Chicago-latrobe 48512 Screw Machine Drill Bit 3/16 in Hss

Product Description

The CHICAGO-LATROBE 48512 is a screw machine length drill bit designed for general-purpose hole-making in metal fabrication and maintenance applications. Manufactured from high speed steel with a bright/uncoated finish, this bit features a 3/16 inch (0.1875 inch) diameter, a standard 118-degree point angle, and a right-hand spiral flute configuration. The shortened screw machine length body provides increased rigidity compared to jobber-length bits, reducing deflection in drill press and hand-drill operations. It is suited for machinists, maintenance technicians, pipefitters, and HVAC and plumbing tradespeople who regularly drill through ferrous and non-ferrous metals.

The 48512 is built for drilling cast iron, non-ferrous metals, and steel in production and field service environments. The screw machine length design makes it well suited for use in tight clearance areas and on drill presses where stub-length tooling is preferred. The straight-cylindrical shank fits standard drill chucks without modification. This bit ships individually and is sold in multiples of 12 for shop stock replenishment.

Key Features

• 3/16 inch diameter with a diameter tolerance of +0.0000 to -0.0007 inches for consistent hole sizing
• 118-degree standard point angle suitable for general-purpose drilling in steel, cast iron, and non-ferrous metals
• High speed steel construction provides heat resistance during continuous drilling operations
• Screw machine (stub) length body increases rigidity and reduces bit deflection
• Regular spiral, 2-flute design promotes efficient chip evacuation
• Web-thinned parallel web configuration reduces thrust load at the cutting tip
• Bright/uncoated finish for easy visual wear inspection

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard drill chucks accepting straight-cylindrical shanks. Compatible with cast iron, non-ferrous metal, and steel workpieces per Series 157 specifications.

Installation Notes

This bit is installed by machinists and trade technicians using standard keyed or keyless drill chucks on drill presses, lathes, or hand drills. Secure the straight-cylindrical shank firmly in the chuck before operation. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life and maintain hole tolerances. Inspect the cutting edges for wear before each use and replace when the point shows signs of chipping or excessive dulling.