Chicago-Latrobe 42016 135 Degree Wide Land Parabolic Jobber Drill Bit

135 Degree Split-Point Geometry

The Chicago-Latrobe 42016 is a jobber-length drill bit with a 135-degree split point. It is designed for general-purpose drilling in metal and other materials. The split-point geometry reduces walking and improves centering at the start of the hole. This tool suits machinists and maintenance technicians who need reliable performance across a range of standard drilling tasks.

Parabolic Flute Chip Removal

The parabolic flute design with wide lands promotes efficient chip evacuation during deep-hole drilling. This geometry helps prevent chip packing and reduces heat buildup in the cutting zone. Without internal coolant holes, the bit relies on external lubrication or air blast for cooling. Users drilling deep holes in tough alloys must manage chip clearance manually to avoid binding.

TiCN Coated High-Speed Steel

The bit is manufactured from high-speed steel with a TiCN coating for increased surface hardness and wear resistance. The fractional 1/4 inch size and decimal equivalent of .2500 ensure compatibility with standard collets and chucks. The jobber length provides a balanced reach for most bench and handheld applications. The coating extends tool life in abrasive materials compared to uncoated alternatives.