Chicago-latrobe 48402 Screw Machine Drill Bit 0.116 in

Product Description

The CHICAGO-LATROBE 48402 is a screw machine length drill bit engineered for heavy-duty drilling in cast iron and steel. It measures 0.116 inches (No. 32 wire gauge) in diameter with an overall length of 1.875 inches and a flute length of 0.875 inches. The bit is made from high speed steel with a coated finish for added wear resistance. A 135-degree split point starts on contact without a center punch, and the web-thinned, parallel web construction reduces thrust while improving chip evacuation. This bit is sold individually and is suited for production and maintenance drilling environments.

This drill bit is designed for screw machine length applications where a shorter, more rigid tool is needed for close-tolerance drilling in metal fabrication, machine shops, and maintenance settings. Its right-hand spiral flute geometry and straight-cylindrical shank make it compatible with standard drill chucks and CNC turret setups. Primary workpiece materials are cast iron and steel. The bit carries NAS 907 designation and meets ISO standards, making it appropriate for regulated production environments.

Key Features

• 0.116 inch (No. 32 wire gauge) diameter with a tight tolerance of +0.0000 to -0.0005 inches
• 135-degree split point for self-centering starts on cast iron and steel
• High speed steel construction with coated finish for extended service life
• Screw machine length body (1.875 inches overall) provides increased rigidity over jobber-length bits
• Web-thinned parallel web reduces cutting thrust and improves chip clearance
• Meets NAS 907 and ISO standards for use in production and regulated applications

Compatibility

Designed as an OEM-style replacement or direct substitute for No. 32 wire gauge screw machine drill bits used in standard drill chucks and CNC turret applications involving cast iron and steel workpieces.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with metal drilling operations. Secure the straight-cylindrical shank fully in the chuck before operation and verify runout is within acceptable limits. Always wear appropriate eye protection and follow OSHA and shop safety protocols when operating drill presses, CNC machines, or hand drills with this bit. Do not exceed the recommended feed and speed parameters for the workpiece material.