ER25 Collet Nut

ER25 Collet Nut

Industrial Automation Components | Premium Performance Series

Product Overview

The ER25 Collet Nut is a critical mechanical component engineered for the secure and high-precision fastening of cutting tools into spindle shafts via ER25 collets in modern CNC machining centers. By applying axial force to the conical surface of the collet, this nut ensures radial compression, creating a stable gripping mechanism against high RPMs, dynamic loads, and vibrations encountered during machining. Under optimal tightening torque, it minimizes axial and radial runout to micron levels, directly enhancing machining accuracy, surface finish, and tool longevity.

Constructed from high-carbon steel alloy subjected to specialized heat treatment, this nut offers exceptional strength and wear resistance. The structural integrity is maintained even under repetitive stress cycles. A Black Oxide surface coating provides an additional layer of protection against corrosion, oxidation, and mechanical wear, extending the service life in industrial environments involving moisture or aggressive cutting fluids. The ER25 Collet Nut is fully compatible with industry-standard ER25 collet holders and is easily integrated into existing systems. It is a strategic component for sectors requiring absolute precision, such as aerospace, defense, medical device manufacturing, precision mold making, and automotive component production.

Key Advantages

• Minimum Runout Tolerance: Ensures the ER25 collet is fixed with micron-level precision, minimizing Total Indicated Runout (TIR). This results in a homogeneous cutting load distribution, improved surface roughness (Ra) values, and extended tool life.
• High-Strength Material and Advanced Surface Treatment: Manufactured from heat-treated high-carbon steel, the nut exhibits superior tensile strength and fatigue resistance. The Black Oxide finish optimizes the friction coefficient for efficient torque transfer while protecting against atmospheric and chemical degradation.
• Optimized Clamping and Vibration Damping: The internal geometry and thread profile are optimized for uniform force distribution, preventing over-tightening and ensuring maximum grip. The material properties effectively dampen resonance frequencies and vibration amplitudes during operation.

Mermak CNC: With 16 years of experience at our Ankara Space Industry facility, we provide reliable solutions to international markets, including the United Kingdom, United States, Canada, Australia, New Zealand, and South Africa. Our website stock and pricing are kept up to date. Stocked products are prepared immediately from our warehouse without production delays. We ensure careful packaging, professional invoice follow-up, and coordination with reliable logistics partners. Product videos or factory viewing via WhatsApp are available upon request.