Hardinge Kellenberger K10
Key Specifications
X Travel
Z Travel
Max Spindle
Spindle Taper
Spindle Power
Max Workpiece ⌀
Overview
The Hardinge Kellenberger K10 is a precision CNC cylindrical grinder from the K-series platform, offering a 1,000 mm center distance and 200 mm center height for workpieces up to 400 mm diameter and 1,000 mm length. As the mid-range model in the K-series, the K10 balances Kellenberger's Swiss-precision grinding heritage with a versatile work envelope suitable for a broad range of cylindrical grinding applications from precision shafts to bearing components.
The external grinding spindle delivers 7.5 kW through a water-cooled motor, driving grinding wheels of 400 x 63 mm or 500 x 80 mm at peripheral speeds up to 50 m/s. The workpiece headstock provides infinitely variable speeds from 1 to 1,000 RPM. The optional high-frequency internal grinding spindle reaches speeds up to 60,000 RPM with up to 7.5 kW power, enabling precision bore grinding up to 150 mm diameter. An automatic 1-degree indexing B-axis with 240-degree swivel range allows compound-angle grinding operations.
Axis travels include 1,150 mm on Z and 365 mm on X, with feed rates of 20,000 mm/min and 10,000 mm/min respectively. Scale resolution of 0.00001 mm (10 nanometers) on both axes delivers the sub-micron positioning required for precision cylindrical grinding. The machine supports workpieces up to 100 kg between centers with 100 Nm maximum chuck load capacity.
The K10 runs on a Fanuc 0i-F Plus CNC control with a 19-inch touchscreen and Kellenberger's BLUE Solution grinding software for simplified cycle programming. The machine weighs 4,100 kg and requires a 3.4 x 2.2 m footprint. New K10 machines price between $220,000 and $350,000. The machine competes with the Studer S33, Junker Jumat 3000, and Toyoda GL4Ai-100 in the mid-range precision cylindrical grinder segment. Specs sourced from Kellenberger published data.
Full Specifications
| Parameter | Value |
|---|---|
| Center Distance | 1,000 mm (39.4 in) |
| Center Height | 200 mm (7.9 in) |
| Max Workpiece Diameter | 400 mm (15.7 in) |
| Max Workpiece Length | 1,000 mm (39.4 in) |
| Max Workpiece Weight | 100 kg (220 lb) |
| Z-Axis Travel | 1,150 mm |
| X-Axis Travel | 365 mm |
| Axis Resolution | 0.00001 mm |
| B Axis Swivel | 240 degrees, 1-degree indexing |
| External Grinding Wheel | 400 x 63 mm or 500 x 80 mm |
| Peripheral Speed | 50 m/s |
| External Motor Power | 7.5 kW (water-cooled) |
| Workpiece Speed Range | 1 - 1,000 RPM |
| Internal Grinding Speed | Up to 60,000 RPM (optional) |
| Internal Grinding Power | 7.5 kW max |
| Internal Bore Capacity | 150 mm max |
| Chuck Load | 100 Nm |
| CNC Control | Fanuc 0i-F Plus |
| Machine Weight | 4,100 kg |
| Floor Space Required | 3.4 x 2.2 m |
| Max Spindle Speed | 60,000 min-1 |
| Spindle Motor Power | 7.5 kW |
| Spindle Taper | MT5 |
| Rapid Traverse X | 10,000 mm/min |
| Rapid Traverse Z | 20,000 mm/min |
| Max Cutting Feedrate | 20,000 mm/min |
| Positioning Accuracy | 0.4 / 0.2 μm |
| Max Turning Diameter | < 400 mm |
| Max Turning Length | 1,000 mm |
| Table Load Max | 100 kg |
| Floor Space | 3.4m x 2.2m |
| Cnc Control | FANUC 0i-F Plus |
| Electrical | 400 V / 460 V |
Specifications sourced from kellenberger.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 1,000 mm center distance accommodates a wide range of shaft, spindle, and cylindrical workpieces in a single setup
- 10-nanometer axis resolution and Swiss-precision build quality deliver sub-micron roundness on ground surfaces
- Optional internal grinding spindle up to 60,000 RPM enables combined OD/ID grinding without moving the workpiece
- Automatic B-axis with 240-degree swivel and 1-degree indexing supports compound-angle and taper grinding operations
- Fanuc 0i-F Plus with BLUE Solution software provides guided grinding cycle programming accessible to CNC operators
- Water-cooled 7.5 kW grinding motor maintains thermal stability for consistent accuracy during production runs
Limitations
- 100 kg between-centers weight limit restricts the K10 to medium-duty workpieces; heavier shafts require the K100 or K1000
- 50 m/s peripheral speed is standard but lower than high-speed grinding platforms that reach 80 m/s or higher
- Kellenberger grinders carry a Swiss-precision price premium that can be 30-50% above comparable Asian-made grinders
- B-axis indexes in 1-degree increments rather than full CNC interpolation, which limits some complex profile grinding operations
Best For
Frequently Asked Questions
01
New Kellenberger K10 machines price between $220,000 and $350,000 depending on configuration. Base machines with external grinding start near $220,000. Adding internal grinding spindle, B-axis, in-process gauging, diamond dressing systems, and automation pushes prices toward $350,000.
02
The K100 is a significant step up with multiple center distance options (600/1,000/1,700 mm), higher center height options (200/250 mm), more powerful 11.5 kW grinding motor, 90,000 RPM internal spindle capability, Fanuc 31i-B control, and full CNC B-axis with 280-degree range. The K10 is the right choice for standard OD/ID work; the K100 handles more complex and demanding applications.
03
With 10-nanometer scale resolution and Kellenberger's precision machine structure, the K10 is capable of achieving roundness below 0.5 microns on appropriate workpieces. Actual results depend on workpiece material, grinding parameters, dressing quality, and environmental conditions. For reference, the larger K100 specifies 0.4/0.2 micron roundness in fly grinding.
04
The B-axis rotates the grinding wheelhead to enable compound-angle and taper grinding without repositioning the workpiece. The 240-degree swivel range with 1-degree automatic indexing allows the operator to grind tapers, shoulders, and angled features. This is essential for multi-feature workpieces like spindle assemblies that require OD grinding, shoulder grinding, and taper grinding in a single setup.
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