Sandvik Coromant 5751123 Indexable Boring Cartridge

Product Description

The SANDVIK COROMANT 5751123 is an indexable boring cartridge engineered for internal turning and boring operations. It belongs to the CoroTurn 107 series and accepts TCMT 21.51 inserts, making it a go-to toolholder for precision bore finishing on CNC lathes and turning centers. The cartridge has a right-hand cutting direction and a minimum bore diameter of 0.5906 inches (15.00 mm). With a toolholder style designation of STFCR and a package weight of 0.13 pounds, this cartridge is suited for machinists and toolroom professionals performing tight-tolerance internal diameter work on a range of materials.

This cartridge is designed for boring applications where consistent insert indexing and secure clamping are required. It is used in production and job-shop environments on CNC turning centers handling small to medium bore diameters. The CoroTurn 107 series is a common platform in shops running TCMT-style inserts, and the 5751123 fits directly into that tooling system. Typical applications include finish boring of housings, bushings, and hydraulic components where bore geometry and surface finish tolerances are critical.

Key Features

• Minimum bore diameter of 0.5906 inches (15.00 mm) for small-bore internal turning
• Right-hand cutting direction for standard lathe spindle rotation
• Compatible with TCMT 21.51 insert style for broad insert availability
• STFCR toolholder style designation for consistent setup and replacement
• Part of the CoroTurn 107 series, a widely used indexable boring platform
• Compact cartridge form factor at 3.27 inches length, 1.18 inches height, and 1.18 inches width

Compatibility

Compatible with TCMT 21.51 inserts. Designed for use within the CoroTurn 107 series tooling system on CNC lathes and turning centers configured for right-hand boring operations with STFCR-style cartridge seats.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with indexable turning toolholders. Power down and lock out the machine spindle before cartridge installation or insert indexing. Follow the machine tool manufacturer guidelines and the toolholder manufacturer torque specifications for clamping screws when seating the cartridge and securing the insert. Verify bore diameter clearance and overhang before engaging the workpiece to avoid interference or chatter.