Chicago-latrobe 48734 Screw Machine Drill Bit 0.111 in

Product Description

The CHICAGO-LATROBE 48734 is a screw machine length drill bit designed for high-speed steel cutting in general-purpose metalworking applications. At 0.111 inches in diameter (Wire Size 34), this bit features a 118-degree standard point angle and a two-flute regular spiral configuration with web thinning for improved chip clearance and reduced thrust. The straight-cylindrical shank allows straightforward chuck mounting. At 0.0045 pounds, it is a lightweight precision bit suited for production drilling environments where short flute lengths and rigid setups are required.

This drill bit is engineered for use on cast iron, non-ferrous metals, and steel. The screw machine length format — shorter overall length compared to jobber bits — reduces deflection and improves hole accuracy, making it a common choice for drill press work, turret lathes, and screw machine operations in production shops. It is appropriate for both manual and CNC drilling setups where precise small-diameter holes are needed in ferrous and non-ferrous workpieces.

Key Features

• 0.111 inch diameter (Wire Size 34) with tolerance of +0.0000 to -0.0005 inches for tight hole accuracy
• 118-degree standard point angle suitable for general-purpose metal drilling
• Web-thinned parallel web reduces entry force and improves chip evacuation
• High speed steel construction provides durability across cast iron, steel, and non-ferrous materials
• Bright/uncoated finish — no coating to flake or interfere with dimensional tolerances
• Screw machine length (1-7/8 inches overall, 7/8 inch flute) for reduced deflection in close-tolerance work

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard straight-shank drill chucks in drill presses, turret lathes, CNC machining centers, and hand-held power drills. Primary workpiece materials include cast iron, non-ferrous metals, and steel. Conforms to ISO standards per Series 157 specifications.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with drill press and lathe operations. Secure the shank fully in the chuck before operation and confirm the workpiece is firmly clamped to prevent movement. Disconnect and lock out power to the machine before changing or inspecting the bit. Follow applicable shop safety protocols and manufacturer feed-and-speed guidelines for the workpiece material being drilled.