Haimer 40.840.25.4 Shrink-fit Holder CAT40 0.9843 in

Product Description

The HAIMER 40.840.25.4 is a shrink-fit tool holder adapter designed for CNC machining centers running CAT40 taper spindles. It accepts cutting tools with a 0.9843-inch (25 mm) bore diameter and delivers a 3.937-inch projection from the spindle face. The holder features through-coolant capability with Cool Jet and resealable bores, allowing high-pressure coolant to reach the cutting zone directly. Balanced to 25,000 RPM, this holder suits high-speed finishing and semi-finish operations where runout control and vibration damping are critical. Machinists and tool-crib technicians working in aerospace, die-mold, and precision manufacturing will encounter this holder frequently.

This holder installs in CAT40 spindle machines across a wide range of vertical and horizontal machining centers used in production and job-shop environments. The 2.2835-inch clamping depth provides a secure grip on compatible shank tooling. The 1.7323-inch nose diameter and 100 mm projection make it suitable for reaching into moderate-depth pockets and features without excessive overhang. Through-coolant support makes it appropriate for high-feed milling, deep-hole drilling, and extended-reach applications where chip evacuation is a priority.

Key Features

• CAT40 taper shank for direct spindle mounting on standard CAT40 machining centers
• 0.9843-inch (25 mm) bore diameter for shrink-fit tool retention
• 3.937-inch (100 mm) projection for extended-reach applications
• Through-coolant design with Cool Jet and resealable bores for directed high-pressure coolant delivery
• Balanced to 25,000 RPM for high-speed machining operations
• 2.2835-inch (58 mm) clamping depth for secure tool engagement

Compatibility

Designed as an OEM-style shrink-fit tool holder for CAT40 spindle machining centers accepting tooling with a 0.9843-inch bore diameter.

Installation Notes

Shrink-fit holders require an induction heating unit to thermally expand the bore before tool insertion - never force tooling in or out of a cold holder. Always power down and lock out the spindle before removing or installing any tool holder. Follow the machine tool builder guidelines and applicable ANSI B11 safety standards for tool-holder installation and torque on the retention knob. Allow the holder to cool fully and verify tool runout with a dial indicator before returning the spindle to service.