Chicago-latrobe 70135 Jobber Drill Bit Wire 35 Hss Tin

Product Description

The CHICAGO-LATROBE 70135 is a jobber-length twist drill bit sized to wire gauge 35, with a decimal diameter of 0.1100 inches. It is manufactured from high speed steel with a titanium nitride (TiN) coating that extends cutting edge life and reduces friction in ferrous materials. The bit features a standard 118-degree point angle, a regular spiral flute, and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. Overall length is 2-5/8 inches with a 1-1/2-inch flute length. The straight-cylindrical shank measures 0.1100 inches in diameter and 1.125 inches in length. This bit belongs to the Chicago-Latrobe Series 150T and conforms to DIN 338 standards.

The 70135 is suited for general-purpose drilling in cast iron and steel. Typical applications include mechanical, HVAC, plumbing, and electrical trade work where small-diameter precision holes are required in ferrous workpieces. The 0.1100-inch diameter is commonly used for pilot holes, wire pass-throughs, and tapping pre-drill operations where tight diameter tolerances are critical. Diameter tolerance is held to -0.0005 to 0.0000 inches, making it appropriate for light-production and maintenance environments.

Key Features

• Wire gauge 35 sizing at 0.1100 inches decimal diameter for precise small-hole applications
• Titanium nitride (TiN) coating increases surface hardness and extends tool life in steel and cast iron
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust and cleaner entry
• Right-hand cut, regular spiral flute for efficient chip removal in through-hole drilling
• Straight-cylindrical shank compatible with standard drill chucks
• Conforms to DIN 338 for consistent jobber-length geometry

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard 3-jaw drill chucks accepting a 0.1100-inch straight-cylindrical shank. Primary workpiece materials listed by the manufacturer are cast iron and steel.

Installation Notes

Install the bit securely in a drill chuck rated for the intended speed and torque before operation. Ensure the chuck key is removed and the workpiece is firmly clamped before drilling. For best results in steel, use a cutting fluid or lubricant to reduce heat buildup and prolong coating life. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.