ER11 Collet Nut Cap

ER11 Collet Nut Cap

The ER11 Collet Nut is a critical mechanical component engineered for modern CNC machining centers, high-speed spindle units, and precision automation systems. It is designed to secure cutting tools to the spindle axis with absolute accuracy. By converting axial tightening force into radial pressure on the ER series collet’s conical surface, this nut prevents tool slippage and maintains dynamic balance during operation.

Featuring a precise M14x0.75 thread structure and optimized internal conical geometry, this nut ensures a uniform distribution of clamping force. This minimizes axial and radial movement, keeping the Total Indicated Runout (TIR) below 0.005mm. Such precision extends tool life, optimizes surface finish, and guarantees geometric accuracy for the final workpiece, even at high speeds exceeding 24,000 RPM.

Technical Specifications and Material Quality

Manufactured from high-strength alloy steel (such as 40Cr or 42CrMo), this nut offers superior tensile strength, fatigue resistance, and impact durability. Surface hardening processes achieve a hardness range of HRC 48-52, providing excellent resistance against wear, corrosion, and mechanical deformation. The precision-ground threads and internal cones minimize friction while maximizing torque transfer capability.

Compliant with DIN 6499 / ISO 15488 standards, this nut integrates seamlessly with standard ER11 collet holders, making it ideal for CNC milling, turning, engraving, and micro-drilling applications.

Why Choose Mermak?

With 16 years of experience, Mermak operates from its factory and warehouse in the Ankara Aerospace Industrial Zone. We provide reliable logistics and professional support to international markets, including the United Kingdom, United States, Canada, Australia, Ireland, New Zealand, South Africa, and other English-speaking regions. Our website reflects real-time stock and current pricing. We ensure careful packaging, efficient documentation, and prompt dispatch. Upon request, we can provide product videos or factory viewing via WhatsApp or our contact channels.