Allied 4C1YP-.386 Spade Drill Insert Letter W Solid Carbide

Product Description

The ALLIED MACHINE AND ENGINEERING 4C1YP-.386 is a solid carbide spade drill insert designed for high-performance hole-making in steel and hard materials. This insert mounts into a compatible spade drill holder and delivers precise, repeatable cutting action at a 132-degree point angle. Manufactured to the GEN2 T-A series standard, it carries an AM300 PVD coating for extended tool life and thermal resistance. At 0.386 inches in diameter (Letter W) and 0.0938 inches thick, it is built to tight tolerances for consistent entry and chip evacuation in demanding production environments. Machinists and tool-room professionals specify this insert for applications where carbide grade C1 (K35) provides the right balance of hardness and toughness.

This insert is suited for drilling operations in steel and hard material workpieces in CNC machining centers, drill presses, and production turning operations. The GEN2 T-A series is a common platform in job shop and manufacturing environments where interchangeable spade drill inserts reduce tooling inventory. The Letter W diameter and Y seat size designation identify the correct holder pairing for this insert in that platform.

Key Features

• Solid carbide construction, grade C1 (K35) for hardness and wear resistance in steel and hard materials
• AM300 PVD coating for improved heat resistance and extended cutting life
• 132-degree point angle for reduced thrust and accurate hole entry
• Letter W diameter (0.386 inches) with Y seat size for GEN2 T-A holder compatibility
• 0.0938 inch insert thickness for precise fitment in the holder pocket

Compatibility

Designed for use with GEN2 T-A series spade drill holders requiring a Y seat size. Verify holder seat size and series designation before installation.

Installation Notes

Insert installation and changeout should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before accessing the holder pocket. Seat the insert fully and evenly in the pocket before torquing the clamp screw — consult the holder manufacturer documentation for fastener torque requirements. Inspect the holder pocket for wear or damage each time the insert is changed.