Chicago-latrobe 49023 Screw Machine Drill Bit 11mm Cobalt

Product Description

The CHICAGO-LATROBE 49023 is a cobalt screw machine length drill bit engineered for heavy-duty metal drilling applications. Built from M42 cobalt high-speed steel, it delivers the heat resistance needed when drilling tough ferrous materials at sustained feed rates. The 11.00 mm diameter bit features a 135-degree split point that self-centers on contact, reducing the need for a center punch and minimizing walking on hard surfaces. With an overall length of 3.878 inches and a flute length of 1.918 inches, the stub-length body provides rigidity that reduces deflection in production drilling environments. A straw oxide finish adds additional wear resistance. This bit is sold individually.

The 49023 is intended for drilling cast iron and steel in fabrication, maintenance, and production machining settings. The screw machine length format makes it well suited for drill press, CNC, and hand-drill use where rigidity matters more than reach. Its right-hand cutting direction and regular spiral flute geometry are standard for metal removal in both light manufacturing and heavy industrial applications. Machinists, maintenance technicians, and metalworking fabricators are the primary users.

Key Features

• M42 cobalt construction for heat resistance and long tool life in ferrous materials
• 135-degree split point reduces thrust and eliminates center-punching on most setups
• Screw machine (stub) length body for maximum rigidity and reduced deflection
• Straw oxide finish provides additional surface hardness and lubricity
• Right-hand cut with regular spiral flute geometry for efficient chip evacuation
• Conforms to DIN 1897 specification for consistent dimensional accuracy

Compatibility

Designed for drilling cast iron and steel workpieces; compatible with standard drill chucks and CNC spindles accepting an 11.00 mm straight cylindrical shank.

Installation Notes

Secure the bit firmly in a drill chuck or collet and verify runout before use to prevent premature wear. Use appropriate cutting fluid or coolant when drilling steel at higher feed rates to manage heat buildup, as coolant-through is not available on this bit. Ensure the workpiece is clamped securely before beginning a cut. Follow applicable shop safety practices and machine manufacturer guidelines for speed and feed settings.