Sandvik Coromant 8247091 Indexable Turning Toolholder

Product Description

The SANDVIK COROMANT 8247091 is a right-hand indexable turning toolholder using a clamp-style insert holding method. It accepts CP-B1208D inserts with a compatible insert size code of 1208 and features a negative rake angle of -4 degrees, suited for stable, high-force turning operations. The shank measures 0.75 inches wide by 0.75 inches tall. With coolant-through capability and a steel toolholder body, this holder is built for production turning environments where thermal management and insert seat rigidity are priorities. It is installed by machinists and CNC turning center operators in job shop and production settings.

This toolholder fits CNC lathes and turning centers configured for the CoroTurn Prime quick-change system. It is designed for external turning applications and is suitable for both production and contract machining environments requiring consistent insert indexing and repeatable tool offsets. The right-hand cutting direction and negative rake geometry make it appropriate for roughing and semi-finishing passes on a range of workpiece materials.

Key Features

• Clamp-style insert holding for secure seating under interrupted and heavy cuts
• Coolant-through capability directs cutting fluid directly to the cutting zone
• Negative rake angle (-4 degrees) supports strong insert edges for demanding turning operations
• Steel toolholder body provides rigidity and durability in production use
• Right-hand cutting direction with 0.75 inch square shank for standard toolpost and turret mounting
• Compatible insert size code 1208 with CP-B1208D insert geometry

Compatibility

Designed for use with CP-B1208D inserts (insert size code 1208, 12.00 mm inscribed circle, 0.2362 inch thickness). Toolholder style is QS-CP-25BR/L..-12B (inch). Part of the CoroTurn Prime system platform.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the turret is indexed to a safe position before mounting or removing the toolholder. Use the appropriate torque wrench and clamp screws specified for the insert size to avoid seat damage. Verify coolant-through passages are clear and properly connected before resuming operation.