Chicago-latrobe 41677 Jobber Drill Bit Wire 7 Hss Tin

Product Description

The CHICAGO-LATROBE 41677 is a jobber-length drill bit in wire gauge size 7, equal to 0.2010 inches in diameter, manufactured from high-speed steel with a titanium nitride (TiN) coating. It features a 135-degree split point for reduced walking and faster penetration on hard materials. The web-thinned, tapered web design lowers thrust requirements and improves chip evacuation. At 3.625 inches overall length with a 2.4375-inch flute length, this bit fits standard drill chucks and handles demanding production or maintenance drilling tasks. It is intended for use by machinists, maintenance technicians, and metalworking tradespeople requiring a heavy-duty, high-performance drill bit that meets NAS 907 Type B standards.

This bit is suited for drilling cast iron, stainless steel, and carbon steel in residential, commercial, and industrial maintenance applications. The TiN coating extends tool life by reducing friction and heat buildup at the cutting edge, making it a practical choice for repeat-use scenarios in metal fabrication shops, mechanical rooms, and field service environments. The straight-cylindrical shank seats securely in keyed or keyless chucks across a wide range of portable and bench-mounted drill equipment. Series 150ASP-TN designates the heavy-duty performance tier within the CHICAGO-LATROBE line.

Key Features

• Wire size 7 diameter: 0.2010 inches, conforming to NAS 907 Type B specification
• 135-degree split point reduces bit walking and decreases required feed pressure
• Titanium nitride (TiN) coating increases surface hardness and extends tool life
• Web-thinned tapered web improves chip flow and lowers cutting thrust
• Right-hand spiral flute with regular helix for consistent chip evacuation
• Straight-cylindrical shank sized at 1.1875 inches for secure chuck engagement

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for metalworking applications requiring a wire gauge size 7 drill in high-speed steel; compatible with standard drill chucks accepting a straight-cylindrical shank. Primary workpiece materials include cast iron, stainless steel, and steel as specified by the manufacturer.

Installation Notes

Installation is performed by machinists or qualified maintenance technicians using standard drill press, hand drill, or CNC drilling equipment. Secure the straight-cylindrical shank firmly in the chuck and verify runout before beginning the cut. Always wear appropriate eye protection and secure the workpiece before drilling. Cutting fluid or coolant is recommended when drilling stainless steel or hardened steel to manage heat, even though this bit does not have an internal coolant-through channel.