Self-Releasing ER-40 R8 17-Piece Spring Collet Chuck Set for Milling and Drilling, Boss-Level Precision to.0005 Inch, Wide Holding Range, Fits One-Eighth to One Inch Shanks, Rugged Spring Collet System

Self-Releasing ER-40 R8 Collet Chuck Set, 17-Piece
✔️ 17-piece spring collet set; holds 1/8 to 1 in shanks (3.175-25.4 mm)

High-precision collet chuck system designed for milling and drilling, delivering superb holding range and consistent accuracy to.0005 inch. Ideal for shop floors needing reliable tool retention and quick changes.

✅ 17-piece ER-40 R8 spring collet chuck set (milling/drilling)
✅ Self-releasing system for quick tool changes
✅ Wide holding range from 1/8 in to 1 in (3.175-25.4 mm)
✅ Accuracy to 0.0005 in (0.0127 mm)
✅ Drawbar end thread 7/16-20
✅ Comes with fitted case

💡 What is a spring collet chuck used for in milling and drilling?

• Secure grip for milling and drilling tasks with tight tolerances
• Quick tool changes to keep production moving
• ER-40 R8 compatibility for common machine setups

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