Chicago-latrobe 46726 Cobalt Jobber Drill Bit 56

Product Description

The CHICAGO-LATROBE 46726 is a cobalt jobber-length drill bit in wire gauge size 56, with a decimal diameter of 0.0465 inches and a 135-degree split point angle. Built from M42 cobalt high-speed steel with a gold oxide coating, this bit is engineered for high-performance drilling in hard and abrasive materials. The web-thinned, tapered-web construction reduces thrust at entry and improves chip evacuation. Overall length is 1.75 inches with a 0.375-inch flute length and a straight cylindrical shank. It meets DIN 338 and NAS 907 Type J standards, making it suitable for aerospace and precision metalworking applications.

The 46726 is designed for drilling titanium, hardened steels, stainless, and other difficult-to-machine alloys where standard HSS bits fail prematurely. The regular spiral, two-flute configuration paired with the gold oxide finish reduces heat buildup and extends tool life in production drilling environments. This bit is a fit for machine shops, MRO operations, aerospace assembly lines, and field technicians working with high-strength fastener holes. No coolant-through capability is required, and the bit is suitable for use in standard drill presses, CNC machines, and hand-held pneumatic or electric drill equipment.

Key Features

• M42 cobalt HSS construction for durability in hard and exotic alloys including titanium
• 135-degree split point reduces walking and cutting thrust on entry
• Gold oxide coating reduces friction and heat at the cutting edge
• Web-thinned tapered web improves chip clearance and penetration efficiency
• Meets DIN 338 and NAS 907 Type J standards for aerospace-grade dimensional tolerances
• Right-hand cut, regular spiral, two-flute design for consistent chip evacuation

Compatibility

Designed for use in standard jobber-length drill chucks accepting a 0.0465-inch straight cylindrical shank. Primary workpiece material is titanium per supplier specification; also suited for stainless steel, hardened alloys, and other high-strength metals requiring cobalt-grade tooling.

Installation Notes

This bit is installed by a machinist or tool-and-die technician in a drill press, CNC machining center, or hand-held drill rated for small-diameter bits. Secure the straight cylindrical shank firmly in the chuck before operation to prevent runout. Diameter tolerance is -0.0005 to 0.0000 inches, so inspect the shank seating and chuck condition before use in precision-fit applications. Cutting fluid or cutting oil is recommended when drilling titanium or stainless to control heat, even though the bit does not have coolant-through capability.