Chicago-latrobe 48738 Screw Machine Drill Bit 0.1015 in Hss

Product Description

The CHICAGO-LATROBE 48738 is a screw machine length drill bit designed for high-production drilling in metal fabrication, maintenance, and machining applications. Built from high speed steel (HSS) with a bright/uncoated finish, this bit delivers reliable performance across a range of ferrous and non-ferrous materials. It measures 0.1015 inches in diameter — equivalent to wire gauge size 38 — with an overall length of 1-13/16 inches and a flute length of 13/16 inches. The 118-degree standard point angle and web-thinned tip reduce entry force and improve centering on the workpiece. Rated for general purpose use, this bit suits trade professionals and machinists who need a compact, dependable drill for tight-clearance drilling tasks.

The 48738 is suited for drilling cast iron, non-ferrous metals, and steel in both shop and field environments. Its screw machine length profile — shorter than a jobber bit — provides increased rigidity and reduced deflection, making it a preferred choice for drill press work, CNC setups, and hand-held operations where control and accuracy matter. The straight-cylindrical shank fits standard drill chucks without adapters. Series 157 is a general purpose line intended for everyday metal drilling tasks across light manufacturing, HVAC fabrication, plumbing rough-in work, and electrical panel work requiring clean, precise small-diameter holes.

Key Features

• 0.1015 inch diameter (wire gauge 38) with a diameter tolerance of +0.0000 to -0.0005 inches for consistent hole sizing
• 118-degree standard point angle with web-thinned tip reduces thrust and improves self-centering
• High speed steel construction handles cast iron, steel, and non-ferrous metals
• Screw machine length body (1-13/16 inches overall) provides extra rigidity and reduces bit deflection
• 2-flute regular spiral design clears chips efficiently in short-hole drilling
• Bright/uncoated finish — no coating to chip or peel, straightforward resharpening when needed

Compatibility

Designed as a general purpose screw machine length drill bit compatible with standard drill chucks accepting straight-cylindrical shanks. Suitable for use on drill presses, CNC machines, and handheld drills. Meets ISO standards for dimensional accuracy.

Installation Notes

This bit is installed and operated by machinists, fabricators, and trade professionals using standard drill equipment. Secure the straight-cylindrical shank firmly in the chuck before operation and verify the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or lubrication when drilling steel to extend bit life. Inspect the cutting edges before each use and replace or resharpen the bit if the point shows signs of wear to avoid oversized or ragged holes.