Name: 1/4 Inch Shank Router Bit Extension Collet ER20M Extender Chuck Converter Adapter for Milling Lathe and CNC Engraving Machines, Lets You Use 1/2 Inch and 1/4 Inch Shank Bits with Ease
Brand: Bearings
SKU: 14-inch-shank-router-bit-extension-collet-er20m-ex
Availability: InStock

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1/4 Inch Shank Router Bit Extension Collet ER20M Extender Chuck Converter Adapter for Milling Lathe and CNC Engraving Machines, Lets You Use 1/2 Inch and 1/4 Inch Shank Bits with Ease

$18.04

Original: $51.54

-65%

1/4 Inch Shank Router Bit Extension Collet ER20M Extender Chuck Converter Adapter for Milling Lathe and CNC Engraving Machines, Lets You Use 1/2 Inch and 1/4 Inch Shank Bits with Ease—

$51.54

$18.04

The Story

1/4 Inch Shank Router Bit Extender with ER20M Collets
✔️ 1/4 shank extension includes 1/2 and 1/4 ER20M collets and wrench

This extender is a carbide-based collet extension that lets you run 1/2" and 1/4" shank router bits on a standard router, milling machine, or CNC engraving setup. It ensures tight retention and stable performance for precise cuts on wood, acrylic, and other materials.

✅ Size: shank diameter 1/4", accepts 1/2" and 1/4" shank router bits.
✅ Material: carbide body with ER20M spring collet; high strength and shock resistance.
✅ Widely used: woods, MDF, laminate, particleboard, plywood, acrylic; high precision and stable performance.
✅ Easy to use: insert ER collet into extension, fit bit, tighten with wrench; insert fully for best results.
✅ Package includes: 1 extension, 1/2" ER20M collet, 1/4" ER20M collet, 2 ER20M screw caps, 1 ER20M wrench.

💡 What is an ER20M router bit extension used for in CNC milling and engraving? A handy accessory to extend reach and accommodate larger shank bits on standard machines. - Extends depth of cut with proper extension
- Works with 1/2" and 1/4" shank router bits
- Includes ER20M collets and wrench for fast changes