Chicago-latrobe 48813 Screw Machine Drill Bit 0.295 in Hss

Product Description

The CHICAGO-LATROBE 48813 is a Series 157 screw machine length drill bit designed for general-purpose drilling in production and job-shop environments. Manufactured from high speed steel (HSS) with a bright, uncoated finish, it features a 0.295 inch (Letter M) diameter, a standard 118-degree point angle, and a web-thinned parallel web for reduced thrust and easier starting. At 2.75 inches overall length with a 1.5625 inch flute length, this stub-length bit provides increased rigidity compared to jobber-length drills, making it well suited for drill press, turret lathe, and screw machine applications.

This bit is intended for right-hand cutting in cast iron, non-ferrous metals, and steel. The straight-cylindrical shank seats securely in standard drill chucks and collet holders. Its screw machine length geometry reduces deflection in short-hole applications and in setups where spindle-to-work clearance is limited. Machinists, tool and die makers, and general metalworking shops will find this bit appropriate for repetitive drilling operations on production runs and short-run work alike. It conforms to ISO standards for HSS drill geometry.

Key Features

• Letter M (0.295 inch) diameter with a tolerance of +0.0000 to -0.0010 inches for consistent hole sizing
• High speed steel construction provides adequate wear resistance for ferrous and non-ferrous workpieces
• 118-degree standard point angle suits a broad range of metal drilling applications
• Web-thinned parallel web reduces axial thrust and improves chip evacuation at entry
• Screw machine (stub) length increases rigidity and minimizes deflection in short-hole drilling
• Bright, uncoated finish — no coating to chip or delaminate; compatible with cutting fluids
• Two-flute regular spiral design promotes efficient chip removal

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard drill chucks and collet holders accepting a straight-cylindrical shank. Suitable for drilling cast iron, non-ferrous metals, and steel. Conforms to ISO dimensional standards for HSS stub-length drill bits.

Installation Notes

Install and remove this bit only with the machine spindle fully stopped and power locked out. Secure the straight shank firmly in the chuck or collet to the full depth of the shank before beginning any drilling operation. Use an appropriate cutting fluid for the workpiece material to extend tool life and improve hole finish. Inspect the cutting edges and point for wear or chipping before each use; a dull or damaged bit increases thrust loads and can lead to breakage.