Chicago-latrobe 47318 Jobber Drill 7.90mm 118deg Hss

Product Description

The CHICAGO-LATROBE 47318 is a high speed steel jobber-length drill bit designed for general-purpose drilling in metal fabrication and machining applications. It measures 7.90 mm (0.3110 inch) in diameter with a 118-degree standard point angle and an overall length of 117.00 mm (4.606 inches). The oxide finish provides basic surface protection and reduces friction during cutting. A web-thinned, tapered web design reduces thrust at the tip and improves chip clearance. This drill bit is a standard item for machinists, maintenance technicians, and fabricators working with ferrous metals.

This drill bit is suited for drilling cast iron and steel in production and maintenance environments. The right-hand spiral flute with regular helix promotes consistent chip evacuation in through-hole and blind-hole drilling. The straight-cylindrical shank fits standard drill chucks without adapters. It conforms to DIN 338 specifications, making it a recognized standard for jobber-length twist drills across industrial and trade applications.

Key Features

• 7.90 mm (0.3110 inch) diameter with tight tolerance of -0.0010 to 0.0000 inches
• 118-degree standard point angle for general-purpose metal drilling
• Web-thinned tapered web reduces cutting thrust and improves starts
• Oxide coating provides surface protection and reduces friction
• Right-hand cut with regular spiral flute for reliable chip removal
• Conforms to DIN 338 specification for jobber-length twist drills

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard drill chucks accepting straight-cylindrical shanks; primary workpiece materials are cast iron and steel.

Installation Notes

This drill bit is installed by machinists and maintenance technicians using standard 3-jaw or keyless drill chucks. Always secure the workpiece before drilling and verify chuck grip on the straight shank before operation. Use appropriate cutting fluid when drilling steel to extend bit life and improve hole quality. Inspect the cutting edges before each use and replace when chipping or wear is observed.