Chicago-Latrobe 46627 Jobber Drill Bit 27/64 in 135° Split Point Cobalt

Chicago-Latrobe 46627 Cobalt Jobber Bit

This Chicago-Latrobe 46627 drill bit is a cobalt jobber-length tool sized at 27/64 inch with a 135-degree split point. It is built for machinists and maintenance technicians who need a durable bit for drilling hard metals such as stainless steel and high-strength alloys. The cobalt construction provides high heat resistance and extended wear life in demanding applications.

Split-point geometry reduces walking

The 135-degree split point is self-centring, so the bit starts accurately on contact without a centre punch. This saves setup time on a drill press or handheld drill and reduces the risk of damaging the workpiece surface. Because the bit is non-coolant-through with zero coolant holes, the operator must supply cutting fluid externally when drilling deep holes or tough materials to manage heat and chip evacuation.

27/64 inch fractional capacity

The bit creates a hole with a decimal equivalent of .4219 inch, suitable for tapping 1/2-13 threads or clearing specific fastener shanks. Cobalt steel handles high cutting temperatures better than high-speed steel, giving more holes per sharpening in abrasive or work-hardening metals. It is not designed for non-ferrous materials like aluminium or brass where the aggressive split point can grab, nor for coolant-through spindles that require internal fluid delivery.