Collis Tool 75020 End Mill Holder CAT40 Taper Shank

Product Description

The COLLIS TOOL 75020 is a CAT40 taper shank end mill holder designed for use in CNC machining centers requiring a secure, high-concentricity connection between the spindle and end mill. It features a 3-inch projection and a 1-5/8-inch nose diameter, accommodating a 16 mm bore for end mill shanks. The holder supports through-spindle and DIN flange coolant delivery, making it well-suited for cutting operations that demand continuous coolant flow to the cutting zone. This is a tooling component installed by machinists and CNC setup technicians in production shop environments.

The 75020 is intended for use in machining centers equipped with CAT40 spindle interfaces. The 3-inch projection provides clearance for workholding fixtures and molds, and the 2.25-inch flange diameter is consistent with standard CAT40 retention knob and drawbar systems. It is applicable in milling operations involving ferrous and non-ferrous materials where flood or through-coolant strategies are used to manage tool temperature and chip evacuation.

Key Features

• CAT40 taper shank for compatibility with standard CNC machining center spindles
• 3-inch projection for reach into deep cavities or past fixture obstructions
• 16 mm bore diameter accommodates standard end mill shank sizes
• Through-spindle and DIN flange coolant delivery for active chip and heat control
• 2.25-inch flange diameter suits standard CAT40 tooling systems
• 1-5/8-inch nose diameter provides robust clamping section at the tool interface

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for CNC machining centers equipped with CAT40 spindle tapers and through-spindle coolant capability.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician with the spindle at a complete stop and the machine in a locked-out, energy-isolated state per OSHA lockout/tagout requirements. Use a calibrated torque wrench and the appropriate retention knob for the CAT40 interface when seating the holder in the spindle. Inspect the taper shank and spindle bore for contamination or damage before assembly, as debris on either surface will reduce runout accuracy. Do not exceed the tool manufacturer's recommended spindle speed for the loaded holder and cutter combination.