Sandvik Coromant 5748688 Turning Insert SCMT32.51-MF

Product Description

The SANDVIK COROMANT 5748688 is a solid carbide turning insert in the SCMT geometry, designed for external turning operations on CNC lathes and turning centers. It carries the manufacturer grade 1125 with a dual-layer TiAlN and AlCr2O3 coating applied by a PVD process, delivering wear resistance and thermal stability in demanding cuts. The insert measures 3/8 inches in length with a 3/8-inch inscribed circle, a 5/32-inch thickness, and a 1/64-inch corner radius. Four usable cutting edges per insert are available through a neutral hand orientation and screw-type clamping. This is part of the CoroTurn 107 series, suited for light to medium finishing and semi-finishing passes.

This insert is primarily rated for steel workpieces and secondarily suited for stainless steel, superalloys, and titanium, covering ISO material codes P, M, and S. The SCMT geometry with a 90-degree included angle and 7-degree relief angle is a common choice for profiling and longitudinal turning. The MF chip breaker designation indicates it is optimized for light finishing cuts where consistent chip control and edge stability are critical. Typical applications include precision diameter turning, facing, and light profiling on both manual and CNC setups in production and job-shop environments.

Key Features

• Grade 1125 solid carbide substrate with PVD-applied TiAlN and AlCr2O3 dual-layer coating
• MF chip breaker geometry optimized for light finishing and semi-finishing cuts
• Four cutting edges per insert via neutral hand, screw-held SCMT configuration
• 1/64-inch (0.0156-inch) corner radius for tight-tolerance finishing work
• 90-degree square insert shape (ISO code SCMT 09 T3 04-MF 1125) for rigid, predictable engagement
• Compatible with primary workpiece material steel and secondary materials stainless steel, superalloy, and titanium

Compatibility

Designed for use in CoroTurn 107 series toolholders that accept SCMT-style inserts with a screw-clamp holding method and C clearance, M tolerance designation. ISO code SCMT 09 T3 04-MF 1125 identifies compatible toolholder pockets. Verify toolholder insert seat geometry and screw torque requirements before installation.

Installation Notes

This insert is installed by a machinist or CNC setup technician using the appropriate Torx or hex key for the clamping screw specified by the toolholder manufacturer. Ensure the machine spindle is stopped and the turret is in a safe indexed position before changing inserts. Seat the insert fully and evenly in the pocket before tightening the clamping screw; an improperly seated insert can fracture under cutting load. Inspect the insert pocket and clamping screw for wear or damage each time an insert is rotated or replaced.