Chicago-latrobe 46711 Jobber Drill Bit No. 41 Cobalt

Product Description

The CHICAGO-LATROBE 46711 is a jobber-length drill bit in wire gauge size No. 41, ground from M42 cobalt high-speed steel and finished with a gold oxide coating. It is designed for heavy-duty drilling in hard and abrasive materials, including titanium, stainless steel, and high-temp alloys. The split point at 135 degrees reduces walking on entry and lowers the thrust required to start a hole. At 0.0960 inches in diameter and 2-3/8 inches overall length, this bit fits standard drill chucks and is sized for precision work in tight tolerances. Licensed machinists, aerospace MRO technicians, and experienced metalworking tradespeople are the primary users.

This bit is suited for production and maintenance drilling in aerospace, industrial fabrication, and heavy mechanical applications. Its primary workpiece material rating is titanium, making it appropriate for aerospace structural work and high-performance metal fabrication where standard HSS bits wear prematurely. The 1-3/8-inch flute length provides adequate chip clearance for the drilling depths typical in sheet and plate stock. The straight cylindrical shank seats cleanly in keyed or keyless drill chucks across standard hand drills, drill presses, and CNC drilling operations. It ships individually but requires a minimum order of 12 units.

Key Features

• M42 cobalt HSS construction for extended tool life in hard and heat-resistant metals
• 135-degree split point reduces drill walk and lowers entry thrust on hard surfaces
• Gold oxide coating provides lubricity and additional heat resistance during cutting
• Web-thinned, tapered web geometry improves chip evacuation and reduces torque
• Regular spiral flute with right-hand cut for use in standard drill configurations
• Meets DIN 338 and NAS 907 Type J standards for dimensional and performance consistency

Compatibility

Rated for primary use in titanium per supplier specification. Conforms to NAS 907 Type J and DIN 338 standards. Series 550 jobber-length format with a 0.0960-inch straight cylindrical shank is compatible with standard drill chucks accepting wire-gauge tooling in the No. 41 size range.

Installation Notes

Installation is performed by machinists and metalworking technicians using a drill press, hand drill, or CNC drilling unit. Secure the shank fully in the chuck before operation and verify runout is within acceptable tolerance for precision work. Use appropriate cutting fluid or coolant when drilling titanium or stainless to extend tool life and manage heat buildup. Inspect the cutting edges before each use; cobalt bits can micro-chip if used on hardened surfaces beyond their rated grade range.