Cleveland Golf 19/64 Cobalt Parabolic Drill Bit 135° 2075

Cleveland Golf 19/64 Cobalt Drill Bit

The Cleveland Golf 19/64 cobalt parabolic drill bit is a high-performance cutting tool built for precision metal drilling. Its 135-degree notch point and straw-bronze finish suit professional machinists and serious DIY users who need reliable hole-making in tough alloys. The jobber-length design fits standard drill chucks for everyday workshop use.

Parabolic Flute Chip Removal Limits

The parabolic flute geometry improves chip evacuation in deeper holes compared to standard twist drills. However, the non-coolant-through design means heat builds up faster during sustained high-speed drilling in stainless steel or titanium. Operators must use peck cycles and external flood coolant to prevent work hardening and premature edge wear on the cobalt substrate.

Installation And Common Issues

The 19/64 inch shank seats directly into matching collets or three-jaw chucks without adapters. Runout increases if the chuck jaws are worn or the shank is not cleaned of protective oil before clamping. The 135-degree point can walk on curved surfaces, so a centre punch mark or spotting drill is recommended to ensure accurate hole placement.