Chicago-Latrobe 46617 Jobber Drill Bit 17/64 in Cobalt Split Point

17/64-inch Cobalt Jobber Drill Bit

The Chicago-Latrobe 46617 is a cobalt jobber-length drill bit sized at 17/64 inch with a decimal equivalent of .2656. It serves machinists and maintenance technicians who need a durable fractional-inch bit for drilling hard metals such as stainless steel and high-strength alloys. The split-point geometry reduces walking and improves hole accuracy in demanding applications.

Split-point geometry for stiff tooling setups

The 135-degree split point centers the bit without a centre punch, saving time on drill presses and rigid CNC fixtures where workpiece clamping is already fixed. Cobalt construction resists heat buildup during continuous cutting, so the bit stays sharp longer in tough materials. No coolant-through channels are present, so external flood or mist coolant must be supplied by the machine.

Sustained cutting in hard alloys without premature

Under prolonged load the cobalt substrate maintains hardness at elevated temperatures, allowing consistent feed rates through work-hardening steels. The straw-bronze surface finish indicates the heat-treatment condition rather than a coating that can wear away. The jobber-length flute clears chips adequately for through-holes at standard depths, but deep-hole drilling may require peck cycles to prevent packing.