Chicago-latrobe 46626 Cobalt Drill Bit 13/32 in Series 550

Product Description

The CHICAGO-LATROBE 46626 is a cobalt jobber length drill bit engineered for demanding metal-cutting applications where standard high-speed steel falls short. Built to Series 550 specifications and conforming to DIN 338 and NAS 907 Type J standards, this bit carries an M42 cobalt material grade that retains hardness at elevated cutting temperatures. The 135-degree split point reduces thrust and self-centers on entry, eliminating the need for a center punch on most surfaces. A gold oxide finish adds lubricity and helps resist heat buildup. At 5.25 inches overall length with a 3.875-inch flute, this is a production-grade tool suited for maintenance shops, fabrication, and aerospace-adjacent trade work.

The 46626 is rated for primary use in titanium and is well-suited for other hard and abrasive metals including stainless steel and high-nickel alloys. The regular spiral, two-flute design promotes consistent chip evacuation in deep-hole applications. The straight cylindrical shank at 0.4063 inches diameter seats securely in standard drill chucks and drill press spindles. This bit is appropriate for use by machinists, maintenance mechanics, and metalworking tradespeople requiring a heavy-duty, high-performance drill bit in the 0.4062-inch diameter class.

Key Features

• M42 cobalt construction maintains cutting hardness under high-heat conditions
• 135-degree split point self-centers and reduces feed pressure on entry
• Gold oxide coating adds lubricity and extends tool life in hard materials
• Web-thinned tapered web improves chip flow and reduces torque requirements
• Meets DIN 338 and NAS 907 Type J standards for dimensional and performance consistency
• Two-flute regular spiral design supports efficient chip evacuation in deep holes

Compatibility

Designed as an OEM-specification replacement or direct-use drill bit conforming to NAS 907 Type J and DIN 338 standards, suitable for standard drill chucks accepting a 0.4063-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists or qualified metalworking tradespeople using a drill press, mill, or hand drill with a compatible chuck. Secure the shank fully in the chuck before operation and verify spindle speed is appropriate for the workpiece material and bit diameter. Use cutting fluid when drilling titanium, stainless steel, or other hard alloys to extend tool life and control heat. Coolant-through is not supported on this bit.