Chicago-latrobe 50810 Screw Machine Drill Bit 13/64

Product Description

The CHICAGO-LATROBE 50810 is a cobalt screw machine length drill bit designed for high-performance drilling in tough materials including cast iron and steel. Built to Series 559 specifications, it features a 135-degree split point that reduces walking and allows immediate cutting without a center punch. The 13/64-inch (0.2031-inch) diameter bit spins with a right-hand cut and carries a parallel web configuration with web thinning for reduced thrust load. This is a heavy-duty tool intended for production and trade environments where drill life and hole accuracy matter.

This bit is suited for screw machine and general metalworking applications in fabrication shops, maintenance facilities, and industrial settings. The shorter screw machine length body provides added rigidity compared to jobber-length bits, making it a reliable choice for drilling in fixtures, jigs, or tight-clearance setups. Primary workpiece materials are cast iron and steel. It ships individually and carries an ISO standard designation.

Key Features

• 13/64 inch (0.2031 inch) diameter with a tight tolerance of +0.0000 to -0.0007 inches
• 135-degree split point reduces drill walking and lowers thrust requirements
• M42 cobalt material grade for heat resistance and extended tool life in ferrous metals
• Screw machine length body provides greater rigidity than standard jobber bits
• Web-thinned parallel web reduces cutting resistance and improves chip evacuation
• Right-hand spiral flute with 2 flutes for efficient chip removal

Compatibility

Designed as a replacement or production-use cobalt screw machine drill bit for drilling cast iron and steel workpieces with a straight-cylindrical shank compatible with standard drill chucks and machine spindles.

Installation Notes

Installation and use should be performed by machinists or qualified trade professionals familiar with drill press, lathe, or CNC equipment. Secure the straight-cylindrical shank firmly in the chuck before operation and verify runout before cutting. Always wear appropriate eye protection and use cutting fluid when drilling steel or cast iron to extend bit life and manage heat buildup. Do not exceed the recommended RPM range for the workpiece material and bit diameter.