Omega BT40 End Mill Holder (Form AD, S/L25) is a precision toolholding solution for BT40 spindle machines used in high-speed milling. It anchors end mills securely at speeds up to 20,000 RPM, delivering accurate tool positioning and repeatable performance across demanding machining tasks.

With a 25 mm bore and a 35 mm gauge length, this holder provides a rigid, stable interface that minimizes runout and vibration, even during heavy cuts.

• High‑speed rigidity: engineered for up to 20,000 RPM to maintain precise alignment and minimize runout, delivering consistent finishes even at high feed rates.
• Precise seating for repeatable results: G2.5 accuracy ensures reliable tool seating and concentricity, reducing tool wear and delivering uniform performance across jobs.
• Durable, compatible design: 25 mm bore fits standard end mills, with a 35 mm gauge length that reinforces stability during milling; constructed from high‑quality materials for long life.

This end mill holder helps you speed up setup, reduce downtime, and achieve reliable tool performance across metals and composites. By maintaining strict runout control and a rigid interface, it improves surface finish, extends tool life, and supports consistent results across shifts and operators—giving your shop confidence in every milling operation.