Sandvik Coromant 5916221 Ceramic Turning Insert Rpgn

Product Description

The SANDVIK COROMANT 5916221 is an uncoated ceramic turning insert designed for high-speed metal cutting applications in CNC and conventional turning operations. Featuring a round insert shape (Shape Code R) with an ISO designation of RPGN120400E 6060, this insert carries a 1/2 inch (0.5000 inch) inscribed circle and a thickness of 3/16 inch (0.1875 inch). The Manufacturer Grade 6060 ceramic substrate is suited for demanding cutting conditions where heat resistance and hardness are priorities. Clamp-type holding secures the insert in compatible toolholders, and the bright uncoated finish is retained to preserve the ceramic cutting edge geometry.

This insert is intended for use in turning centers and lathe setups where ceramic tooling is specified for high-temperature alloys, hardened steels, or cast iron. The RPGN insert style with an 11-degree relief angle and G tolerance code suits precision turning applications requiring consistent dimensional output. Machinists and tooling specialists working in aerospace, automotive, and general metalworking environments will find this insert applicable across a range of roughing and finishing passes where ceramic grades are preferred over carbide.

Key Features

• Round insert shape (Code R) with 1/2 inch inscribed circle for versatile tool path engagement
• Uncoated ceramic construction (Grade 6060) for high-temperature cutting resistance
• 3/16 inch insert thickness (4.76 mm) providing structural rigidity during interrupted and continuous cuts
• 11-degree relief angle (Clearance Code P) reduces flank wear in precision turning
• Clamp-type insert holding method for secure seating in compatible RPGN toolholders
• No chip breaker geometry (Code N) - suited for applications where full-face ceramic engagement is required

Compatibility

Designed as an OEM-style replacement ceramic turning insert for use in RPGN-style clamp toolholders accepting a size 43 round insert with a 1/2 inch inscribed circle and 3/16 inch thickness.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the machine fully powered down and the spindle locked before insert exchange. Inspect the toolholder pocket and clamping screw for wear or debris prior to seating the insert. Ceramic inserts are brittle - avoid dropping or striking the cutting edge during handling. Follow the toolholder manufacturer torque guidelines for the clamping screw to prevent insert cracking or improper seating.