Chicago-latrobe 50802 Screw Machine Drill Bit 5/64 Cobalt

Product Description

The CHICAGO-LATROBE 50802 is a cobalt screw machine length drill bit designed for heavy-duty drilling in tough ferrous materials. It measures 5/64 inch (0.0781 inches) in diameter with an overall length of 1-11/16 inches and a flute length of 11/16 inches. The 135-degree split point reduces walking and allows faster penetration without a center punch. The web-thinned, parallel web construction reduces thrust requirements on entry. This bit is built to Series 559 heavy-duty standards and is suited for machinists, maintenance technicians, and tool-and-die professionals working on steel and cast iron applications.

The 50802 is intended for screw machine length drilling operations where a shorter, stiffer bit profile is needed to maintain hole accuracy and reduce deflection. Its cobalt construction handles elevated cutting temperatures that would degrade standard high-speed steel bits. Primary workpiece materials include cast iron and steel. The straight-cylindrical shank seats in standard drill chucks and quick-change holders. This bit fits production drilling, CNC setup work, and manual machine tool operations where tight tolerance and tool longevity are the primary concerns.

Key Features

• Cobalt construction (M42 material grade) for heat resistance and extended tool life in ferrous materials
• 135-degree split point with web thinning reduces thrust and eliminates the need for a center punch
• Screw machine length profile provides added rigidity and improved hole straightness
• Right-hand cut spiral flute design with regular helix for efficient chip evacuation
• Diameter tolerance held to +0.0000 to -0.0005 inches for precise fitment
• ISO standards compliance for consistent dimensional quality

Compatibility

Designed for drilling cast iron and steel workpieces. The straight-cylindrical shank is compatible with standard drill chucks and quick-change toolholding systems used in drill presses, lathes, and CNC machining centers.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with drill press and machine tool operation. Secure the workpiece and verify chuck tightness before beginning a cut. Use appropriate cutting fluid for steel and cast iron to extend tool life and maintain dimensional accuracy. Inspect the cutting edges for wear before each use; a chipped or dull cobalt bit should be resharpened or replaced rather than forced.