) |
| Guideway System | StuderGuide hydrostatic/aerostatic |
| Machine Dimensions | 3,100 x 1,850 x 1,900 mm (122 x 72.8 x 74.8 in) |
| CNC Control | StuderWIN with StuderGRIND on Fanuc CNC |
Specifications sourced from machinetools.com — verified 2026-03-28
Strengths & Limitations
Strengths
- StuderGuide hydrostatic guideway system provides superior vibration damping compared to roller or ball guide systems, yielding excellent surface finish on production parts
- Combined internal and external grinding capability on a single machine reduces the number of setups required for complex shaft and bore combinations
- StuderGRIND software provides an intuitive graphical programming environment that reduces setup time for experienced cylindrical grinding operators
- Wheelhead swivel of 0-90 degrees enables angular and face grinding without unclamping and repositioning the workpiece
- Fanuc CNC platform provides a familiar control environment and robust spare parts availability for production environments
- Integrates with Studer's automated loading systems for production environments where unattended grinding is required
Limitations
- 250 mm maximum grinding diameter and 650 mm between-centers length excludes larger shaft components handled by the S41 and S141
- 4-axis configuration without full 5-axis simultaneous capability limits complex thread and profile grinding versus Studer's higher models
- Higher price than Asian cylindrical grinders — the S100 competes on precision and longevity, not on initial capital cost
- Hydrostatic guideways require consistent coolant maintenance and a controlled temperature environment to maintain their precision advantage
- Limited to ±7-degree taper grinding — steep tapers require a dedicated taper grinding setup or a more capable machine
Best For
Frequently Asked Questions
01
The S33 is Studer's universal cylindrical grinder for complex workpiece geometries with a wider angular wheelhead range and full universal capability including taper grinding, while the S100 focuses on production efficiency for internal and external cylindrical grinding of shaft and bore geometries. The S33 handles more diverse workpiece types; the S100 optimizes throughput for defined production tasks. Both use the StuderGRIND programming platform.
02
Yes. The S100 is equipped for both internal and external grinding with rapid changeover between spindle configurations. The wheelhead swivel allows the machine to engage different grinding spindles without repositioning the workpiece, making it efficient for shaft-with-bore components that require both OD and ID grinding in one clamping.
03
Yes. The S100 uses Studer's StuderGuide system, which incorporates hydrostatic and aerostatic guideway technology on the linear axes. This provides superior damping of grinding vibrations compared to rolling element guides, contributing to the excellent surface finish Studer cylindrical grinders are known for. The system requires consistent coolant supply and temperature control to operate optimally.
04
New Studer S100 machines typically price between $300,000 and $480,000 depending on configuration, wheelhead options, and automation integration. Used S100 units from 2015-2022 appear in the $120,000-$250,000 range on the secondary market. United Grinding's dealer network can provide current pricing and financing options.
Videos
Fritz Studer AG
UNITED GRINDING Group
UNITED GRINDING Group
Community Discussions
Community discussion — Studer Grinder G-Code - CNCzone
Community discussion — Looking for a Used Studer Grinder? - cnczone.com
Troubleshooting and problem-solving — Studer S 33 Problems with StuderWin - CNCzone
Community discussion — Toolgrinding / Toolgrinding Machines - Page 4 - CNCzone
Community discussion — Stock to leave for heat treat/grinding : r/Machinists - Reddit
Community discussion — Surface Grinding : r/Machinists - Reddit
Troubleshooting and problem-solving — What do you think? time for a spindle regrind? :
Pricing and buying discussion — Guys on the cylindrical grinder knocking it out of the park ...Using a lathe as a grinder? : r/Machinists - RedditAnyone experienced with u-drills able to help out? - Reddit
Links to community discussions. Summaries are editorial — visit the original thread for full context.
