Lathe Tool Combined ER Collet Chuck AA — ER11 / ER16 / ER20 / ER25 / ER32 Spring Collet Tool Holder ER25 20PCS pack Key benefits Versatile tool holding: Accepts standard ER series collets (ER11, ER16, ER20, ER25, ER32) to cover a wide range of tool shank sizes without changing your spindle or adapter. Secure, repeatable clamping: Spring collet design provides firm grip and easy tool changes for milling, drilling, engraving, tapping and lathe work. Saves time and tooling costs: One collet chuck system eliminates frequent toolholder swaps and keeps setups simple for shortrun or mixedtool operations. Main features and attributes Model/Series: Lathe Tool Combined ER Collet Chuck AA (spring collet style) Supported collet sizes: ER11, ER16, ER20, ER25, ER32 Primary applications: CNC milling, drilling, engraving, tapping, and lathe operations Format: Spring (ER) collet tool holder compatible with standard ER collets Pack option shown: ER25 20PCS (20 pieces of ER25 collet chucks included) Compatibility: Designed for machines and toolposts that accept standard ER collet chucks and ER collet accessories Why customers choose this product Flexibility: Keep a full set of commonly used ER sizes on hand to match small to medium tool diameters without special adapters. Efficiency: Quick tool changes and reliable clamping reduce downtime between operations. Practical for shops of any size: Useful in prototyping, toolrooms, hobby CNC setups, and production environments where multiple tool sizes are needed. Typical use cases 1) Precision engraving and smalldiameter milling: Use ER11 or ER16 holders for small end mills and engraving tools to maintain concentric grip and reduce tool wobble during detailed work. 2) Generalpurpose CNC milling and drilling: Use ER20 or ER25 holders for standard end mills, drills and reamers in mediumduty machining applications. 3) Lathe or versatility: Install ER collet chucks in toolposts or spindles to switch quickly between tapping, drilling and light turning operations without multiple dedicated holders. Practical notes for use Match collet size to tool shank diameter for clamping performance; do not rely on oversized or undersized shanks. Tighten the collet nut to the recommended hand/torque level for your machine and tooling; ensure proper seating before cutting. Inspect collets and chucks periodically for wear to maintain consistent accuracy and clamping force. What's included (as per product option) ER25 20PCS pack: Twenty ER25 spring collet tool holders (other ER sizes listed in the product series are available separately as ER11, ER16, ER20, ER25 and ER32 options). This Lathe Tool Combined ER Collet Chuck AA series offers a simple, effective collet solution for a range of CNC and lathe operations. Choose the ER size and pack that match your tooling needs to streamline setups and improve workflow.