Chicago-latrobe 70226 Jobber Drill Bit 13/32 in Hss Tin

Product Description

The CHICAGO-LATROBE 70226 is a jobber-length twist drill bit designed for general-purpose hole-making in cast iron and steel. 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. The bit measures 13/32 inches (0.4062 inches decimal) in diameter with a 5-1/4 inch overall length and a 3-7/8 inch flute length. A 118-degree standard point angle and web-thinned geometry reduce entry force and help center the bit on the workpiece. This is a right-hand cut, two-flute spiral design in CHICAGO-LATROBE Series 150T, conforming to DIN 338 standards.

The 70226 suits production and maintenance drilling operations in metal fabrication shops, HVAC mechanical rooms, plumbing rough-in, and electrical panel work where steel and cast iron are the primary workpiece materials. The straight-cylindrical shank seats in standard 3-jaw drill chucks on both handheld and bench-mounted drills. At a 13/32 inch diameter, it is commonly used for pilot holes, conduit knockouts, and fastener clearance holes in structural steel and cast iron components.

Key Features

• TiN coating increases surface hardness and reduces friction for longer tool life in ferrous metals
• 118-degree standard point angle with web-thinned geometry reduces thrust and improves self-centering
• Two-flute regular spiral design provides efficient chip evacuation in steel and cast iron
• Tapered web configuration adds rigidity along the flute length
• Straight-cylindrical shank fits standard drill chucks without adapters
• Meets DIN 338 dimensional standards for jobber-length drill bits

Compatibility

Designed as a general-purpose jobber-length drill bit for use in cast iron and steel. Compatible with any standard 3-jaw drill chuck that accepts a 13/32 inch straight-cylindrical shank.

Installation Notes

Installation is performed by machinists, fabricators, and trade technicians using standard handheld or stationary drilling equipment. Secure the straight-cylindrical shank firmly in the chuck before operation and verify the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or lubricant when drilling steel to reduce heat buildup and extend bit life. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.