Chicago-latrobe 50910 Cobalt Screw Machine Drill Bit 0.052 in

Product Description

The CHICAGO-LATROBE 50910 is a cobalt screw machine length drill bit designed for heavy-duty drilling in cast iron and steel. Built to Series 559 standards, it carries a wire gauge size of 55 with a decimal diameter of 0.052 inches. The 135-degree split point reduces walking and cutting force on entry, making it well suited for production environments and repetitive drilling operations. At 1.625 inches overall length with a 0.625-inch flute, this stub-length geometry provides added rigidity compared to jobber-length bits. M42 cobalt material grade gives the bit elevated heat resistance for extended tool life in ferrous materials.

This drill bit is intended for use in screw machine operations, CNC drilling, and manual drill press work where a short, rigid cutting tool is preferred. The straight cylindrical shank fits standard drill chucks without modification. Primary target materials are cast iron and steel, covering a wide range of fabrication, maintenance, and production machining applications. The right-hand spiral flute clears chips efficiently during through-hole and blind-hole drilling. Trades such as machinists, pipefitters, and industrial maintenance technicians regularly use screw machine length bits in confined-clearance or high-cycle drilling scenarios.

Key Features

• M42 cobalt construction for elevated heat resistance in ferrous materials
• 135-degree split point reduces thrust force and minimizes bit walking on entry
• Web-thinned parallel web improves chip evacuation and reduces torque demand
• Stub screw machine length at 1.625 inches overall adds rigidity vs. jobber bits
• Diameter tolerance held to +0.0000 to -0.0005 inches for close-tolerance work
• ISO standards compliance for consistent dimensional and performance quality

Compatibility

Designed for use in standard straight-shank drill chucks on drill presses, CNC machining centers, and screw machines; primary workpiece materials are cast iron and steel as specified by the manufacturer for Series 559 heavy-duty cobalt bits.

Installation Notes

Installation is performed by machinists or maintenance technicians using a compatible drill chuck sized for a straight cylindrical shank. Secure the bit fully in the chuck before operating to prevent slippage under load. Use appropriate cutting fluid or coolant when drilling steel to reduce heat buildup, noting this bit does not support internal coolant-through delivery. Follow applicable machine shop safety practices and equipment manufacturer guidelines for spindle speed and feed rate selection.