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Drill Type


Aircraft Drills	Combination Drill & Tap	Drill Set	Extra Long Drills	Hole Enlarge Drills	Jobber Drills

Miniature Drills	Reduced Shank Drills	Screw Machine Drills	Spade Drills	Spotting Drills	Step Drills

Straight Flute & Die Drills	Taper Length Drills	Taper Shank Drills	Wood Drills

Drill Bit Materials


HSS	M35 M42 Cobalt	Powdered Metal	Solid Carbide
General purpose on mild steels and non-ferrous materials such as aluminum, brass, bronze and copper More tolerated in low rigidity setup	Better wear resistance, higher hardness and toughness than HSS Very little chipping under heavy cutting conditions, allowing the cobalt drill to run faster than HSS Cost-effective for machining cast iron, heat-treated steels, and titanium alloys More tolerated in low rigidity setup	Tougher and less brittle than solid carbide, often as cost-effective alternative to solid carbide Superior wear life in materials less than 30 HRc and highly abrasive materials like high-silicon aluminum	High-performance application in which carbide end mill can run faster and withstand higher temperatures while providing good wear resistance Carbide is more brittle than HSS and cobalt and best suited in stable rigidity setup to avoid chipping

Drill Point Angle


118	130	135 Split Point	140
General purpose point angle for mild steel and soft metal, plastics, and wood	Common on HSS parabolic drills. Disperse heat well and help keep the drill straight in deeper holes	Common on heavy-duty drills for metals such as stainless steel, split point prevents walking when starting a new hole	Common on high-performance carbide drills, a more aggressive point angle can penetrate tough materials quickly

Coating


Black Oxided	Bright Finished	TiN (Titanium Nitride)	AlTiN	Amorphous Diamond	CVD Diamond
Retains lubricants to help in wear resistance Not recommended in non-ferrous materials such as aluminum	Polished with no coating which helps to increase chip flow in soft materials Recommended in aluminum, plastics, and wood	General purpose coating Better hardness and heat resistance allow drills to run at a higher speed and feeds than uncoated drills	High temperature and abrasive conditions Use in stainless steel, high alloy carbon steels, nickel-based high-temperature alloy, and titanium alloys. Not recommended in non-ferrous materials such as aluminum AlTiN coating increase SFM by 40%	A PVD coating improves lubricity and wear resistance in non-ferrous material Sharp edges improve performance and finish over CVD in certain abrasive, non-ferrous materials (copper, brass, high silicon aluminum) Low temperature threshold unsuitable for ferrous application	Hardness improves abrasion resistance and allows higher feed rates than uncoated carbide Ideal for machining Graphite, Composites, Green Carbide, and Green Ceramic