Chicago-latrobe 43607 7/64 in Jobber Drill Bit Ticn Hss

Product Description

The CHICAGO-LATROBE 43607 is a jobber-length twist drill bit designed for high-performance drilling in demanding trade and industrial applications. Built from M7 high speed steel with a TiCN (titanium carbonitride) coating, it delivers improved wear resistance and longer tool life compared to uncoated HSS bits. The bit measures 7/64 inch (0.1094 inch) in diameter with a 135-degree split point that reduces walking on contact and requires no center punch on most surfaces. Overall length is 2-5/8 inches with a 1-1/2-inch flute length. A tapered web and web-thinned geometry reduce cutting forces and improve chip evacuation. Licensed HVAC techs, plumbers, electricians, and pipefitters will find this bit sized right for pilot holes, sheet metal, and conduit work.

The 43607 is suited for drilling cast iron, stainless steel, and carbon steel in both residential and commercial settings. The straight-cylindrical shank seats securely in standard 3-jaw chucks on corded or cordless drills and drill presses. The 2-flute spiral configuration and regular spiral type make it appropriate for general-purpose through-hole and blind-hole drilling where chip clearance in tight-diameter work is needed. It meets NAS 907 Type B standards, making it appropriate for aerospace-grade and heavy-duty fabrication workflows as well.

Key Features

• M7 high speed steel construction rated for heavy-duty drilling in ferrous metals
• TiCN coating increases surface hardness and extends tool life versus uncoated HSS
• 135-degree split point starts on contact without center punching on most materials
• Web-thinned, tapered web geometry reduces thrust and improves chip flow
• Straight-cylindrical shank fits standard 3-jaw chucks without adapters
• Meets NAS 907 Type B specification for consistent dimensional tolerances

Compatibility

Designed for drilling cast iron, stainless steel, and carbon steel. Fits any standard drill or drill press chuck accepting a 7/64-inch straight-cylindrical shank. Diameter tolerance is -0.0005 to 0.0000 inch per NAS 907 Type B.

Installation Notes

This bit is installed and used by electricians, HVAC technicians, plumbers, and general tradespeople. Ensure the workpiece is securely clamped before drilling to prevent rotation or movement. Use appropriate cutting fluid or coolant when drilling stainless steel or hardened alloys to manage heat buildup, as TiCN coatings improve but do not eliminate thermal limits. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed to maintain dimensional accuracy.