Kennametal 1157540 Milling Insert RPGB070200 KC730 Carbide

Product Description

The KENNAMETAL 1157540 is a solid carbide milling insert in the RPGB series, designed for use in rotating milling tool bodies that accept screw-held round inserts. It carries a TiN coating applied via PVD process, which improves surface hardness and wear resistance during cutting operations. The insert measures 0.3126 inches wide, 0.0937 inches thick, and features an inscribed circle of 0.3752 inches. The neutral hand orientation and 11-degree relief angle suit it to a range of milling applications. Licensed machinists and toolroom technicians typically specify this insert for ferrous and non-ferrous material removal operations requiring consistent tool life.

This insert is suited for milling operations on materials falling under C2, C3, and C4 material grades, covering a broad range of cast irons, non-ferrous alloys, and general-purpose steels. The RPGB series geometry with a round insert shape provides a large cutting edge contact area, making it appropriate for both light and moderate depth-of-cut passes. Maximum depth of cut reaches 0.3808 inches. The ISO designation is RPGB070200, and the insert is held in place by a screw-type clamping method within compatible tool bodies.

Key Features

• Solid carbide construction with PVD TiN coating for extended wear resistance
• Round insert shape (RPGB series) provides continuous cutting edge geometry
• 11-degree relief angle supports clean chip clearance during milling
• Screw-held mounting method ensures secure, repeatable insert positioning
• Maximum depth of cut of 0.3808 inches suits a range of milling passes
• Neutral hand orientation compatible with standard RPGB tool body configurations

Compatibility

Designed as an OEM-style replacement or standard service insert for milling tool bodies accepting RPGB-series round inserts with a screw-type holding method. Refer to the ISO code RPGB070200 when cross-referencing compatible holders.

Installation Notes

Insert replacement should be performed by a qualified machinist or toolroom technician with the machine powered down and locked out per applicable lockout/tagout procedures. Use the correct torx or hex key specified by the tool body manufacturer when seating the clamping screw — do not overtighten. Inspect the insert pocket and clamping screw for wear or debris before seating a new insert. Handle solid carbide inserts carefully to avoid chipping the cutting edge prior to use.