Chicago-latrobe 47498 Jobber Drill Bit Letter K 9/32 Hss

Product Description

The CHICAGO-LATROBE 47498 is a jobber-length twist drill bit sized at Letter K (9/32 inch, 0.2812 inch decimal) and ground to a 118-degree standard point angle. It is manufactured from high speed steel with an oxide coating that provides mild surface hardness and corrosion resistance during drilling operations. The overall length is 4-1/4 inches with a flute length of 2-15/16 inches and a tanged shank diameter of 9/32 inch. This bit belongs to the Series 250AN and is a general-purpose tool suited for production and maintenance drilling tasks performed by machinists, millwrights, and general trade technicians.

The 47498 is designed for drilling cast iron and steel in general-purpose shop, fabrication, and field maintenance applications. The web-thinned, tapered-web construction reduces thrust at the point and improves chip clearance in ferrous materials. The spiral flute and right-hand cut make it compatible with standard drill presses, hand drills, and magnetic-base drills. It is sold as a single bit, making it a practical replacement or add-on to an existing set without committing to a full index.

Key Features

• Letter K size: 9/32 inch (0.2812 inch decimal), diameter tolerance -0.0010 to 0.0000 inches
• 118-degree standard point angle for general ferrous-material drilling
• High speed steel construction with oxide coating for surface protection
• Web-thinned, tapered web reduces entry thrust in cast iron and steel
• Regular spiral, 2-flute design promotes consistent chip evacuation
• Tanged shank, 1.3125-inch shank length, compatible with standard chuck systems

Compatibility

Rated for primary workpiece materials of cast iron and steel. General-purpose Series 250AN jobber-length bit compatible with standard 3-jaw drill chucks on corded drills, drill presses, and magnetic-base drills accepting a 9/32-inch shank.

Installation Notes

Install and remove this bit with the drill unplugged or locked out per standard LOTO procedure before changing tooling. Secure the tanged shank firmly in the chuck and verify runout before beginning a cut. Use appropriate cutting fluid or lubricant when drilling steel to extend tool life. Wear ANSI-rated eye protection; chip ejection from spiral flutes is a recognized hazard when drilling ferrous materials.