ER20 spring collar clamps – Pack of 15 pieces in carbon steel, precision HRC48-50 for milling machines and engraving machines

🔧 General Description: Set of highly precise E20 spring chucks, ideal for engraving machines, milling machines, and lathes. Made of hardened bearing steel (HRC 48–50), it guarantees a firm grip, perfect centering, and a long service life. Perfect for demanding hobbyists and professionals in prototyping or CNC engraving. 📊 Technical Specifications Type: Set C ER20 – 15 pieces Diameters included: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 mm + 1/4″ (6.35 mm) + 1/8″ (3.175 mm) Material: Carbon bearing steel Hardness: HRC 48–50 Weight: 572 g Packaging dimensions: 200 × 150 × 100 mm ⚡ Installation Quick and intuitive installation — no special tools required. Simply insert each chuck into its ER20 chuck holder or machine spindle. The self-centering system ensures immediate and play-free mounting. 🎯 Ideal for fine engraving, light milling, drilling, tapping, and machining small parts. Holds tools without vibration or shifting, significantly improving cutting accuracy and finished quality. Perfect for home and professional workshops alike. ℹ️ Other information: Each chuck is precision ground on all critical surfaces. Reinforced design with alternating grooves at both ends for increased strength and optimal grip. Universally compatible with all standard ER20 chucks—no specific brand required.