Chicago-latrobe 41682 Jobber Drill Bit 12 Hss Tin

Product Description

The CHICAGO-LATROBE 41682 is a jobber-length drill bit designed for high-performance metal drilling in demanding trade and industrial applications. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, it delivers improved surface hardness and extended tool life compared to uncoated HSS bits. The bit measures 0.1890 inches in diameter (wire size 12), with an overall length of 3.5 inches and a flute length of 2.3125 inches. The 135-degree split point reduces walking on entry and lowers thrust requirements, making it well suited for hand-held and drill-press work on ferrous materials. Licensed HVAC technicians, pipefitters, plumbers, and general maintenance trades reach for bits like this when drilling pilot holes, access openings, and fastener clearance holes in metal.

This bit is rated for use in cast iron, stainless steel, and steel. The 135-degree split point with web thinning handles the work-hardening tendency of stainless steel better than a conventional 118-degree point. The straight-cylindrical shank with a diameter of 1.1875 inches seats in standard three-jaw drill chucks without modification. The regular spiral flute and tapered web configuration promote chip evacuation in deep holes. It meets NAS 907 Type B specification, making it appropriate for aerospace-influenced maintenance work where dimensional tolerances are critical. Diameter tolerance is held to -0.0007 to 0.0000 inches.

Key Features

• TiN coating increases surface hardness and extends bit life on ferrous materials
• 135-degree split point with web thinning reduces walking and lowers drilling thrust
• High speed steel construction handles cast iron, stainless steel, and steel
• Straight-cylindrical shank fits standard three-jaw drill chucks
• Meets NAS 907 Type B specification with a tight diameter tolerance of -0.0007 to 0.0000 inches
• Tapered web and regular spiral flute support chip clearing in deep holes

Compatibility

Designed for use in standard three-jaw drill chucks accepting a straight-cylindrical shank. Rated for drilling cast iron, stainless steel, and carbon steel. Suitable for drill press, magnetic drill, and hand-held electric drill applications where a jobber-length HSS bit is specified.

Installation Notes

Secure the shank firmly in the chuck before drilling and verify the workpiece is clamped or fixtured. When drilling stainless steel, use a low speed and consistent feed pressure to avoid work hardening the material. Allow chips to clear regularly on deep holes to prevent flute packing and bit breakage. Wear appropriate eye and hand protection per shop safety requirements.