Seco 75005070 Minimaster Milling Shank 5/8 in Keyway MM12

Product Description

The SECO 75005070 is a replaceable tip milling shank from the Minimaster series, designed to accept MM12-style interchangeable milling tip heads. The shank features a 5/8 inch (0.625 inch) straight keyway configuration with a Weldon flat for secure toolholder engagement. With an overall length of 2.56 inches and a neck diameter of 0.508 inches, this shank provides a 17 mm (0.669 inch) head projection suited for applications requiring controlled reach and rigidity. It is installed by machinists and tooling technicians in CNC milling operations where quick tip changes and consistent runout are critical.

This shank is used in CNC milling setups requiring the Minimaster MM12 tip system. The 17 mm projection and 0.625 inch shank diameter make it appropriate for light to moderate material removal operations in both production and job-shop environments. The Weldon flat on the shank ensures positive drive retention in standard side-lock toolholders, reducing tip pullout risk during cutting.

Key Features

• Minimaster MM12 tip interface accepts interchangeable milling heads for quick changeovers
• 5/8 inch (0.625 inch) straight shank with Weldon flat for positive side-lock retention
• 17 mm projection providing controlled reach with minimal overhang
• Neck diameter of 0.508 inches for clearance in close-tolerance applications
• Overall length of 2.56 inches in a compact, rigid profile
• Effective cutting length of 0.602 inches with maximum diameter of 0.625 inches

Compatibility

Designed for use with the Seco Minimaster MM12 series replaceable milling tip heads. The 5/8 inch keyway shank fits standard side-lock toolholders configured for Weldon flat retention.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Secure the shank in a compatible side-lock toolholder by tightening the set screw against the Weldon flat before mounting in the spindle. Ensure the machine spindle is fully stopped and the control is in a safe state before installing or removing the shank or tip. Follow the machine tool manufacturer and toolholder manufacturer torque guidelines for set screw engagement.