ER Nut Collet Spring Collection – Precision Clamping for CNC Milling & Engraving Machines
Upgrade your CNC milling or engraving setup with our high‑performance ER Nut Collet Spring Collection. Designed to fit a wide range of ER sizes—ER8, ER11, ER16, ER20, ER25, ER32—and standard M, UM, and NUT fasteners, this set delivers reliable, repeatable clamping for a variety of tools and workpieces.
Key Features
- 🔧 Universal Compatibility: Works seamlessly with ER8, ER11, ER16, ER20, ER25, ER32 collets and standard M/UM/NUT bolts.
- ⚙️ High‑Tensile Spring Steel: Ensures consistent pressure and long‑lasting durability under heavy machining loads.
- 🛠️ Easy Installation: Simple, tool‑free assembly—no special machining or drilling required.
- 💡 Enhanced Precision: Maintains tight tolerances for smooth, accurate cuts and engravings.
- 🔒 Secure Lock‑In: Reduces wobble and vibration, improving finish quality and operator safety.
- 🌱 Eco‑Friendly Manufacturing: Produced with recyclable materials and minimal waste.
Compatibility & Applications
Whether you’re working on metal, plastic, wood, or composite materials, our ER collet springs fit a wide range of CNC milling and engraving machines. Ideal for:
- High‑speed milling operations
- Precision engraving and detailing
- Prototyping and small‑batch production
- Tool holders and collet systems in industrial and hobbyist setups
Installation & Use
1. Select the appropriate spring size for your ER collet.
2. Slide the spring into the collet housing, aligning the notch with the collet’s internal groove.
3. Tighten the collet nut to lock the spring in place.
4. Verify clamping force and adjust as needed for optimal performance.
Why Choose Our ER Nut Collet Springs?
With over a decade of engineering expertise, we deliver products that combine reliability, affordability, and ease of use. Our springs are rigorously tested to meet industry standards, ensuring your CNC machine runs smoothly and your workpieces achieve the highest quality finish.
Specifications
Material: High‑Tensile Spring Steel
Dimensions: Custom sizes for ER8, ER11, ER16, ER20, ER25, ER32
Weight: Lightweight construction for quick changes
Warranty: 12‑month limited warranty on all parts
Price: Original price was: $ 4.22.$ 2.11Current price is: $ 2.11.

