HSK-C 50 Precision Grinding Wheel Arbor
The HSK-C 50 Precision Grinding Wheel Arbor is a specially engineered tool holder designed for mounting precision grinding wheels on CNC tool and cutter grinding machines. It incorporates a V-groove feature conforming to the HSK-E 50 interface standard, allowing it to be used in machines equipped with the HSK-E 50 spindle drive system while providing the manual clamping characteristics of the HSK-C form.
The HSK-C form is a hollow taper shank interface defined under DIN 69893, designed specifically for manual tool changes and grinding applications where high accuracy, stable clamping, and minimal run-out are essential. The combination of HSK-C 50 geometry with an HSK-E 50 compatible V-groove makes this arbor a versatile solution for precision tool grinding setups that demand both accurate wheel positioning and reliable spindle engagement.
Engineering Highlights
- Interface Standard: HSK-C 50 per DIN 69893, with V-groove as per HSK-E 50 for dual compatibility.
- Clamping System: Hollow taper simultaneous taper and face contact for high rigidity and repeatability.
- Run-Out Accuracy: Precision-ground surfaces ensure minimal run-out for consistent wheel performance.
- Application: Designed for precision CNC tool and cutter grinding machines using HSK-E 50 spindles.
- Surface Hardness: Hardened and precision-ground functional surfaces for long service life and dimensional stability.
Key Features
- Simultaneous taper and flange face contact provides high clamping rigidity and consistent axial positioning.
- V-groove on the shank conforms to HSK-E 50 specification, ensuring compatibility with HSK-E 50 spindle drive systems.
- Precision-ground taper surfaces support minimal run-out, which is critical for achieving accurate wheel geometry and ground part quality.
- Hard and wear-resistant functional surfaces extend operational life even under repeated clamping cycles.
- Compact and lightweight hollow taper design reduces overhang effects and supports stable high-speed operation.
Typical Applications
This arbor is specifically intended for use on CNC tool and cutter grinding machines that feature HSK-E 50 spindle interfaces, where the V-groove provides the necessary drive engagement. It is well suited for mounting CBN, diamond, aluminium oxide, and silicon carbide grinding wheels used in precision tool grinding operations.
Typical applications include grinding of cutting tools such as end mills, drills, taps, reamers, and form cutters on machines from manufacturers such as REINECKER, Rollomatic, Kellenberger, ANCA, and similar CNC grinding platforms that support HSK-E 50 or compatible interfaces.
Technical Specifications
| Parameter | Specification / Value | Engineering Notes |
|---|---|---|
| Interface Standard | HSK-C 50, DIN 69893 | Manual clamping form of the HSK system; simultaneous taper and face contact for high rigidity. |
| V-Groove Feature | As per HSK-E 50 specification | Enables drive key engagement and compatibility with HSK-E 50 spindle systems found on CNC tool grinding machines. |
| Taper Bore (d2) | 38.009 mm | Precision-ground internal taper bore for accurate seating and repeatable positioning within the spindle. |
| Nominal Shank Size | HSK 50 | Corresponds to the DIN 69893 nominal size designation for the HSK-C and HSK-E 50 interface. |
| Clamping Principle | Simultaneous taper and face contact | Provides superior axial stiffness, radial accuracy, and repeatability compared to conventional steep taper systems. |
| Run-Out Accuracy | Precision-ground to high accuracy | Low run-out is critical for grinding wheel mounting; directly affects wheel balance, surface finish quality, and tool geometry. |
| Material & Hardness | Alloy steel, surface hardened | Hardened and precision-ground functional surfaces ensure dimensional stability and resistance to wear over repeated clamping cycles. |
| Balancing | Balanced to suit grinding speeds | The arbor and mounted wheel assembly should be balanced as a unit to the required grade (typically G 2.5 or better) before operation. |
