Techniks SYIC-22917 End Mill Holder CAT40 Retention Knob

The Techniks SYIC-22917 End Mill Holder CAT40 with Retention Knob is a precision toolholding solution that securely clamps 1/2-inch shank end mills for milling, slotting, profiling, and roughing on CAT40 CNC machines. Constructed from hardened alloy steel, this Side Lock End Mill Holder (SLN) uses H5 precision-ground bore and AT3 precision-ground taper to minimize runout, with a 3.00 in projection, 1/2 in bore, 1.75 in body diameter, 2.50 in overall diameter, and a 1.25 in nose diameter. Weighing about 3.1 lb, it is designed for up to 15,000 RPM with a G6.3 balance and a maximum runout optimized by the H5 bore tolerance. Coolant options include Standard, CoolBLAST, and CoolFLEX configurations, and a retention knob is included depending on configuration. The holder mates to CAT40 spindles for rigid side-lock tooling and precise spindle alignment, making it suitable for aerospace, automotive, mold and die, heavy equipment fabrication, and high-volume metalworking where accurate clamping and vibration resistance are essential. Manufacturer: Techniks Precision Tooling; MPN: 22917 (SYIC-22917).