Chicago-latrobe 70225 Jobber Drill Bit 25/64 in Hss Tin

Product Description

The CHICAGO-LATROBE 70225 is a jobber-length twist drill bit designed for general-purpose drilling in metal fabrication and mechanical trade applications. Built from high speed steel with a titanium nitride (TiN) coating, the bit holds a 25/64 inch diameter and features a 118-degree standard point angle with a web-thinned tip to reduce thrust and improve centering. Overall length is 5.125 inches with a 3.75 inch flute length. The straight cylindrical shank fits standard three-jaw chucks on both hand-held drills and drill presses. This is a Series 150T bit rated for general-purpose use by machinists, pipefitters, electricians, and HVAC technicians who drill ferrous and non-ferrous stock daily.

The 70225 is suited for drilling cast iron and steel in both shop and field settings. Its regular spiral flute geometry and right-hand cut make it compatible with conventional drill presses, magnetic base drills, and handheld corded or cordless drills. The TiN coating extends surface hardness and reduces friction, making it a practical choice when drilling through structural steel, mechanical components, brackets, and pipe flanges. Single-piece packaging makes it easy to stock individually or as part of a jobsite kit.

Key Features

• 25/64 inch diameter with a tight tolerance of -0.0010 to 0.0000 inches for accurate hole sizing
• Titanium nitride (TiN) coating increases surface hardness and reduces heat buildup during cutting
• 118-degree standard point angle with web-thinned tip lowers entry thrust and improves bit self-centering
• Regular spiral, two-flute design promotes efficient chip evacuation in steel and cast iron
• Straight cylindrical shank fits standard drill chucks without adapters
• Meets DIN 338 dimensional standard for jobber-length drill bits

Compatibility

Designed as a general-purpose jobber-length drill bit for use in steel and cast iron workpieces. Compatible with any standard three-jaw drill chuck accepting a 25/64 inch straight cylindrical shank.

Installation Notes

Installation is performed by licensed tradespeople or qualified mechanics using a drill press or handheld power drill. Secure the workpiece before drilling and ensure the chuck is fully tightened on the shank before applying power. Use cutting fluid or coolant when drilling through thick steel stock to manage heat, even though this bit does not support through-coolant delivery. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed to maintain hole-size accuracy.