Parlec C50-12SM3 Shell Mill Holder CAT50 1.25 in Pilot

Product Description

The PARLEC C50-12SM3 is a CAT50 taper shank shell mill holder designed for use on vertical and horizontal machining centers. It accepts shell mills with a 1.25-inch pilot diameter and features a 2.75-inch nose diameter with a 3.5-inch projection from flange to nose end. The holder is balanced to 30,000 RPM, making it suitable for high-speed milling applications. Lock screw thread size is 5/8-18, compatible with the included 12LS lock screw. TIR is rated at 0.0002 inch, supporting accurate, repeatable cutter positioning. Installed by machinists and CNC toolroom technicians, this holder is a standard production tooling component for face milling and surface milling operations.

This shell mill holder is suited for production machining environments where CAT50 spindle tooling is required. It supports shell mill cutting diameters in the 3-inch to 3.5-inch range. Typical applications include face milling of ferrous and non-ferrous workpieces on full-size vertical machining centers and horizontal machining centers equipped with CAT50 spindles. The high-RPM balance rating makes it a practical choice for shops running aggressive feed rates or high-spindle-speed finishing passes.

Key Features

• CAT50 taper shank for direct spindle mount on CAT50 machining centers
• 1.25-inch pilot diameter supports shell mills in the 3-inch to 3.5-inch cutting diameter range
• 2.75-inch nose diameter with 3.5-inch flange-to-nose projection
• Balanced to 30,000 RPM for high-speed milling applications
• TIR of 0.0002 inch for precise cutter runout control
• 5/8-18 lock screw thread with 12LS lock screw included

Compatibility

Designed as an OEM-style shell mill holder for machining centers with CAT50 spindle interfaces. Compatible with shell mills requiring a 1.25-inch pilot, covering cutting diameter ranges of 3 inches to 3.5 inches.

Installation Notes

Installation should be performed by a qualified machinist or CNC toolroom technician. Power down and lock out the machining center spindle before mounting or removing toolholders. Use a calibrated torque wrench and the appropriate spanner or drive key when securing the lock screw to avoid damaging the pilot bore or cutter seat. Verify TIR at the cutter after assembly using a dial test indicator before beginning any cutting operation.