Sandvik Coromant 5757845 Threading Toolholder 1/2 Inch

Product Description

The SANDVIK COROMANT 5757845 is an indexable threading toolholder designed for external thread-cutting operations on CNC lathes and turning centers. Built to the CoroThread 266 series standard, this right-hand toolholder accepts 266RG to 16 inserts secured by a screw-clamp holding method for reliable repeatability under cutting loads. The shank measures 0.5 inches wide by 0.5 inches tall with an overall length of 5 inches. The steel construction handles the rigidity demands of precision threading applications. Machinists and tool-and-die professionals working with external threading operations will find this holder sized and configured for direct integration into standard turning tool blocks.

This toolholder is suited for external threading on residentially scaled and industrial CNC turning equipment where a 1/2 x 1/2 inch shank is the required interface. The CoroThread 266 series is a common platform in job shops and production environments where consistent thread form and quick insert indexing are priorities. The 3/8 inch inscribed circle insert size is appropriate for moderate-to-fine pitch threading across a range of workpiece materials. No coolant-through capability is present in this holder, so external coolant delivery should be used when thermal management is needed.

Key Features

• External thread-cutting configuration with right-hand orientation
• CoroThread 266 series platform accepts 266RG to 16 inserts
• Screw-clamp insert holding method for secure, repeatable seating
• 1/2 x 1/2 inch square shank fits standard turning tool blocks
• 5 inch overall length with 0.5 inch center-to-cutting-edge dimension
• Steel construction provides rigidity for precision threading cuts
• No coolant-through — compatible with external coolant delivery setups

Compatibility

Compatible with 266RG to 16 series indexable inserts. Designed for use within the SANDVIK COROMANT CoroThread 266 tooling system on CNC lathes and turning centers accepting a 1/2 x 1/2 inch square shank toolholder.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before seating or removing the toolholder from the turret or tool block. Ensure the tool block bore and shank surfaces are clean and free of chips before clamping. Follow the machine tool manufacturer torque specifications for toolholder clamping fasteners — do not use values not confirmed by the machine or tooling documentation.