Sandvik Coromant 5721496 Indexable Boring Bar 0.5in Rh

Product Description

The SANDVIK COROMANT 5721496 is an indexable boring bar from the CoroTurn 107 series, designed for precision internal boring and turning operations on CNC lathes and machining centers. It features a 3/8-inch shank diameter, a 6-inch overall length, and a minimum bore diameter of 0.5 inches. The toolholder is manufactured from steel with a neutral rake angle, accepting TCMT 221 triangular inserts secured via screw clamping. Coolant-through capability supports chip evacuation and thermal control during continuous cuts. This bar is suited for machinists and toolroom technicians working in production or job-shop environments.

The A06M-STFCR2-B1 is engineered for both boring and turning applications, making it a versatile single-toolholder solution. Its right-hand cutting orientation and neutral rake geometry make it appropriate for a wide range of workpiece materials when paired with the correct TCMT 221 insert grade. The 0.25-inch center-to-cutting-edge dimension and compact shank profile allow it to reach into tight bore entries. Typical installation is in a static or live toolholder on a lathe turret, where precise shank clamping and insert torque are critical to dimensional repeatability.

Key Features

• CoroTurn 107 series toolholder style A-STFC with neutral rake and 0-degree lead angle
• Minimum bore diameter of 0.5 inches (12.70 mm) for small-bore internal machining
• Screw clamping insert retention for secure, repeatable TCMT 221 insert indexing
• Coolant-through design to improve chip control and extend insert life
• Multi-use capability covering boring and turning in a single toolholder
• Steel construction with 6-inch overall length and 3/8-inch shank and neck diameter

Compatibility

Accepts TCMT 221 triangular inserts with a 0.25-inch inscribed circle and 0.125-inch thickness. Designed as a direct-fit toolholder for CoroTurn 107 series insert grades. Compatible with any machine tool spindle or turret that accepts a 3/8-inch straight shank boring bar.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician with the machine in a locked-out, zero-energy state before toolholder exchange. Secure the shank firmly in the boring bar holder using appropriate clamping torque per the machine tool manufacturer specification. Verify insert seating and screw clamp engagement before resuming cutting operations. When using coolant-through capability, confirm that coolant lines are connected and flow is confirmed before initiating the cut.