Sandvik Coromant 5758099 Threading Toolholder 1-1/4 in

Product Description

The SANDVIK COROMANT 5758099 is an indexable threading toolholder designed for both internal and external thread cutting operations on CNC lathes and turning centers. Part of the CoroThread 266 series, it accepts 266RG to 22 inserts secured by a screw-clamping method. The right-hand toolholder features a 1.25 inch round shank with a 30 mm (1.181 inch) shank height and a 14 inch overall length. Built from steel, it includes coolant-through capability to aid chip evacuation and extend insert life during threading passes. This toolholder suits machinists and CNC operators working in production or job-shop turning environments.

The 5758099 is suited for threading applications on lathes where both internal and external profiles are required from a single toolholder setup. The minimum bore diameter of 1.58 inches defines the smallest bore it can reach for internal threading work. A head length of 3.75 inches and a center-to-cutting-edge distance of 22 mm (0.866 inch) provide the reach and geometry needed for consistent thread profiles. It is typically installed by CNC machinists, tool-and-die professionals, and precision turning specialists working with ferrous and non-ferrous materials.

Key Features

• Handles both internal and external threading from a single right-hand toolholder
• Compatible with 266RG to 22 indexable inserts using screw-type insert holding
• Coolant-through design supports chip control and thermal management during threading
• Steel construction provides rigidity for consistent thread form accuracy
• 14 inch overall length with a 3.75 inch head length for extended reach applications
• Part of the CoroThread 266 series for broad insert availability

Compatibility

Designed for use with 266RG to 22 series indexable threading inserts. Toolholder style is 266RFG. Verify insert geometry and thread profile requirements before pairing with specific insert grades.

Installation Notes

Installation is performed by CNC machinists or qualified turning center operators. Power down and lock out the machine spindle before mounting or removing the toolholder from the turret. Use the appropriate torque wrench and insert screw driver per the machine tool and insert manufacturer guidelines when seating the clamping screw. Confirm coolant-through line connection and flow before beginning threading operations.