Parlec C50-75SM5 Shell Mill Holder CAT50 0.75 Inch Pilot

Product Description

The PARLEC C50-75SM5 is a CAT50 taper shank shell mill holder designed for use in CNC machining centers. It accepts shell mill cutters and transmits torque through a precision pilot and face contact interface. The holder features a 0.75 inch pilot diameter, a 1.75 inch nose diameter, and a 5.5 inch projection from flange to nose end. With a TIR of 0.0002 inches and a balance rating to 30,000 RPM, it is suited for high-speed, precision milling operations. Machinists and toolroom technicians install this holder to mount shell mills ranging from 1.75 to 2 inches in cutting diameter.

This shell mill holder is intended for use in vertical and horizontal CNC machining centers equipped with CAT50 spindle tapers. Typical applications include face milling, shoulder milling, and surface finishing operations in production and job shop environments. The 5.5 inch flange-to-nose projection suits setups requiring clearance between the spindle face and the workpiece or fixture. Lock screw thread size is 3/8-24, compatible with the included 75LS lock screw.

Key Features

• CAT50 taper shank for direct mounting in CAT50-spindle machining centers
• 0.75 inch pilot diameter with 1.75 inch nose diameter for positive shell mill registration
• 5.5 inch projection from flange to nose end provides workpiece clearance
• TIR of 0.0002 inches supports tight tolerance and finish milling work
• Balanced to 30,000 RPM for compatibility with high-speed spindle applications
• 3/8-24 lock screw thread size with 75LS lock screw
• No through-coolant configuration - suitable for flood or mist coolant setups

Compatibility

Designed for CNC machining centers with CAT50 spindle tapers. Accepts shell mill cutters with a 0.75 inch pilot bore in the 1.75 to 2 inch cutting diameter range.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician following the machine tool manufacturer guidelines. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before mounting or removing the holder. Clean the CAT50 taper and spindle bore thoroughly before seating the holder to prevent runout caused by chips or contamination. Torque the retention knob to the spindle manufacturer specification and verify TIR with a dial indicator before production use.