Chicago-Latrobe 54072 29/64 in 135° Cobalt Jobber Drill Bit

Chicago-Latrobe 54072 Cobalt Jobber Bit

The Chicago-Latrobe 54072 is a heavy-duty cobalt jobber length drill bit designed for professional metalworking. Its 135-degree split point ensures accurate starting and reduces walking on hard surfaces. The TiN coating increases surface hardness and extends tool life. This bit suits machinists and maintenance technicians drilling tough alloys.

29/64 inch capacity with .4531 decimal equivalent

The 29/64 inch fractional size provides a precise .4531 decimal equivalent for close-tolerance holes in steel and stainless steel. Cobalt construction handles high drilling temperatures without losing hardness. The jobber length offers standard reach for general machine and handheld use. Non-coolant-through design limits deep-hole chip evacuation in high-volume production.

TiN coating and split point geometry

The titanium nitride coating reduces friction and heat buildup during extended cutting cycles. Split point geometry eliminates the need for centre punching on most materials. Zero coolant holes mean external lubrication is required for optimal performance. These features combine to lower cycle times and improve hole finish quality.