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The SANDVIK COROMANT 5736421 is a solid carbide grooving insert designed for precision groove-turning operations in metalworking applications. Part of the CoroCut 3 series, this insert features a TiAlN coating applied via PVD process, delivering improved wear resistance and thermal stability at the cutting edge. The neutral hand orientation and RS chip breaker geometry support consistent chip control across a range of materials. With a 1 mm cutting width and a maximum depth of cut of 2.2 mm, this insert suits fine-detail grooving where dimensional accuracy is critical. Licensed machinists and CNC turning center operators are the primary installers.
This insert is suited for external and face grooving operations on CNC lathes and turning centers in both production shop and job-shop environments. The CoroCut 3 platform targets applications requiring narrow, precise grooves in ferrous and non-ferrous workpiece materials. The positive rake geometry and RS chip breaker work together to reduce cutting forces and manage chip evacuation in these tight-clearance cuts. The N123T3 insert style and T seat size must be matched to a compatible CoroCut 3 toolholder for proper seating and clamping.
Designed for use with SANDVIK COROMANT CoroCut 3 series toolholders accepting N123T3 insert style with T seat size. ISO code N123T3-0100-RS 1125 should be used to confirm holder and insert matching.
Installation is performed by a qualified machinist or CNC setup technician. The machine spindle must be stopped and all motion arrested before changing inserts. Use the correct torque wrench and clamping screw specified for the CoroCut 3 toolholder to seat the insert properly — do not overtighten by feel alone. Inspect the insert pocket and seating surface for chips or debris before seating the new insert.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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