Chicago-latrobe 54053 Cobalt Jobber Drill Bit 11/64 in

Product Description

The CHICAGO-LATROBE 54053 is a cobalt jobber-length drill bit designed for high-performance drilling in tough materials. Built from M42 cobalt high-speed steel and coated with titanium nitride (TiN), it delivers extended tool life in demanding applications. The 135-degree split point reduces walking and cutting pressure at entry, making it well-suited for hard or work-hardening metals. The bit measures 3-1/4 inches overall with a 2-1/8-inch flute length and a straight-cylindrical shank sized at 11/64 inch. It is sold individually and is a fit for trades that require precision drilling in ferrous and stainless materials.

This bit is intended for drilling stainless steel and steel in fabrication, mechanical, and maintenance applications where standard HSS bits wear prematurely. The tapered web with web thinning reduces thrust load and chip packing in deep-hole scenarios. The regular spiral flute promotes efficient chip evacuation. It conforms to DIN 338 and NAS 907 Type J standards, making it appropriate for aerospace, industrial, and precision mechanical work where material traceability and dimensional tolerances matter.

Key Features

• M42 cobalt steel construction for heat and wear resistance in hard metals
• TiN coating extends cutting life and reduces surface friction
• 135-degree split point reduces thrust and prevents bit walking on entry
• Web-thinned tapered web lowers cutting resistance in deep holes
• Diameter tolerance held to -0.0007 to 0.0000 inches for precision fit
• Complies with DIN 338 and NAS 907 Type J specifications

Compatibility

Designed as a heavy-duty OEM-style jobber drill bit for use in stainless steel and steel applications. Conforms to NAS 907 Type J and DIN 338 standards for use in applications requiring certified tooling.

Installation Notes

Install in a compatible drill chuck rated for the straight-cylindrical shank diameter. Machinists and maintenance technicians should verify spindle speed and feed rate are appropriate for cobalt bits working in stainless steel or hardened materials. Secure the workpiece before drilling to prevent movement. Coolant-through operation is not supported on this bit; use cutting fluid applied externally when drilling deep holes in hard alloys.