Sandvik Coromant 5731581 Indexable Boring Bar Solid Carbide

Product Description

The SANDVIK COROMANT 5731581 is a solid carbide indexable boring bar from the CoroTurn 111 series, designed for precision internal boring and turning operations on CNC lathes and machining centers. The bar features a 5/16-inch shank diameter (7.94 mm), a 5-inch overall length, and a minimum bore diameter of 10.5 mm (0.4134 inches). Screw clamping secures a single CPMT 21.51 insert with a positive rake angle of 2 degrees, promoting clean chip formation and reduced cutting forces. Coolant-through capability supports extended tool life in demanding applications. This toolholder is installed by machinists and CNC setup technicians working in precision metalcutting environments.

This boring bar suits small-diameter internal turning and boring applications in both production and job-shop settings. The right-hand cut orientation and E-SCLP toolholder style make it appropriate for conventional lathe setups where the bar is fed from right to left. The 2-degree lead angle and positive rake geometry are suited for finishing and semi-finishing passes in ferrous and non-ferrous materials. The multi-use design supports both boring and turning operations, reducing the number of toolholders required in a setup.

Key Features

• Solid carbide construction for maximum rigidity in small-bore applications
• Minimum bore diameter of 10.5 mm (0.4134 inches) for tight internal geometries
• Coolant-through capability to manage heat and chip evacuation at the cutting edge
• Screw clamping insert retention for secure, repeatable insert indexing
• Positive rake geometry (2-degree rake angle, 2-degree lead angle) reduces cutting forces
• Multi-use design supports both boring and internal turning in a single toolholder

Compatibility

Compatible with CPMT 21.51 series inserts (1/4-inch inscribed circle, 3/32-inch thickness). Part of the SANDVIK COROMANT CoroTurn 111 series. Catalog reference: E05K-SCLPR 2-R.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Confirm the machine spindle and turret are fully powered down and locked out before mounting or removing the boring bar. Secure the shank in a properly sized boring bar holder or turret block to the machine manufacturer's specified clamping torque range. Verify insert seating and screw torque per the insert manufacturer's guidelines before resuming cuts.