Chicago-latrobe 48709 Screw Machine Drill Bit Hss

Product Description

The CHICAGO-LATROBE 48709 is a screw machine length drill bit designed for general-purpose hole-making in metal fabrication, mechanical, and trade service applications. Manufactured from high speed steel (HSS) with a bright/uncoated finish, this bit features a 0.196 inch diameter, a standard 118-degree point angle, and a 2-flute spiral flute design with web thinning for reduced thrust and cleaner entry. The straight-cylindrical shank seats securely in standard drill chucks. The screw machine length format provides a shorter, more rigid profile compared to jobber-length bits, making it well-suited for confined spaces and precise, controlled drilling.

This drill bit is intended for right-hand cutting in cast iron, non-ferrous metals, and steel. The shorter overall length of 2-1/4 inches and a flute length of 1-3/16 inches give it added rigidity, which reduces deflection on short-hole operations. It is a common choice for machinists, maintenance mechanics, pipefitters, and HVAC technicians who need accurate, repeatable holes in ferrous and non-ferrous metal components. Sold individually, with a minimum order quantity of 12 units.

Key Features

• High speed steel construction for general-purpose metal drilling durability
• 0.196 inch diameter with a tight tolerance of +0.0000 to -0.0007 inches
• 118-degree standard point angle with web-thinned tip for reduced entry thrust
• Screw machine length profile adds rigidity and minimizes deflection in short-hole applications
• Bright/uncoated finish — compatible with a wide range of cutting fluids
• Parallel web configuration with regular spiral flute for consistent chip evacuation

Compatibility

Designed for drilling cast iron, non-ferrous metals, and steel. Fits standard drill chucks accepting straight-cylindrical shanks. Part of the CHICAGO-LATROBE Series 157 screw machine drill bit line, sized within the 0.1500 to 0.2000 inch decimal inch range. Wire gauge size equivalent: No. 9.

Installation Notes

Install in a drill press, hand drill, or mill with a properly sized chuck, ensuring the shank is fully seated and secured before operation. Power down and de-energize any machinery before changing bits. Use appropriate cutting fluid or coolant for the workpiece material to extend bit life, even though this bit does not feature a coolant-through design. Follow applicable shop safety standards and wear eye protection during all drilling operations.