Allied Machine 11820970 Indexable Drill Insert CTPP430

Product Description

The ALLIED MACHINE AND ENGINEERING 11820970 is a solid carbide indexable drill insert designed for use in indexable drilling systems that require a center-cutting geometry. The insert features an XCNTER (XCNT) style with manufacturer grade CTPP430 and an ER chipbreaker configuration. The included angle measures 88 degrees, and the inscribed circle diameter is 0.0830 inches. With a width of 0.1570 inches and a thickness of 0.0710 inches, this insert is engineered for precision boring and drilling operations in metal-cutting applications. Installation and replacement are handled by machinists and toolroom technicians working with compatible Allied Machine indexable drill bodies.

This insert is suited for use in production drilling environments where repeatable hole quality and insert interchangeability are required. The CTPP430 grade solid carbide construction supports drilling in a range of ferrous and general-purpose metalworking applications. The ER chipbreaker geometry promotes effective chip control during through-hole and blind-hole drilling operations. The rectangular insert shape with an 88-degree included angle and a 0.0160-inch corner radius provides a stable cutting edge for center-cutting drill bodies in both CNC machining centers and manual drilling setups.

Key Features

• XCNTER (XCNT) insert style for center-cutting indexable drill bodies
• Solid carbide construction in manufacturer grade CTPP430
• ER chipbreaker for controlled chip evacuation during drilling
• 88-degree included angle with 0.0160-inch corner radius
• Insert size 040104 with 0.1570-inch width and 0.0710-inch thickness
• Inscribed circle diameter of 0.0830 inches for precise seating

Compatibility

Designed as an OEM-style replacement indexable drill insert for Allied Machine and Engineering indexable drill bodies requiring XCNTER-style, rectangular inserts in CTPP430 grade with an 040104 insert size designation.

Installation Notes

Insert replacement is performed by a machinist or toolroom technician. Disengage the machine spindle and ensure the drill body is fully secured and the machine is powered down before removing or seating inserts. Use the appropriate torx or insert-clamping key specified for the drill body to achieve correct seating torque per the drill body manufacturer documentation. Inspect the insert pocket for wear or damage before installing a new insert.