ER Collet Nuts for Your Spindle

🔩 Extra Collet Nuts for Your Spindle

Stay ready with spares. Keep carving with confidence.

Need a backup or a direct replacement for your spindle’s collet nut? These high-quality ER collet nuts from PwnCNC are the same ones we include in our spindle kits—and they’re now available individually for your convenience.

🛠️ Compatibility

• ER11A Collet Nuts — For 65mm spindle motors 
  * Note, due to a manufacturing mistake, our silver ER11 nuts were labeled as ER20.  We have discounted them until they're gone.

• ER20A Collet Nuts — For 80mm spindle motors

⚠️ Not compatible with ISO20 ATC systems.
If you’re running an ATC setup, you’ll want ISO20 Tool Holders instead.

🧰 Available Options

• 🖤 Black Collet Nuts
  • Balanced to 14,000 RPM
  • Ideal for woodworking, acrylic, and general-purpose CNC use

• 🪙 Silver Collet Nuts
  • Balanced to 18,000 RPM
  • Perfect for metalworking and high-speed, high-precision jobs
  • These are the same nuts featured in our High-Precision ER Collet Sets

🔍 Want to Learn More?

Check out our Knowledge Base Guide on ER Collets to understand sizing, compatibility, and performance tips.

Whether you're replacing a damaged nut or building a full tooling kit, having extras on hand keeps your CNC projects running smoothly.