Chicago-latrobe 50895 Screw Machine Drill Bit 0.098 in Cobalt

Product Description

The CHICAGO-LATROBE 50895 is a cobalt screw machine length drill bit designed for high-speed metal removal in production and maintenance environments. Built from M42 cobalt high-speed steel, it carries a 135-degree split point that reduces walking and allows immediate cutting without a center punch. At 0.098 inches (Wire Size 40) in diameter, this bit is suited for precision hole-making in ferrous materials where heat buildup and tool wear are primary concerns. Licensed machinists, tool-and-die shops, and industrial maintenance techs rely on this Series 559 bit for demanding, repetitive drilling operations.

This bit is intended for drilling cast iron and steel in applications that demand tight tolerances. The stub-length body provides added rigidity compared to jobber-length bits, reducing deflection in short-reach setups such as turret lathes, screw machines, and drill presses. It is well-suited to production environments where consistent hole diameter and repeatability matter. The parallel web configuration and web-thinned point ease chip evacuation and reduce thrust requirements in deep or interrupted cuts.

Key Features

• M42 cobalt construction resists heat and abrasion when drilling hard ferrous materials
• 135-degree split point reduces thrust and eliminates the need for center-punching
• Web-thinned, parallel web design improves chip flow and lowers cutting force
• Screw machine (stub) length provides rigidity and reduced deflection in close-quarters setups
• Right-hand spiral flute with regular helix promotes controlled chip evacuation
• Diameter tolerance of +0.0000 to -0.0005 inches supports tight-tolerance hole requirements
• ISO standard compliant for consistent dimensional accuracy

Compatibility

Designed for use in standard straight-shank drill chucks on drill presses, turret lathes, CNC machining centers, and screw machines. Primary workpiece materials are cast iron and steel.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or maintenance technicians familiar with metal-cutting operations. Secure the straight-cylindrical shank fully in a properly sized drill chuck before operation and verify chuck runout before production use. Always wear appropriate eye and hand protection and follow machine guarding requirements per OSHA and facility safety standards. Do not exceed the spindle speed and feed recommendations appropriate for the workpiece material and bit diameter.