Chicago-latrobe 70146 Jobber Drill Bit Wire 46 Hss Tin

Product Description

The CHICAGO-LATROBE 70146 is a jobber length drill bit designed for general-purpose drilling in metalworking applications. Ground from high speed steel with a titanium nitride (TiN) coating, it delivers improved wear resistance and longer service life compared to uncoated tooling. The wire gauge size is 46, corresponding to a decimal diameter of 0.0810 inches. The 118-degree standard point angle is web-thinned with a tapered web configuration for easier entry and reduced thrust. Overall length is 2.125 inches with a 1.125-inch spiral flute. It belongs to the Chicago-Latrobe Series 150T and conforms to DIN 338 standards. This bit is sold individually but must be ordered in multiples of 12.

This drill bit is suited for drilling cast iron and steel in production or maintenance environments. The right-hand spiral flute design evacuates chips efficiently during through-hole and blind-hole operations. The straight cylindrical shank seats in standard keyless or keyed drill chucks without modification. It is a practical option for machinists, pipefitters, electricians, and HVAC technicians who regularly drill small-diameter holes through ferrous material or structural steel.

Key Features

• Wire size 46 (0.0810 inches decimal) for precision small-diameter drilling
• TiN coating increases surface hardness and reduces friction against ferrous workpieces
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Right-hand, regular spiral flute pattern promotes consistent chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters
• Conforms to DIN 338 dimensional standard for jobber length tooling

Compatibility

Designed as a general-purpose jobber length drill bit for use in cast iron and steel. Compatible with any standard drill chuck accepting a 0.0810-inch straight cylindrical shank.

Installation Notes

Secure the shank fully in the drill chuck before operation and verify runout with a dial indicator on precision setups. Use appropriate cutting fluid or coolant when drilling steel at higher feed rates to preserve coating life, even though this bit does not support internal coolant through. Follow applicable shop safety standards and machine guarding requirements when operating drill presses or hand drills. Inspect the cutting edges and TiN coating for wear before each use; discard or resharpen when point geometry is compromised.