ER20 Collet Chuck Extension Rod For Milling And Drilling With Three Quarter Inch Straight Shank, 3.93 Inch Overall Length, 2.50 Inch Shank Length, 0.04 To 0.511 Inch Capacity, Heavy Duty Hardened Alloy Steel For Extra Reach On CNC And Manual Machines

ER20 Collet Extension Rod for Milling and Drilling 3/4in ✔️ 3/4in straight shank, 2.50in length, 3.93in overall, single-piece

This ER20 Collet Extension Rod is a precision tool adapter that extends reach for milling and drilling tasks. It works with ER20 collets on CNC and manual machines, helping you reach into tight spaces and long tool-paths with consistent tool holding.

✅ Compatible with ER20 collets; tool diameters 0.04-0.511 in (1.0-13.0 mm)
✅ 3/4 in (19.05 mm) straight shank; 2.50 in (63.50 mm) length; 3.93 in (99.80 mm) overall
✅ Hex collet nut diameter 1.34 in (34.04 mm); internal 3/8-16 thread; 0.90 in (22.86 mm) flat-to-flat
✅ Hardened alloy steel, HRC 56-60; precision-ground to 0.0002 in runout

💡 What is an ER20 collet extension rod used for in milling and drilling applications?

Here's the handy breakdown for quick scanning.

- ER20 collet extension rod extends reach for deep pockets and tight spaces in milling and drilling - Keeps tool alignment solid on CNC and manual machines when running long tool paths - Handy for projects requiring precise, repeatable tool placement with improved accessibility