Sandvik Coromant 5745934 Milling Insert Grade 3040 R390

Product Description

The SANDVIK COROMANT 5745934 is a solid carbide milling insert in the R390 series, designed for use in square-shoulder and face milling applications. It carries a CVD-applied TiCN and Al2O3 coating under manufacturer grade 3040, targeting steel, cast iron, and hard material workpieces. The insert features a parallelogram shape with a positive 5-degree rake angle, a KM chip breaker, and two cutting edges. At 6.33 mm thick with an 11.00 mm inscribed circle and a 1.20 mm corner radius, it is sized for moderate-to-aggressive material removal in precision machining environments. Licensed machinists and CNC tooling specialists are the primary installers.

This insert is suited for use in R390-series milling cutters on CNC machining centers handling steel (P20), cast iron (K30), and hard materials (H25). Typical applications include shoulder milling, pocket milling, and ramping operations where controlled chip formation and surface finish consistency are required. The KM chip breaker geometry supports stable cutting across a range of feed rates and axial depths up to 16.00 mm. The right-hand cutting orientation must be matched to the cutter body configuration before installation.

Key Features

• CVD-coated TiCN and Al2O3 multilayer coating for wear resistance across P, K, and H material groups
• Positive 5-degree rake angle reduces cutting forces in steel and cast iron operations
• KM chip breaker geometry promotes controlled chip evacuation at moderate to aggressive feeds
• Two cutting edges per insert extend usable tool life per unit
• Corner-rounded cutting edge style at 1.20 mm radius reduces insert chipping at entry and exit
• Screw-held mounting method ensures repeatable seating in compatible cutter bodies

Compatibility

Compatible with M-40 and R390 cutter series. ANSI and ISO code: R390-18 06 12M-KM 3040. Insert size code 180612 applies. Verify cutter body pocket geometry and hand orientation before installation.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. The machine spindle must be fully stopped and locked out before handling or indexing inserts. Use the manufacturer-specified torx or hex key to seat the clamping screw to proper engagement without overtightening, which can fracture the carbide body. Confirm insert seating and edge runout with a dial indicator before resuming cutting operations.