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The SANDVIK COROMANT 5736021 is a solid carbide cutoff insert designed for parting and grooving operations on CNC lathes and turning centers. Manufactured to grade 1125 with a PVD-applied TiAlN coating, this insert delivers controlled chip formation and extended tool life in medium to high-speed turning applications. The insert features a 3.00 mm cutting width, a neutral lead angle, and a 0.30 mm corner radius, making it well suited for consistent, repeatable parting cuts. Machinists and CNC operators install this insert as a replacement consumable in compatible CoroCut 1-2 series toolholders.
This insert is part of the CoroCut 1-2 series and is intended for use in parting and grooving toolholders that accept the G seat size with clamp-style holding. It is commonly used in production turning environments handling steel, stainless, and similar materials where chip control and surface finish at the cut-off face are critical. The CR chipbreaker geometry supports efficient chip evacuation during deep parting operations, with a maximum depth of cut reaching 18.80 mm (0.7402 inches). This insert suits both job shop and production floor applications where consistent insert changeover is required.
Designed for use in CoroCut 1-2 series toolholders that accept insert seat size G and use a clamp-style holding method. The catalog number for this insert is N123G2-0300-0003-CR 1125. Confirm toolholder seat size and clamping style before ordering.
Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine before changing inserts. Seat the insert fully into the pocket and verify the clamp is torqued per the toolholder manufacturer specifications before resuming operations. Inspect the insert seat and clamp for wear or debris prior to each insert change to maintain positioning accuracy.
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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