Sandvik Coromant 5727717 Threading Cutting Unit Head C4

Product Description

The SANDVIK COROMANT 5727717 is a right-hand external modular threading cutting unit head designed for precision thread-turning applications on CNC lathes and turning centers. Built to Size C4 with a 50mm head length and a 27mm center-to-cutting-edge distance, this unit head belongs to the CoroThread 266 series. It accepts 266.R-16 inserts secured by a screw-clamp holding method, delivering consistent insert positioning and reliable thread form accuracy. Weighing 0.93 pounds, the head is engineered for external threading operations where repeatable setup and tight tolerances are required. This tool is typically installed by CNC machinists and toolroom technicians in production and job-shop environments.

This cutting unit head is suited for external threading on workpieces with a minimum hole diameter of 1.8504 inches. It fits into modular tooling systems that accept CoroThread 266 series heads, making it a practical choice for shops that run standardized quick-change tooling setups on CNC lathes. The right-hand cutting direction makes it compatible with conventional forward-turning spindle configurations. Typical applications include threading on ferrous and non-ferrous materials where consistent thread geometry and fast insert changeout are priorities.

Key Features

• Size C4 modular interface for compatibility with CoroThread 266 series tooling systems
• 50mm head length provides extended reach for external threading setups
• 27mm center-to-cutting-edge distance supports precise radial positioning
• Screw-clamp insert holding method ensures secure insert seating under cutting loads
• Accepts 266.R-16 inserts for external right-hand thread forms
• Right-hand cutting direction for standard forward-rotation spindle use

Compatibility

Designed for use with 266.R-16 threading inserts within the CoroThread 266 modular tooling series. Compatible with Size C4 modular tooling connections on CNC lathes and turning centers configured for external threading operations.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Before mounting or removing the cutting unit head, ensure the machine spindle is fully stopped and the control is in a safe state per the machine tool manufacturer's lockout procedure. Use the appropriate torque wrench and screw key when seating insert screws and securing the modular connection to maintain proper clamping force without damaging the interface. Verify insert orientation and cutting direction against the programmed tool path before resuming operations.