Chicago-latrobe 50896 Cobalt Screw Machine Drill Bit

Product Description

The CHICAGO-LATROBE 50896 is a cobalt screw machine length drill bit designed for high-production drilling in ferrous metals and tough materials. Built on the Series 559 platform, it measures 0.096 inches in diameter, equivalent to Wire Size 41, with a 135-degree split point that reduces walking and enables faster penetration without a center punch. The overall length is 1-13/16 inches with a 13/16-inch flute length. The parallel-web, web-thinned geometry reduces thrust requirements, and the straight-cylindrical shank seats securely in standard drill chucks. This bit is rated for heavy-duty performance and held to a tight diameter tolerance of +0.0000 to -0.0005 inches.

This drill bit is suited for machining and fabrication environments where short, rigid tooling is required in cast iron and steel workpieces. The compact screw machine length minimizes deflection in close-tolerance drilling operations, making it a practical choice for CNC drill presses, turret lathes, and benchtop drilling setups in production shops or field fabrication. The right-hand spiral flute clears chips efficiently at standard drilling speeds. ISO standards compliance supports use in shops with formal tooling specifications.

Key Features

• Cobalt construction provides heat resistance and edge retention in steel and cast iron
• 135-degree split point starts on contact, reducing drill walk and cutting cycle time
• Web-thinned, parallel-web design lowers axial thrust and extends tool life
• Screw machine length at 1-13/16 inches overall delivers rigidity and minimizes deflection
• Tight diameter tolerance of +0.0000 to -0.0005 inches supports close-tolerance work
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a screw machine length replacement bit for drilling cast iron and steel in production and fabrication applications requiring Wire Size 41 diameter tooling.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with proper speeds and feeds for cobalt tooling in ferrous metals. Secure the straight-cylindrical shank fully in the chuck and verify runout before beginning a drilling cycle. Coolant through is not supported on this bit, so apply cutting fluid externally when drilling steel to manage heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or wear is detected to maintain hole tolerance.