Chicago-Latrobe 47716 135° Cobalt Jobber Drill Bit 1/4 in

Chicago-Latrobe 47716 Cobalt Drill Bit

The Chicago-Latrobe 47716 is a jobber-length drill bit made from HAWA cobalt steel with a 135-degree split point. It measures 1/4 inch with a decimal equivalent of .2500 and features a straw-bronze finish. Designed for heavy-duty drilling tasks in metal, it requires no coolant through holes. This bit suits professional workshops and maintenance crews needing reliable performance in tough alloys.

Machinists drilling stainless or high-tensile steel

This bit serves machinists and fabricators who need a durable cobalt tool for hard metals. The split point reduces walking on hardened surfaces. It is not for buyers who want a coated bit for high-speed production runs, nor for those needing coolant-fed drilling for deep holes. Woodworkers and general DIY users will find standard HSS bits more economical for softer materials.

Cobalt steel holds edge under sustained heat

Under continuous load the cobalt substrate resists softening better than standard high-speed steel, keeping the cutting lips sharp during extended drilling cycles. The 135-degree point angle distributes pressure evenly, reducing chatter when feed rates stay consistent. Without internal coolant channels, heat builds in deep cuts, so periodic withdrawal clears chips and preserves tool life.