Collet Chuck Holder For Tomrach C3-4 ER20A 1.38L CNC Metalworking Tooling, Workholding Accessory With Three Quarter Inch Shank, Pro Grade Runout Control 0.0003 Inch, Balanced To 12000 RPM, Includes Collet Nut, Silver Finish

Collet Chuck Holder for C3/4-ER20A, 1.38L, 12k RPM, 1pc
✔️ Shank 3/4 (19mm); length 1.38 (35mm); overall 2.68 (68mm)

This Collet Chuck Holder is a precision tool designed to mount ER20 collets in CNC machines. It is compatible with standard spindle setups and is commonly used in metalworking shops and manufacturing facilities for milling, drilling, and precision tasks.

✅ Chuck Runout (TIR): 0.0003" (0.008 mm)
✅ Shank diameter: 3/4" (19 mm) and length: 1.38" (35 mm)
✅ Overall length: 2.68" (68 mm) with flange 1.50" (38 mm)
✅ Balanced to 12,000 RPM for stable high-speed milling
✅ Includes collet nut for immediate tool-holding compatibility

💡 What is a collet chuck holder used for in CNC setups?

It's a handy way to secure tools and keep alignment across ER20 collets.

• Improves runout control and precision at high speeds
• Handy for quick tool changes with ER20 collets
• Supports 12,000 RPM balanced operation for stable milling
• Ensures repeatable positions and clean tool seating