Chicago-latrobe 48824 Screw Machine Drill Bit 0.397 in Hss

Product Description

The CHICAGO-LATROBE 48824 is a screw machine length drill bit designed for general-purpose metal drilling in demanding trade and production environments. Built from high speed steel with a bright, uncoated finish, it features a 118-degree standard point angle, a right-hand spiral flute, and a straight-cylindrical shank. The short screw machine length profile improves rigidity and reduces deflection compared to jobber-length bits, making it a practical choice for drill press work, screw machine operations, and close-tolerance hole making. Diameter is 0.397 inches, overall length is 3-5/16 inches, and flute length is 1-15/16 inches.

This bit is suited for production drilling and maintenance operations in metalworking, HVAC fabrication, plumbing rough-in, and general mechanical trade applications. Primary workpiece materials include cast iron, non-ferrous metals, and steel. The short body length makes it well-matched for use in drill presses, CNC turrets, and screw machines where rigidity and minimal runout are priorities. It is sold individually and is appropriate for both shop production use and field service drilling tasks requiring consistent hole quality.

Key Features

• High speed steel construction for durability across ferrous and non-ferrous materials
• 118-degree standard point angle for general-purpose metal drilling
• Screw machine length body improves rigidity and reduces deflection
• Web-thinned parallel web design for improved chip evacuation and reduced thrust
• Bright, uncoated finish — no coating to add dimensional variability at the cutting edge
• Diameter tolerance of +0.0000 to -0.0010 inches for consistent hole sizing

Compatibility

Designed for use in standard straight-shank drill chucks on drill presses, screw machines, and CNC equipment. Compatible with cast iron, non-ferrous metal, and steel workpieces as noted in the manufacturer specifications. Part of CHICAGO-LATROBE Series 157.

Installation Notes

Installation is performed by machinists, tool and die technicians, or skilled trade professionals using standard drill press or machine tool equipment. Secure the shank fully in the chuck and verify zero or minimal runout before drilling. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.