Chicago-latrobe 41609 Jobber Drill Bit 9/64 in Tin Hss

Product Description

The CHICAGO-LATROBE 41609 is a jobber length drill bit designed for high-performance drilling in ferrous metals and hard alloys. It is manufactured from high speed steel with a titanium nitride (TiN) coating, which extends tool life and reduces friction during cutting. The 135-degree split point reduces walking on entry and requires less thrust force compared to conventional 118-degree points. At 2-7/8 inches overall length with a 1-3/4 inch flute length, this bit fits standard drill chucks in corded and cordless tools used by machinists, pipefitters, electricians, and general trade professionals working with ferrous materials.

This drill bit is intended for use in cast iron, stainless steel, and carbon steel applications. It is well suited to production drilling and field work where cut quality and bit longevity in hard materials matter. The straight-cylindrical shank seats securely in standard three-jaw chucks. The regular spiral flute geometry provides reliable chip evacuation in through-hole and blind-hole drilling. It is a single-piece unit sold individually, making it a practical replacement or addition to a job box kit.

Key Features

• 135-degree split point reduces entry walking and lowers required thrust force
• Titanium nitride (TiN) coating increases surface hardness and extends cutting life
• Web-thinned, tapered web construction reduces heat buildup and improves chip flow
• Right-hand cut with regular spiral flute for consistent chip evacuation
• Straight-cylindrical shank fits standard drill chucks without modification
• Meets NAS 907 Type B specification for dimensional and performance consistency

Compatibility

Designed for drilling cast iron, stainless steel, and carbon steel. Part of the CHICAGO-LATROBE Series 150ASP-TN. Conforms to NAS 907 Type B specification. Fits any standard drill chuck accepting a straight-cylindrical shank at the listed shank diameter.

Installation Notes

Install in a properly rated drill press, hand drill, or drill driver with a three-jaw chuck sized to accept the shank. Ensure the workpiece is securely clamped before drilling to prevent rotation and bit deflection. Use cutting fluid when drilling stainless steel or cast iron to manage heat and extend bit life. Inspect the cutting edges for wear before each use and replace the bit if the TiN coating is worn through at the point or if chipping is visible on the flutes.