BT collet chuck

SKmillingdrilling

Overview
The BT-SK collet tool holder is designed for milling and drilling operations where torque transfer is prioritized over maximum clamping range. The SK collet geometry delivers approximately 1.5× greater clamping torque, accepts tool shanks in h7 tolerance from 1 to 25 mm and can be used with internal (center-through) coolant when configured.

Key points

• Designed for torque-focused milling and drilling applications
• SK collet geometry delivers ~1.5× greater clamping torque vs other collet types
• Accepts 1–25 mm h7 tool shanks
• Supports internal (center-through) coolant where arranged

Performance

• Tool-holder run-out accuracy: ≤ 2 μm
• Combined run-out accuracy: ≤ 5 μm
• Dynamic balancing grade: ≤ G1

Applications

• Milling operations requiring increased torque transfer
• Drilling and heavy-engagement machining where holding strength is prioritized over maximum clamping range

Technical specifications

• Model: BT-SK
• Collet type: SK (high-torque geometry)
• Torque: SK collet provides approximately 1.5× greater clamping torque vs other collet types
• Supported tool diameters: 1–25 mm (h7)
• Internal coolant: supported (center-through where arranged)
• Tool holder run-out (tool holder): ≤ 2 μm
• Combined run-out: ≤ 5 μm
• Dynamic balancing grade: ≤ G1