ER20 4 mm Collet Tool Holder

ER20 4 mm Collet Tool Holder

Industrial Automation Components | Premium Performance Series

The ER20 4 mm Collet is a critical component designed to ensure the precision and stability of cutting tools during machining processes. Engineered in accordance with EN ISO 15488 (formerly DIN 6499) standards, this collet features a conical design that works with the tool holder nut to provide uniform radial clamping force on cylindrical shanks. This mechanism ensures the tool is secured with minimal runout relative to the spindle axis, preventing slippage or vibration even under heavy cutting loads. Its 4 mm capacity is ideal for micro-machining, fine milling, precision drilling, and engraving applications.

Manufactured from high-alloy spring steel, this collet undergoes specialized heat treatment to achieve optimal flexibility, wear resistance, and fatigue strength. It maintains its clamping force and accuracy through repeated cycles. Due to the universal ER standard, it integrates seamlessly with BT, CAT, HSK, and straight-shank ER-compatible holders, offering operational flexibility for mold making, aerospace, medical device manufacturing, and electronics production.

Key Advantages

• High Precision and Low Runout (3 µm): The 3-micron runout accuracy minimizes deviation, ensuring balanced contact between the cutting edge and the workpiece. This improves surface finish (Ra, Rz) and geometric tolerances, while extending tool life by preventing uneven wear.
• Secure Tool Clamping: When tightened to the correct torque, the collet creates a high-friction interface that prevents tool pull-out during high-speed operations. Its high rigidity absorbs vibrations, allowing for higher feed rates and improved material removal efficiency.
• Wide Compatibility: The modular ER20 design is compatible with a vast range of CNC milling, turning, and drilling systems, simplifying tool inventory and enhancing workshop versatility.

Mermak CNC: Your Trusted Partner in Precision
With 16 years of experience, Mermak CNC operates from our Ankara Uzay Sanayi facility. We maintain up-to-date stock levels and prices on our website. Stocked items are prepared immediately for shipment without production delays. We provide careful packaging, reliable logistics, and full documentation support. We serve customers in the United Kingdom, United States, Canada, Australia, New Zealand, South Africa, and other international markets. Upon request, we can provide product videos or factory viewing via WhatsApp and other contact channels.