Chicago-latrobe 41686 Jobber Drill Bit Size 16 Hss Tin

Product Description

The CHICAGO-LATROBE 41686 is a jobber-length drill bit in wire gauge size 16, measuring 0.1770 inches in diameter, designed for high-performance drilling in demanding trade and industrial applications. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, it delivers increased surface hardness and extended tool life compared to uncoated HSS. The 135-degree split point reduces walking on contact and requires no center punch on most surfaces. Overall length is 3.375 inches with a flute length of 2.1875 inches. Licensed machinists, maintenance technicians, and metalworking professionals are the primary installers of this bit.

The 41686 is suited for drilling cast iron, stainless steel, and carbon steel in both shop and field environments. The right-hand spiral flute with regular helix efficiently evacuates chips during through-hole and blind-hole operations. The straight cylindrical shank, measuring 0.1770 inches in diameter and approximately 1.1875 inches in length, seats directly in standard drill chucks without an adapter. This bit fits within the Series 150ASP-TN family and conforms to NAS 907 Type B specification, making it appropriate for aerospace-adjacent maintenance and precision metalwork where dimensional tolerance control matters.

Key Features

• Wire gauge size 16 (0.1770 inches) with tight diameter tolerance of -0.0007 to 0.0000 inches for consistent hole sizing
• 135-degree split point with web thinning reduces thrust force and eliminates center-punch requirement on flat stock
• Titanium nitride (TiN) coating increases surface hardness and heat resistance for longer tool life in steel and cast iron
• Right-hand cut, 2-flute regular spiral design promotes efficient chip evacuation in both through and blind holes
• Tapered web configuration adds rigidity while the web-thinned geometry lowers cutting resistance
• Meets NAS 907 Type B standard, suitable for precision and aerospace maintenance applications

Compatibility

Rated for use in cast iron, stainless steel, and carbon steel workpieces. Designed for use in standard drill chucks accepting straight cylindrical shanks. Part of the CHICAGO-LATROBE Series 150ASP-TN jobber-length drill bit line conforming to NAS 907 Type B specification.

Installation Notes

Installation is performed by machinists, maintenance mechanics, or metalworking technicians using standard drill presses, hand drills, or CNC drilling equipment. Secure the shank fully in the chuck and verify runout before drilling. Apply appropriate cutting fluid when working stainless steel or hardened alloys to manage heat buildup and extend bit life. Inspect the cutting edges for wear or chipping before each use and replace the bit if the TiN coating is breached at the cutting tip.