Chicago-Latrobe 42023 135 Degree 23/64 in Jobber Drill Bit

Chicago-Latrobe 42023 135° Split-Point Jobber Bit

This Chicago-Latrobe 42023 jobber drill bit is made from High Speed Steel with a TiCN coating for extended wear resistance. The 135-degree split-point tip starts on contact and reduces walking on metal surfaces. It is designed for general-purpose drilling in steel, cast iron and similar materials where coolant-through delivery is not required.

Suited for metalworkers needing a fractional 23/64

The fractional 23/64 inch diameter (decimal equivalent .3594) suits machinists and maintenance technicians who drill standard bolt clearance or tapping holes in ferrous metals. The parabolic flute profile aids chip evacuation in deeper holes. Buyers who need coolant-through capability or a different diameter should look at other options.

Straightforward chuck installation

The straight shank fits any standard three-jaw drill chuck or collet sized for the shank diameter. Tighten securely to prevent slippage under load. Common issues include premature dulling if feed pressure is too light, chip packing if the flutes are not cleared periodically, and tip damage if the workpiece moves during entry.