The Omega BT40 End Mill Holder (S/L40, Form AD) is a precision toolholder for BT40 spindle systems, engineered to deliver secure tool seating and dependable performance in high-speed milling. Suitable for professionals and hobbyists alike, it keeps end mills aligned with minimal runout as you push speeds up to 20,000 RPM. Crafted from high-quality materials, it provides lasting stability and durability across demanding machining tasks.

• G2.5 Precision at up to 20,000 RPM: The holder is machined to a tight G2.5 tolerance, ensuring minimal runout and accurate tool positioning even at high spindle speeds, so you get consistent cuts and reliable results every time.
• BT40 Compatibility with 40 mm Bore and Form AD: Designed to fit standard BT40 tooling with a 40 mm bore, this holder ensures secure seating and repeatable clamping force, reducing tool-change downtime and preserving accuracy across jobs.
• 120 mm Gauge Length for Stable Engagement: The 120 mm gauge length provides a long, rigid engagement that improves tool height control, minimizes deflection under load, and supports stable performance across different setups.

This combination of precision, compatibility, and durability helps you accelerate workflows, deliver cleaner finishes, and maintain high productivity in both new builds and retrofit projects. With dependable toolholding, you spend less time chasing alignment and more time milling confidently, knowing your tooling will perform consistently from job to job.