Sandvik Coromant 5749871 SNMG433-QM H13A Turning Insert

Product Description

The SANDVIK COROMANT 5749871 is a solid carbide, uncoated turning insert designed for precision metal cutting on CNC lathes and turning centers. Identified by ISO code SNMG120412QMH13A, this insert carries the H13A uncoated carbide grade and features the QM chip breaker geometry, which is engineered for stable chip control during medium to roughing turning passes on steel and stainless steel. The square SNMG insert shape provides 8 usable cutting edges per insert, reducing tooling cost per edge. With a 0.5000-inch inscribed circle and a 3/64-inch (0.0472-inch) corner radius, it suits a range of finishing and semi-finishing depths up to 0.4528 inch (11.50 mm). It is part of the T-Max P series.

This insert is primarily used in turning operations targeting steel (ISO material group P) and stainless steel (ISO material group M). Typical applications include external and internal turning on production and job-shop lathes where consistent chip evacuation and edge durability are priorities. The neutral hand orientation makes it suitable for a wide range of toolholder configurations. Installation and toolholder selection should be matched to the SNMG insert style and the clamp-and-pin holding method specified for this insert.

Key Features

• H13A uncoated solid carbide grade for dry or minimal-coolant cutting on steel and stainless steel
• QM chip breaker geometry for reliable chip control in medium to rough turning passes
• 8 cutting edges per insert from the 90-degree square shape, maximizing edge economy
• 0.5000-inch inscribed circle and 3/16-inch insert thickness for rigid seating in compatible toolholders
• Maximum depth of cut 0.4528 inch (11.50 mm) suitable for semi-finishing and medium roughing
• Clamp and pin holding method for secure insert retention under interrupted and continuous cuts

Compatibility

Designed for use in toolholders that accept SNMG-style inserts with a clamp-and-pin holding method, consistent with the T-Max P series toolholder platform. Primary workpiece material compatibility is steel (ISO P) and secondary is stainless steel (ISO M).

Installation Notes

Insert replacement should be performed by a qualified machinist or tooling technician with the machine in a full stop and all axes locked out per shop lockout/tagout procedures. Use the appropriate torque wrench and seating tools specified for the T-Max P toolholder being used — do not seat the insert by hand pressure alone. Inspect the insert pocket and pin for wear or debris before seating a fresh insert. Confirm chip breaker orientation and insert hand match the programmed toolpath before resuming cutting.