Kennametal 3641490 Shell Mill Holder CAT40 0.5 Inch Pilot

Product Description

The KENNAMETAL 3641490 is a CAT40 taper shank shell mill holder designed for securing shell mill cutters in machining center spindles. With a 0.5-inch pilot diameter and a 1.4400-inch nose diameter, this holder provides a rigid, concentric interface between the spindle and the cutter body. The projection from flange to nose end measures 3.5000 inches, giving machinists a defined gage length for setups. A key feature is dual-path coolant delivery: through-spindle and DIN flange coolant ports direct cutting fluid to the tool zone for improved chip evacuation and tool life. The lock screw thread is sized at 1/4-28. Total weight is 3.127 pounds.

This holder is suited for milling operations on CNC vertical and horizontal machining centers equipped with CAT40 spindle tapers. Typical applications include face milling, shoulder milling, and high-feed milling passes in ferrous and non-ferrous materials where consistent cutter runout and coolant access are critical. The DIN flange coolant feature makes this holder well matched to spindle interfaces that supply coolant through both the spindle bore and the flange face simultaneously. It is used in job shops and production machining environments that run coolant-through tooling programs.

Key Features

• CAT40 taper shank for direct mounting in CAT40 machining center spindles
• 0.5-inch (1/2 inch) pilot diameter for positive shell mill cutter registration
• Dual coolant delivery via through-spindle and DIN flange ports
• 3.5000-inch flange-to-nose projection for predictable gage-length setup
• 1/4-28 lock screw thread for secure axial cutter retention
• 1.4400-inch nose diameter accommodates standard shell mill arbor bores

Compatibility

Designed as an OEM-style shell mill holder for CAT40 spindle taper machining centers that support through-spindle and DIN flange coolant delivery.

Installation Notes

Installation and removal should be performed by a qualified machinist or tooling technician with the spindle fully de-energized and locked out per OSHA lockout/tagout procedures. Use a calibrated torque wrench on the drawbar and lock screw to manufacturer specifications — do not rely on hand-tight engagement alone. Inspect the taper shank and spindle bore for nicks, chips, or contamination before seating; even minor surface damage can affect runout and cutter concentricity. Verify coolant port alignment with the spindle's coolant delivery channels before cycling the machine.