Parlec C50-75SM3 Shell Mill Holder CAT50 0.75 Inch Pilot

Product Description

The PARLEC C50-75SM3 is a CAT50 taper shank shell mill holder designed for secure face milling and shell milling operations on CNC machining centers. The holder features a 0.75 inch pilot diameter and a 1.75 inch nose diameter, with a projection from flange to nose end of 3.5 inches. Balanced to 30,000 RPM, this holder delivers tight runout control with a TIR of 0.0002 inches, making it suitable for precision milling applications where tool concentricity directly affects surface finish and tool life. A licensed machinist or CNC setup technician handles installation and tool changes.

This shell mill holder is intended for use in vertical and horizontal CNC machining centers equipped with CAT50 spindle interfaces. It accommodates shell mill cutting diameters in the 1.75 inch to 2 inch range, covering common face mill and shell mill bodies used in general metalworking and production machining environments. The lock screw thread size is 3/8-24, and the included or compatible lock screw reference is 75LS. No through-coolant capability is present on this holder, so external coolant delivery or flood coolant must be used when machining applications require it.

Key Features

• CAT50 taper shank for direct spindle interface on CAT50-equipped machining centers
• 0.75 inch pilot diameter with 1.75 inch nose diameter to accept standard shell mill bodies
• TIR of 0.0002 inches for tight runout control and consistent tool performance
• Balanced to 30,000 RPM for high-speed machining stability
• 3/8-24 lock screw thread with 75LS lock screw compatibility
• 3.5 inch projection from flange to nose end for standard reach applications

Compatibility

Designed for use with shell mill cutting bodies in the 1.75 inch to 2 inch diameter range on CAT50 spindle machining centers. Lock screw compatibility reference is 75LS with a 3/8-24 thread size.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or CNC technician with the machine powered down and the spindle fully stopped before handling. Use a torque wrench and appropriate spanner or retention knob tools as specified by the machining center manufacturer when seating the holder in the spindle. Inspect the taper bore and holder taper for chips, burrs, or contamination before seating to ensure full contact and accurate runout. Since this holder has no through-coolant port, confirm that external coolant delivery is adequate for the cutting application before operation.