Chicago-latrobe 46717 Cobalt Jobber Drill Bit No. 47

Product Description

The CHICAGO-LATROBE 46717 is a cobalt jobber-length drill bit designed for high-performance drilling in tough materials. Built to Series 550 standards and conforming to DIN 338 and NAS 907 Type J specifications, this bit carries an M42 cobalt steel grade construction with a gold oxide coating for heat and wear resistance. It features a 135-degree split point for self-centering starts without a center punch, and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. Overall length is 2 inches with a 1-inch flute length. Licensed tradespeople and machining professionals working with titanium and other hard alloys will find this bit a reliable production-duty choice.

The 46717 is sized to wire gauge No. 47, with a decimal diameter of 0.0785 inches and a straight-cylindrical shank of the same diameter. It is intended for use in hard and abrasion-resistant workpiece materials, with titanium listed as the primary target material. The regular spiral flute pattern and right-hand cut are suited to standard drill press, CNC, or hand-drill applications in metal fabrication, aerospace, and mechanical trade environments. The heavy-duty grade designation reflects suitability for production drilling rather than light-duty or occasional use.

Key Features

• M42 cobalt steel construction for drilling titanium and other hard metals
• 135-degree split point with web thinning for reduced thrust and self-centering entry
• Gold oxide coating provides heat resistance and extends service life in high-heat drilling
• Conforms to DIN 338 and NAS 907 Type J standards
• Regular right-hand spiral flute with tapered web for efficient chip removal
• Straight-cylindrical shank fits standard drill chucks without modification

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for applications requiring a No. 47 wire-gauge diameter in cobalt-grade tooling, conforming to NAS 907 Type J and DIN 338 specifications.

Installation Notes

Installation of this drill bit is performed by machinists, tool-and-die tradespeople, or licensed mechanical technicians. Secure the straight-cylindrical shank firmly in a keyed or keyless chuck before operation, and verify chuck runout is within acceptable tolerance for precision work. When drilling titanium or similarly tough alloys, use appropriate cutting fluid to manage heat buildup and prolong bit life. Do not exceed the recommended feed rate for the material being drilled, as cobalt bits are brittle under lateral stress.