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The SANDVIK COROMANT 5736629 is a solid carbide cutoff insert designed for parting and grooving operations on CNC lathes and turning centers. It carries the N123U3 insert style designation and belongs to the CoroCut 3 series, engineered for stable, narrow-groove parting with a 2.00 mm (0.0787 inch) cutting width. The insert features a CM chipbreaker geometry and a TiAlN coating applied via PVD process, providing heat resistance and edge durability in a wide range of workpiece materials. A neutral lead angle and 7-degree relief angle support clean, consistent chip formation during cutoff cycles. Licensed machinists and CNC turning specialists install this insert in compatible CoroCut 3 toolholders.
This insert is suited for parting, grooving, and cutoff applications on bar stock, turned components, and workpieces requiring narrow slot widths. The 2.00 mm cutting width and 6.40 mm maximum depth of cut make it a practical choice for small- to medium-diameter workpieces in production and job-shop turning environments. The CM chipbreaker geometry is optimized to control chip flow in both light and moderate feed conditions. This insert is typically used in horizontal and vertical CNC turning centers by machining professionals and toolroom technicians.
Designed as a direct-fit replacement insert for CoroCut 3 series toolholders accepting N123U3 insert style with a U seat size. Catalog reference: N123U3-0200-0001-CM 1125.
Installation is performed by qualified CNC machinists or toolroom technicians following the toolholder manufacturer's clamping procedure. Ensure the machine spindle is fully stopped and the toolholder is removed or secured before seating or replacing inserts. Use the correct insert clamp key to achieve proper seating in the pocket — do not overtighten or force the clamp. Inspect the insert pocket for debris or wear before installing a new insert to ensure accurate seating and edge position.
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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