Iscar 5507878 SOMT16DT IC808 Indexable Drill Insert Square

Product Description

The ISCAR 5507878 is a square indexable drill insert in the SOMT16DT style, manufactured from solid carbide with a PVD-applied IC808 grade coating. It is designed for use in indexable twist drill bodies within the DR-TWIST series. With a 16 mm (0.6299 inches) inscribed circle, a 0.2189-inch thickness, and a 1.2 mm corner radius, this insert delivers consistent cutting geometry across a wide range of workpiece materials. Installation is performed by machinists and toolroom technicians setting up multi-insert drilling operations on CNC or manual machining equipment.

This insert is rated for universal workpiece material compatibility, covering ISO material groups H, K, M, P, and S, placing it within the P15-P30 material grade range. It is suited for production drilling applications in general machining, aerospace component work, and steel fabrication where consistent hole quality and insert indexability are required. The 90-degree included angle and square shape make it appropriate for flat-bottomed or standard through-hole drilling operations using compatible DR-TWIST series drill bodies.

Key Features

• IC808 PVD-coated solid carbide grade rated for P15-P30 material range
• 16 mm inscribed circle (0.6299 inches) with square SOMT geometry
• 1.2 mm corner radius for controlled edge engagement
• DT chipbreaker designation for chip management during drilling
• Universal material compatibility across ISO groups H, K, M, P, and S
• Conforms to ISO 13399 insert identification standards

Compatibility

Designed for use in ISCAR DR-TWIST series indexable drill bodies that accept SOMT16 style inserts with insert size code 16. Confirm holder pocket specifications and clamping compatibility before installation.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist with the spindle locked out and the machine in a safe, de-energized state. Use the correct torque wrench and insert screw specified by the drill body manufacturer to seat the insert properly — do not overtighten or use improvised tooling. Inspect the pocket seating surface for debris or wear before placing a new insert. Follow the drill body manufacturer's recommended cutting parameters for feed rate and speed based on workpiece material.