Chicago-latrobe 46464 Cobalt Jobber Drill Bit 4 Mm

Product Description

The CHICAGO-LATROBE 46464 is a cobalt jobber length drill bit engineered for high-performance drilling in hard and abrasive materials. Built to Series 550 standards, it features a 135-degree split point that reduces walking and requires no center punch on most surfaces. The gold finish indicates a cobalt steel construction, rated for heavy-duty use. At 4 mm in diameter with a 2.9528-inch overall length and a 1.6929-inch spiral flute, this bit delivers consistent chip evacuation in demanding applications. It meets DIN 338 and NAS 907 Type J specifications, making it suitable for aerospace and industrial trade use.

This drill bit is designed for right-hand cutting with a regular spiral flute pattern and a web-thinned, tapered web configuration that reduces thrust load during entry. Its primary rated workpiece material is titanium, though cobalt construction also handles stainless steel, heat-resistant alloys, and other hard metals common in industrial and aerospace maintenance environments. The straight-cylindrical shank fits standard drill chucks without adapters. This bit is typically used by machinists, maintenance technicians, and aerospace MRO professionals working with difficult-to-machine materials.

Key Features

• Cobalt steel construction with gold finish for heat resistance and extended tool life in hard materials
• 135-degree split point reduces bit walking and lowers entry thrust
• Web-thinned tapered web reduces cutting resistance at the tip
• Right-hand cut with regular spiral flute for efficient chip removal
• Meets DIN 338 and NAS 907 Type J standards for aerospace and industrial applications
• Straight-cylindrical shank fits standard drill chucks without modification

Compatibility

Rated for primary use in titanium and other hard, heat-resistant alloys. Designed to NAS 907 Type J and DIN 338 specifications for use in aerospace MRO, industrial manufacturing, and heavy-duty maintenance drilling applications where standard high-speed steel bits are insufficient.

Installation Notes

Install in a standard drill chuck sized for a 4 mm straight-cylindrical shank and confirm secure seating before operation. Disconnect and lock out all power to drilling equipment before changing bits. Use appropriate cutting fluid for titanium and hard alloy work to manage heat buildup and extend bit life. This bit is intended for use by qualified machinists or maintenance technicians familiar with feeds and speeds for cobalt tooling.