Cleveland Golf C14220 Cobalt Drill Bit 3/8 in 135° Split Point

Cobalt Drill Bit for Screw Machines

The Cleveland Golf C14220 is a cobalt steel drill bit built for screw-machine work. Its 135-degree split point reduces walking and starts holes cleanly in tough alloys. The right-hand cutting direction suits standard machine setups. This accessory targets machinists and maintenance crews who need repeatable accuracy in high-speed drilling.

Practical Limits of the 135-Degree Split Point

The 135-degree angle excels in hard materials such as stainless steel and titanium but can wander in very soft stock without a centre punch. Cobalt steel holds an edge longer than high-speed steel yet remains brittle under heavy side loads. The bit has no coolant-through channel, so external flood or mist cooling is required for deep holes. Decimal size .3750 fixes the diameter with no metric alternative.

Upgrade from Standard High-Speed Steel Bits

Shops moving up from general-purpose HSS bits gain longer tool life and better heat resistance in abrasive alloys. The jump is worth it when drilling work-hardening metals or running unattended cycles where premature wear scraps parts. It does not replace carbide for extreme speeds or rigid CNC rigs, and it cannot serve left-hand cutting operations. Buyers needing coolant-through capability or larger diameters must look elsewhere.