Chicago-latrobe 41608 1/8 Inch Jobber Drill Bit Hss Tin

Product Description

The CHICAGO-LATROBE 41608 is a jobber-length twist drill bit designed for professional metalworking and fabrication applications. Built from high speed steel with a titanium nitride (TiN) coating, the bit delivers extended tool life and reduced friction when drilling through ferrous and hard metals. The 135-degree split point starts on contact without walking, eliminating the need for a center punch on most surfaces. At 2.75 inches overall length with a 1.625-inch flute length, it fits standard drill chucks and magnetic drill rigs. The straight-cylindrical shank and web-thinned, tapered web construction reduce thrust and improve chip evacuation in demanding materials. This is a heavy-duty grade bit built to NAS 907 Type B standards.

The 41608 is suited for drilling cast iron, stainless steel, and carbon steel in production, maintenance, and fabrication environments. Licensed trades including pipefitters, ironworkers, HVAC sheet metal mechanics, and maintenance electricians reach for this bit when working through structural steel, equipment housings, and welded assemblies. The 0.125-inch diameter makes it a standard choice for pilot holes, small fastener clearances, and conduit knockout preparation in tight spaces.

Key Features

• High speed steel construction with titanium nitride coating for extended wear life in ferrous metals
• 135-degree split point starts on contact, reducing walking and eliminating center-punch steps on hard surfaces
• Web-thinned tapered web reduces drilling thrust and improves chip evacuation
• Right-hand, 2-flute regular spiral design clears chips efficiently in cast iron, stainless steel, and steel
• Straight-cylindrical shank fits standard 3-jaw drill chucks without modification
• Meets NAS 907 Type B specification for consistent dimensional tolerances

Compatibility

Designed for use in standard drill chucks, drill presses, and magnetic base drills. Primary workpiece materials include cast iron, stainless steel, and steel. Series 150ASP-TN is rated for high-performance heavy-duty drilling within the 0.1000 to 0.1500 decimal inch diameter range.

Installation Notes

Install into a properly sized chuck and tighten securely before operation. Use appropriate cutting fluid or coolant when drilling stainless steel or cast iron to manage heat and extend bit life. Inspect the cutting edges for wear before each use; a dull bit on stainless steel work-hardens the material and accelerates bit failure. Follow applicable OSHA machine guarding requirements when operating drill presses or magnetic base drills.