Omega's BT40 ER Collet Chuck (ER16, 70mm gauge length, Form AD) is a precision tool holder engineered for BT40 spindle systems. It delivers secure clamping and dependable performance at up to 20,000 RPM, making it ideal for high-speed milling and precise drilling tasks.

• BT40 spindle compatibility: Designed to mount securely on standard BT40 spindles for reliable tool retention.
• Collet size: ER16 compatibility to cover a broad range of cutting tools with strong grip.
• Speed rating: Rated up to 20,000 RPM to support fast, high-precision machining.
• Precision: G2.5 accuracy indicating minimal runout and excellent concentricity for better surface finish.
• Gauge length: 70 mm gauge length provides balanced reach and rigidity during demanding cuts.
• Form: Form AD design ensures secure, repeatable tool seating and quick changes.

This tool holder directly translates precision into productivity. The tight G2.5 tolerance reduces runout, helping you achieve cleaner cuts and longer tool life, while the ER16 collet delivers a firm grip on shanks across a wide range of tools. With its 70 mm gauge length and Form AD construction, you gain stable overhang, improved balance, and faster changeovers—benefits that matter in contouring, pocketing, and fine finishing operations on both aluminum and steel workpieces.