Seco 02753252 Shrink-fit Tool Holder CAT40 0.25 in

Product Description

The SECO 02753252 is a shrink-fit tool holder adapter designed for precision CNC machining applications. Built with a CAT40 taper shank, it accepts cutting tools with a 0.25 inch bore diameter and provides a projection of 3.74 inches from the spindle face. The adapter features through-coolant capability, directing coolant directly to the cutting zone for improved chip evacuation and tool life. With an overall length of 6.43 inches and a nose diameter of 0.826 inches, it delivers a compact, balanced profile suitable for high-speed work. This holder is balanced to 45,000 RPM, making it appropriate for high-performance machining centers requiring tight runout tolerances. Weighing 2.62 pounds, it is a solid, production-grade component installed by CNC machinists and toolroom technicians.

This shrink-fit adapter is used in CNC vertical and horizontal machining centers equipped with CAT40 spindle interfaces. It is well suited for high-speed milling, drilling, and finishing operations where tool concentricity and balance are critical. The through-coolant feature makes it a practical choice for deep-cavity work or applications where flood coolant alone is insufficient. A clamping depth of 1.023 inches provides secure tool retention when used with compatible shrink-fit induction heating equipment. Typical users include production machinists and toolroom technicians working in aerospace, automotive, mold and die, and general metalworking environments.

Key Features

• CAT40 taper shank for direct mounting to standard CAT40 spindles
• 0.25 inch bore diameter accommodates common shank-size cutting tools
• Through-coolant design channels fluid directly to the cutting edge
• Balanced to 45,000 RPM for stable high-speed machining
• 3.74 inch projection with 0.826 inch nose diameter for reach into confined features
• 1.023 inch clamping depth for secure shrink-fit tool retention

Compatibility

Designed as an OEM-style shrink-fit tool holder for CNC machining centers with a CAT40 spindle interface. Requires compatible shrink-fit induction heating and cooling equipment for tool installation and removal.

Installation Notes

Installation and removal of cutting tools requires a dedicated shrink-fit induction heating unit and cooling sleeve — never attempt to press or hammer tools into a shrink-fit bore. Power down and lock out the machining center spindle before mounting or removing the holder. Verify through-coolant port alignment with the machine spindle before torquing the retention knob to the spindle manufacturer's specification. A licensed machinist or qualified CNC toolroom technician should perform setup to ensure proper balance and runout compliance.