Chicago-Latrobe 46677 #7 Cobalt Jobber Drill 135° Split Point

Chicago-Latrobe 46677 Cobalt Jobber Drill

The Chicago-Latrobe 46677 is a #7 cobalt jobber drill bit designed for heavy-duty drilling tasks. It suits machinists and technicians who need a durable bit for tough materials like stainless steel. The 135-degree split point improves accuracy by reducing bit walk on hard surfaces. This new bit offers a decimal equivalent of .2010 inches.

Split point geometry limits walk on hard alloys

The 135-degree split point centres the bit without a pilot hole, yet the design cannot prevent deflection in very deep holes. Cobalt steel resists heat better than high-speed steel, though it remains brittle if side loads are excessive. The jobber length provides standard reach but lacks the rigidity of shorter stub drills. No coolant holes mean external lubrication is essential for sustained cuts.

Cobalt material decides suitability for stainless

The HAWA cobalt construction is the single specification that determines if this bit matches the application. It outperforms standard steel on high-tensile alloys and work-hardening metals. Buyers drilling only mild steel, aluminium or wood will not benefit from the added cost and brittleness. Select this bit specifically when the workpiece demands cobalt-grade heat resistance.