Chicago-latrobe 47970 Cobalt Drill Bit 5mm Tin 135 Deg

Product Description

The CHICAGO-LATROBE 47970 is a cobalt jobber length drill bit designed for high-performance drilling in demanding materials. Coated with titanium nitride (TiN), it provides enhanced surface hardness and heat resistance to extend tool life in production environments. The bit features a 135-degree split point for self-centering entry and reduced thrust, a two-flute regular spiral configuration, and a straight-cylindrical shank measuring 5 mm in diameter. Overall length is 3.39 inches with a flute length of 2.05 inches. It is built to NAS 907 Type B standards and is classified as heavy duty grade, making it a reliable choice for machinists and industrial tradespeople working with titanium and other hard materials.

This drill bit is suited for production and maintenance drilling operations where tool longevity and hole accuracy are critical. The TiN coating reduces friction and buildup on the cutting edge, which is especially important when drilling titanium, stainless steel, and other high-strength alloys. The Series 550ASP-TN designation identifies it within the CHICAGO-LATROBE cobalt high-performance line. It is typically used in machine shops, fabrication facilities, and MRO applications where NAS-spec tooling is required. The straight-cylindrical shank fits standard drill chucks without adapters.

Key Features

• Cobalt construction for heat and wear resistance in hard-material drilling
• Titanium nitride (TiN) coating reduces friction and extends cutting edge life
• 135-degree split point enables self-centering and lowers required thrust
• Web-thinned, tapered web configuration for improved chip evacuation
• Meets NAS 907 Type B specification for aerospace and industrial tooling standards
• Right-hand cut, two-flute regular spiral for consistent chip flow

Compatibility

Designed as a replacement or standard-use jobber length drill bit for applications requiring NAS 907 Type B compliance, with a size range of 0.1500 to 0.2000 inches (5.00 to 6.00 mm), suitable for use in any standard drill chuck accepting a 5 mm straight-cylindrical shank.

Installation Notes

This bit is installed by machinists or maintenance technicians in standard drill chucks or CNC toolholders rated for the shank diameter. Ensure the drill press or machine is powered down and secured before changing tooling. No coolant-through capability is present on this bit, so external coolant or cutting fluid should be applied when drilling titanium or high-strength alloys to manage heat. Follow applicable shop safety standards and manufacturer feed-and-speed guidelines for cobalt tooling when setting up the operation.