Chicago-latrobe 48224 Screw Machine Drill Bit 0.375 in

Product Description

The CHICAGO-LATROBE 48224 is a screw machine length drill bit engineered for heavy-duty drilling in cast iron and steel. It measures 0.375 inches (3/8 inch) in diameter with an overall length of 3.125 inches and a flute length of 1.8125 inches. The bit is manufactured from high speed steel with a coated finish for extended tool life. The 135-degree split point and web-thinned, parallel web configuration reduce entry force and improve hole location accuracy. With two spiral flutes in a regular helix pattern and a straight-cylindrical shank, this bit seats reliably in standard drill chucks and screw machine spindles. It is sized to a diameter tolerance of +0.0000 to -0.0010 inches, meeting ISO and NAS 907 (NAS) standards.

The 48224 is suited for production and maintenance applications where shorter bit length improves rigidity and reduces deflection. Screw machine length bits are a preferred choice when drilling through cast iron castings, carbon steel stock, alloy steel components, or structural steel in tight clearance setups. The heavy-duty performance rating makes this bit appropriate for use in CNC screw machines, drill presses, and hand-held drilling equipment where controlled feed rates can be maintained. It ships individually and is intended for single-unit replacement or tooling inventory replenishment.

Key Features

• High speed steel construction with coated finish for improved wear resistance
• 135-degree split point reduces thrust and self-centers on contact
• Web-thinned parallel web lowers cutting resistance in hard ferrous materials
• Screw machine (stub) length provides added rigidity and reduced deflection
• Straight-cylindrical shank fits standard drill chucks without adapters
• Meets ISO and NAS 907 (NAS) specifications

Compatibility

Designed as an OEM-style replacement or production tooling option for screw machine and drill press setups requiring a 3/8 inch diameter stub-length bit rated for cast iron and steel workpieces.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with drilling operations. Secure the straight-cylindrical shank firmly in the drill chuck and verify concentricity before operation. Ensure the workpiece is clamped securely and the drilling equipment is at a full stop before bit changes. Follow applicable machine guarding and PPE requirements per shop safety standards.