Chicago-Latrobe 46793 W 5-1/8" Cobalt 135° Jobber Drill Bit

Chicago-Latrobe 46793 Cobalt Jobber Bit

This Chicago-Latrobe 46793 drill bit is a jobber-length tool made from cobalt steel for professional and serious DIY use. It handles drilling in hard metals such as stainless steel and high-strength alloys where standard high-speed steel wears quickly. The 135-degree split point reduces walking and starts holes cleanly without a centre punch. It fits any standard drill chuck that accepts its shank diameter.

Build fit: chuck compatibility and material reach

The bit mounts directly in a three-jaw chuck matched to its letter-size W shank, so no special adapter or coolant system is required. Its non-coolant-through design keeps the setup simple for handheld or press work. Cobalt construction holds an edge longer in abrasive or heat-resistant metals, freeing the operator from frequent bit changes during production runs. The straw-bronze surface finish signals the heat treatment that gives the steel its hot hardness.

Suited for metalworkers needing heat-resistant

Machinists, maintenance technicians and fabricators who regularly drill tough alloys will benefit from the cobalt substrate and split-point geometry. Users who mainly drill wood, plastic or soft aluminium will not see a cost advantage over standard high-speed steel bits. Buyers requiring coolant-fed drilling or a different point angle should look at other tooling options.