Chicago-latrobe 48822 Screw Machine Drill Bit 0.377 in Hss

Product Description

The CHICAGO-LATROBE 48822 is a screw machine length drill bit designed for general-purpose metal drilling in production and maintenance environments. Manufactured from high speed steel with a bright/uncoated finish, this bit measures 0.377 inches in diameter and corresponds to Letter V sizing. The 118-degree standard point angle is ground to a web-thinned, parallel web configuration, reducing thrust and improving centering on entry. Overall length is 3.25 inches with a 1.875-inch flute length, making it well suited for use in turret lathes, screw machines, and short-reach drilling applications where rigidity matters. The straight-cylindrical shank seats securely in standard drill chucks.

This bit is rated for cutting cast iron, non-ferrous metals, and steel under general-purpose conditions. The regular spiral, two-flute design promotes efficient chip evacuation during moderate-feed drilling. It is a practical choice for machine shops, HVAC fabricators, pipefitters, and electricians drilling pilot or clearance holes through structural steel, aluminum, and similar workpiece materials. The Series 157 designation indicates CHICAGO-LATROBE standard screw machine geometry with ISO-conforming dimensional tolerances.

Key Features

• Letter V size — 0.377-inch diameter with a tolerance of +0.0000 to -0.0010 inches for accurate hole sizing
• 118-degree standard point with web thinning for reduced entry thrust and improved centering
• High speed steel construction — suitable for cast iron, non-ferrous metals, and steel
• Bright/uncoated finish — compatible with cutting fluid application and easy to regrind
• Screw machine length at 3.25 inches overall for maximum rigidity in chucked setups
• Right-hand cut, regular spiral, two-flute design for effective chip removal

Compatibility

Designed as a general-purpose screw machine length drill bit suitable for use in standard drill chucks, turret lathes, and CNC screw machine setups that accept straight-cylindrical shanks in the 0.3500 to 0.4000-inch diameter range.

Installation Notes

Installation is performed by machinists, tool-and-die technicians, or qualified tradespeople using a keyed or keyless drill chuck rated for the shank diameter. Ensure the machine spindle is fully stopped and locked before changing bits. Secure the shank fully in the chuck to prevent slippage under load. Apply cutting fluid or coolant appropriate to the workpiece material to extend tool life and maintain hole-size tolerance.