HSK-A tool holder

SKfor machining

Introduction
The HSKA-SK tool holder combines the lightweight HSK-A interface with an SK collet selected for torque transmission. Compared with other collet types listed in the catalogue, the SK configuration delivers approximately 1.5× higher clamping torque and accepts h7 tools from 1–25 mm. The holder supports internal coolant supply when configured and is designed for machining operations that require increased torque transfer and secure clamping.

Key features

• Clamping torque: SK collet provides ~1.5× higher clamping torque versus other listed collet types.
• Tool range: accepts h7 tools from 1–25 mm.
• Dynamic balancing grade: ≤ G1.
• Tool holder run-out accuracy: ≤ 2 μm.
• Combined run-out accuracy: ≤ 5 μm.
• Internal coolant provision: supported (center-through/internal coolant when configured).

Applications

• Milling and drilling operations where higher clamping force and torque transmission are required.

Technical specifications

• Model: HSKA-SK
• Interface: HSK-A with SK collet configuration.
• Collet type: SK (standard SK family geometry).
• Clamping torque increase: ~1.5× compared to other collet types listed.
• Acceptable tool diameter (h7): 1–25 mm.
• Dynamic balancing grade: ≤ G1.
• Tool holder radial run-out: ≤ 2 μm.
• Combined radial run-out (assembly): ≤ 5 μm.
• Internal coolant: supported when configured for center-through coolant.