Parlec C40-10SM4 Shell Mill Holder CAT40 1 in Pilot

Product Description

The PARLEC C40-10SM4 is a CAT40 taper shank shell mill holder designed for use on CNC machining centers. It accepts shell mill cutters with a 1 inch pilot diameter and a 2.25 inch nose diameter, providing rigid, repeatable cutter retention for face milling and shoulder milling operations. The projection from flange to nose end measures 4 inches, giving adequate clearance for most standard workholding setups. With a total indicator runout (TIR) of 0.0002 inches, this holder delivers the concentricity required for consistent surface finish and tool life in production environments. Installation requires a 1/2-20 lock screw thread for secure cutter engagement.

This shell mill holder is suited for use in job shops and production facilities running CAT40-spindle machining centers. It supports shell mill cutting diameters ranging from 2.25 inches to 2.75 inches, making it a practical choice for face milling, step milling, and shoulder milling passes on ferrous and non-ferrous workpieces. The holder is balanced to 30,000 RPM, accommodating high-speed spindle applications common in modern CNC environments. A licensed machinist or CNC tooling technician typically performs the setup and cutter changeover.

Key Features

• CAT40 taper shank for direct spindle mounting on compatible machining centers
• 1 inch pilot diameter with 2.25 inch nose diameter for secure shell mill seating
• 4 inch flange-to-nose projection for clearance in standard workholding setups
• 0.0002 inch TIR for precise concentricity and consistent cutting performance
• Balanced to 30,000 RPM for compatibility with high-speed spindle applications
• 1/2-20 lock screw thread with included lock screw (10LS) for positive cutter retention

Compatibility

Designed as an OEM-style tooling component for CAT40-spindle CNC machining centers accepting shell mills with cutting diameters between 2.25 inches and 2.75 inches and a 1 inch pilot bore.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Ensure the spindle is fully powered down and the machine is in a safe, locked-out state before mounting or removing the holder. Clean the CAT40 taper and spindle bore thoroughly before seating to ensure full contact and accurate runout. Verify lock screw engagement torque per the shop standard procedure and confirm TIR with a dial indicator before committing to production cuts.