Sandvik Coromant 5724189 Turning Insert CCMT21.52-UM 1125

Product Description

The SANDVIK COROMANT 5724189 is a solid carbide turning insert in the CCMT style, designed for external turning operations on CNC lathes and turning centers. It carries the manufacturer grade 1125 with a PVD-applied TiAlN and AlCr2O3 dual-layer coating that supports cutting performance in steel and stainless steel applications. The insert features an 80-degree diamond shape, a UM chip breaker geometry, and a neutral hand orientation. With an inscribed circle of 0.25 inches and a corner radius of 0.0313 inches, it is suited for medium to light finishing passes. This insert belongs to the CoroTurn 107 series and is installed by machining professionals, toolroom technicians, and CNC operators.

This insert is intended for turning steel and stainless steel workpieces in production and job-shop environments. The UM chip breaker geometry is optimized for light to medium finishing cuts where controlled chip formation and surface finish consistency are priorities. The screw-clamping hold method is compatible with CoroTurn 107 toolholders that accept CCMT-style inserts with a clearance code C and tolerance code M. It is applicable in both roughing setups with appropriate depth-of-cut adjustments and in finish-turning passes on ferrous materials coded P and M under ISO material classification.

Key Features

• PVD-coated with TiAlN and AlCr2O3 for wear resistance on steel and stainless steel
• 80-degree diamond insert shape (Shape Code C) provides a strong cutting edge with good approach angle flexibility
• UM chip breaker geometry supports controlled chip evacuation during finishing operations
• Screw insert holding method ensures secure seating in CoroTurn 107 compatible toolholders
• Two cutting edges per insert for extended tool life per unit
• Neutral hand orientation allows use in both right-hand and left-hand toolholder configurations

Compatibility

Designed for use in CoroTurn 107 series toolholders that accept CCMT-style inserts with a clearance code C, tolerance code M, and screw clamping. ISO code for this insert is CCMT 06 02 08-UM 1125. Primary workpiece material is steel (ISO code P); secondary workpiece material is stainless steel (ISO code M).

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machine spindle before seating or replacing inserts. Use the correct Torx or hex key specified by the toolholder manufacturer to tighten the clamping screw — do not over-torque or under-torque the fastener. Inspect the insert pocket and locating surfaces for chips or debris before seating the insert to ensure full contact and accurate indexing.