Designed for BT40 spindle machines, the Omega BT40 Synchro Tapping Chuck with ER25 compatibility delivers fast, precise tapping across a wide range of sizes. It supports taps from M3 to M20, making it suitable for metalworking, manufacturing, and hobbyist projects that demand reliable threaded holes with repeatable accuracy. Synchronous tapping for flawless threads: The integrated synchro mechanism keeps the chuck and spindle in perfect sync, delivering clean, consistent threads and reducing the need for rigid tapping cycles. Wide capacity and BT40/ER25 compatibility: Accepts taps from M3 to M20 and works with ER25 tooling, enabling a broad set of tapping tasks without changing setups or tooling families. Rugged, durable construction: Built with sturdy materials and precision engineering to resist wear, deliver long tool life, and maintain accuracy even in high-speed or demanding applications. This tapping chuck is designed to boost productivity with shorter cycle times and reliable performance, helping you complete projects faster while preserving tool life. It enables consistent results across multiple sessions, reduces downtime for tool changes, and gives you confidence that your tapping operations will stay precise from first hole to last.