Chicago-latrobe 50841 Cobalt Screw Machine Drill Bit L

Product Description

The CHICAGO-LATROBE 50841 is a cobalt screw machine length drill bit designed for heavy-duty drilling in ferrous materials. Built to Series 559 standards, this bit measures 0.29 inches (Letter L) in diameter with an overall length of 2.75 inches and a flute length of 1.5625 inches. The 135-degree split point reduces walking and enables self-centering on contact, while the web-thinned, parallel web construction reduces thrust and improves chip evacuation. The M42 cobalt steel construction resists heat buildup during prolonged drilling cycles, making it a reliable choice for machinists and maintenance trades working on production or repair operations.

This bit is suited for drilling cast iron and steel in screw machine, production shop, and general metalworking applications. The screw machine length profile provides added rigidity compared to jobber-length bits, making it well-suited for use in drill presses, CNC machines, lathes, and turret setups where stub-length tooling performs best. The right-hand spiral flute pulls chips up and out of the hole during operation. This bit is sold individually and is appropriate for both light production and heavy intermittent drilling tasks.

Key Features

• M42 cobalt steel construction handles heat generated in high-speed drilling of steel and cast iron
• 135-degree split point with web thinning for self-centering and reduced entry thrust
• Screw machine length body provides rigidity for use in drill presses and CNC setups
• Right-hand cut with regular spiral flute for efficient chip removal
• Straight-cylindrical shank fits standard drill chucks without adapters
• Diameter tolerance of +0.0000 to -0.0010 inches for precise hole sizing
• ISO standards compliance for consistent dimensional quality

Compatibility

Designed for use in standard drill presses, CNC machining centers, lathes, and turret-type machines that accept straight-cylindrical shank tooling. 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 metalworking equipment. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the shank firmly in a properly sized drill chuck or collet to prevent slippage under load. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.