Tecnara 250-304-6 Tool Holder Chuck

The Tecnara 250-304-6 Tool Holder Chuck delivers reliable, high-precision tool retention for CAT40 CNC milling and machining centers, enabling consistent milling, drilling, and tooling operations. This end mill holder (tool holder chuck) clamps cutting tools with a side lock set screw and supports a 1/2 in. capacity (holder size 304) while offering a 6 in. projection length for extended reach in tight setups. Constructed from hardened alloy steel, it provides rigid, accurate performance and durable service as an OEM replacement component for vertical and horizontal machining centers and CNC milling machines. Designed for production machining, tooling replacement, and preventive maintenance workflows, it supports aerospace, automotive, mold and die, and general machining environments where high concentricity and reliable tool retention are essential. Common replacements include Tecnara 250-304-4, Tecnara 250-304-5, and Techniks CAT40 holders, making it straightforward to integrate into existing CAT40 spindle systems.