Sandvik Coromant 6138405 Threading Toolholder 1x1 Inch

Product Description

The SANDVIK COROMANT 6138405 is an indexable threading toolholder designed for external thread cutting on CNC lathes and turning centers. Part of the CoroThread 266 series, it features a right-hand orientation and a square steel shank measuring 1 inch wide by 1 inch tall. The overall length is 6 inches, with a head length of 0.9213 inches and a back-of-bar to cutting edge distance of 1.02 inches. The insert is secured via a screw-clamp holding method, providing consistent clamping force and repeatable insert positioning. This toolholder is suited for production threading operations where dimensional accuracy and insert change efficiency are priorities.

The 6138405 is intended for external threading applications on ferrous and non-ferrous workpieces in turning operations. The 1 x 1 inch shank fits standard square-shank tool posts and quick-change tooling systems common in both manual and CNC lathe setups. It accepts 266.RG to 16 series inserts, making it a working component within the broader CoroThread 266 tooling system. Typical users include machinists and toolroom technicians running production or job-shop threading operations in industrial manufacturing environments. Coolant-through capability is not included with this holder.

Key Features

• CoroThread 266 series external threading toolholder with right-hand cutting orientation
• 1 x 1 inch square steel shank for compatibility with standard tool posts
• Screw-clamp insert holding method for secure, repeatable insert seating
• Compatible with 266.RG to 16 series threading inserts
• 6-inch overall length with 1.02-inch back-of-bar to cutting edge dimension
• Steel construction for rigidity and durability in continuous threading cycles

Compatibility

Designed for use with 266.RG to 16 series indexable threading inserts within the SANDVIK COROMANT CoroThread 266 tooling system. Fits standard 1 x 1 inch square-shank tool posts on CNC and manual lathes.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Secure the shank fully in the tool post to the recommended clamping depth before engaging the workpiece. Confirm insert seating and screw torque according to the insert manufacturer guidelines before running. Inspect the insert and clamping screw for wear or damage at each insert change interval.