ER20 One Quarter Inch Spring Collet Chuck For CNC Milling Lathe And Engraving Machines, Boss Level Precision 0.015mm Tolerance, 40Cr Steel Construction, Versatile Fit For Machining Centers And CNC Routers, Heavy Duty Tooling For Milling And Engraving

ER20 1/4 Inch Spring Collet Chuck for CNC Milling
✔️ 1/4 in clamping dia, ER20, 40Cr steel, 0.015 mm tolerance

This ER20 spring collet chuck is a precision tool designed to securely hold 1/4" diameter end mills for CNC milling, engraving, and other high-speed machining tasks. Built from rugged 40Cr steel, it delivers dependable rigidity and long service life on machining centers, CNC routers, and general milling machines.

✅ 1/4 in (6.35 mm) clamping diameter for ER-20 collets
✅ Material: 40Cr steel for durability and rigidity
✅ Precision: 0.015 mm (0.0006 in) tolerance for tight runout
✅ Applications: machining centers, CNC milling machines, engraving, and high-speed routers
✅ Package Content: 1 x Spring Collet Chuck

💡 What is the best use case for an ER20 spring collet chuck in CNC milling and engraving projects? This handy tool keeps a tight grip on 1/4 inch end mills, reducing tool chatter. - Secure retention of 1/4 inch end mills during high-speed milling - Maintains concentricity and reduces runout for clean engraving - Easy to swap tools on standard ER-20 spindles in milling centers