Chicago-latrobe 48801 Screw Machine Drill Bit 0.234 in Hss

Product Description

The CHICAGO-LATROBE 48801 is a screw machine length drill bit designed for general-purpose drilling in a wide range of workpiece materials. Built from high speed steel (HSS) with a bright, uncoated finish, this bit features a 0.234 inch (15/64 inch, Letter A) diameter and a standard 118 degree point angle. The shorter screw machine length body improves rigidity and reduces deflection compared to jobber-length bits, making it well-suited for high-volume production and close-tolerance work. A web-thinned, parallel-web design reduces cutting resistance at the point, while the regular spiral flute geometry promotes efficient chip evacuation. This bit is sold individually and is intended for use by machinists, maintenance technicians, and trade professionals.

The CHICAGO-LATROBE 48801 Series 157 drill bit is used in screw machine, lathe, and drill press applications where a compact, rigid cutting tool is required. It is appropriate for drilling cast iron, non-ferrous metals, and steel in both production shop and field maintenance settings. The straight-cylindrical shank fits standard drill chucks without adapters. Its 2-7/16 inch overall length and 1-5/16 inch flute length are sized for shallow to moderate depth holes in typical screw machine work envelopes.

Key Features

• 0.234 inch (15/64 inch, Letter A) diameter with a tolerance of +0.0000 to -0.0007 inches for precise hole sizing
• High speed steel construction provides durability across cast iron, non-ferrous metal, and steel workpieces
• 118 degree standard point angle with web-thinning reduces entry force and walk
• Screw machine length body increases rigidity and minimizes deflection versus longer bit styles
• Regular spiral flute with right-hand cut promotes consistent chip clearance during through and blind-hole drilling
• Bright, uncoated finish — no coating buildup to affect hole diameter tolerances

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard drill chucks accepting straight-cylindrical shanks. Suitable for drilling cast iron, non-ferrous metals, and steel. Conforms to ISO standards for drill bit geometry.

Installation Notes

This bit is installed by machinists and maintenance technicians in drill presses, lathes, or screw machines using a standard chuck. Ensure the workpiece is securely fixtured and the spindle speed is set appropriately for the workpiece material and bit diameter before drilling. Inspect the cutting edges for wear or chipping before each use and replace if the point is damaged. Always wear appropriate eye protection when operating drilling equipment.