Chicago-latrobe 70140 Jobber Drill Bit Wire 40 Hss Tin

Product Description

The CHICAGO-LATROBE 70140 is a jobber length drill bit in wire gauge size 40 (0.0980 inches), manufactured from high speed steel with a titanium nitride (TiN) coating. It features a 118-degree standard point angle, a two-flute regular spiral configuration, and a web-thinned, tapered web design that reduces thrust and improves chip evacuation. At 2.375 inches overall length with a 1.375-inch flute length, this bit fits standard drill chucks via its straight-cylindrical shank. Machinists, maintenance technicians, and metalworking tradespeople use this bit for general-purpose drilling in ferrous and non-ferrous materials.

This drill bit is designed for right-hand cutting in cast iron and steel, making it suited for light production, maintenance, and repair drilling tasks in fabrication shops, mechanical rooms, and field service environments. The Series 150T designation indicates conformance to DIN 338 jobber length standards. The TiN coating extends tool life by reducing friction and increasing surface hardness compared to uncoated HSS. It is sold individually but requires a minimum order of 12 units.

Key Features

• Wire gauge size 40, 0.0980-inch diameter with a tight tolerance of -0.0005 to 0.0000 inches
• Titanium nitride (TiN) coating for extended tool life and reduced friction
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust
• Right-hand cut, two-flute regular spiral for efficient chip removal
• Straight-cylindrical shank, 1.0 inch shank length, compatible with standard drill chucks
• Conforms to DIN 338 jobber length standard (Series 150T)

Compatibility

Designed for general-purpose drilling in cast iron and steel workpieces. Fits any standard drill chuck accepting a 0.0980-inch straight-cylindrical shank.

Installation Notes

Install in a standard keyless or keyed drill chuck; ensure the shank is fully seated and the chuck is tightened before operation. Use appropriate cutting fluid or coolant when drilling steel to preserve coating life and maintain dimensional accuracy. Secure the workpiece firmly before drilling to prevent bit walking on entry. Inspect the cutting edges before each use and replace any bit showing signs of chipping or dulling to maintain hole tolerance.