Iscar 4504616 Shrink-fit Tool Holder Adapter CAT40

Product Description

The ISCAR 4504616 is a shrink-fit tool holder adapter designed for precision CNC milling and machining applications. It features a CAT40 taper shank interface and accepts cutting tools with a 0.375-inch hole diameter. The adapter provides 4.63 inches of projection from the spindle face, a 0.63-inch nose diameter, and a clamping depth of 1.42 inches. Balanced to 25,000 RPM, it is suited for high-speed machining operations where runout and vibration control are critical. Through-coolant capability directs cutting fluid directly to the tool tip. This adapter is installed by CNC machinists and toolroom professionals.

This shrink-fit holder adapter is used in CNC machining centers equipped with CAT40 spindle interfaces. It is appropriate for both roughing and finishing operations where extended reach is required. The 4.63-inch projection makes it well-suited for deep-cavity milling, die-and-mold work, and applications where standard-length holders would cause interference. Through-coolant support improves chip evacuation and tool life in demanding cutting conditions.

Key Features

• CAT40 taper shank for compatibility with standard CNC machining center spindles
• 0.375-inch (3/8 inch) bore diameter for shrink-fit tool clamping
• 4.63-inch projection for extended-reach machining applications
• 1.42-inch clamping depth for secure tool retention
• Balanced to 25,000 RPM for high-speed spindle operation
• Through-coolant design for direct coolant delivery to the cutting zone

Compatibility

Designed for use in CNC machining centers with CAT40 spindle taper interfaces accepting shrink-fit tool holder adapters with a 0.375-inch bore diameter.

Installation Notes

Installation requires a shrink-fit induction heating unit to thermally expand the bore before tool insertion — never attempt to press or hammer tools into a shrink-fit holder. Ensure the spindle and holder tapers are clean and free of chips or burrs before mounting. Verify dynamic balance requirements are met for the intended RPM range before running at high speed. This type of tooling is typically installed and set up by qualified CNC machinists or toolroom personnel.