CNC tool holders and tool posts are core functional components of machining centers. They directly affect machining accuracy, tool life, cutting stability and production efficiency. This article systematically explains tool holder classification, materials, accuracy, clamping types, tool post selection and applications in a professional and easy-to-understand manner, suitable for machining, procurement and engineering reference.
Classification by Spindle Interface
- BT Tool Holder：BT30 / BT40 / BT50
- HSK Tool Holder：Features: High-speed stability, strong rigidity, excellent balance
- SK / DAT Tool Holder：Better high-speed performance than traditional BT
- ER Collet Chuck：Most widely used, elastic clamping, quick setup
How to Select Correctly？
- Confirm spindle type: BT30/40/50, HSK, CAT, SK
- Choose clamping type by application:General → ER；High precision → Hydraulic / Shrink Fit；Heavy cutting → Power Milling / Side Lock
- Select balance grade by RPM
- Choose tool post by process & station count