ER25 8 mm Collet Tool Holder

Product Overview

The ER25 8 mm Collet is a critical precision component engineered to ensure axial and radial stability for cutting tools, even at high speeds and feed rates. Featuring a conical inner and outer surface, this collet deforms radially when tightened with an ER nut, gripping the tool shank with uniform force distribution. This mechanism minimizes vibration, optimizes runout accuracy, and maintains dynamic balance during operation. Designed in accordance with DIN 6499 / ISO 15488 standards, it offers universal compatibility across a wide range of machinery.

Constructed from high-strength, wear-resistant alloy steel (such as 65Mn or 40CrMnTi), this collet undergoes specialized hardening and tempering to achieve a surface hardness of HRC 44-48, ensuring durability and resistance to deformation. Precision grinding of the conical surfaces ensures geometric accuracy, which is fundamental to maintaining low runout. It is designed for seamless integration with ER25 nuts and various holders (BT, CAT, HSK, SK), making it ideal for CNC milling, lathes, and tool grinding machines.

Key Advantages

• Micron-Level Runout Control: Minimizes deviation from the rotation axis, ensuring balanced contact between the cutting edge and the workpiece. This extends tool life, reduces vibration, and improves surface finish quality.
• Optimal Clamping and Centering: The 0.5 mm clamping range tolerance compensates for minor shank variations, providing maximum grip strength and preventing tool slippage or breakage.
• Operational Reliability: When used with proper torque and maintained clean, this collet ensures long-term performance and prevents fretting corrosion, maintaining high precision throughout its service life.

Mermak CNC Quality Assurance

With 16 years of experience, Mermak provides high-quality industrial components 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 ensure careful packaging, professional documentation, and reliable logistics for our customers in the United Kingdom, United States, Canada, Australia, New Zealand, South Africa, and other international markets. We offer video verification of products via WhatsApp upon request.