1. Drill Bits Drill America Tool School www.DrillAmerica.net

2. Features of a Drill Bit Drill Bits are categorized by: • Diameter (Size) • Flute Length • Overall Length • Point Type/Angle • Shank Type and Size • Material A drill bits categorization and functionality is dependent on these features. To view these products in action check out our product videos! www.drillamerica.net/videos

3. Size, Length and Shank Shank Diameter (Size) Flute Length (Cutting Length) Overall Length To view these products in action check out our product videos! www.drillamerica.net/videos

4. Deeper Look - Overall Length • Jobber Length (Standard Length) • 118° Conventional Point and 135° Split Point • Mechanics Length (Short) • Short Black and Gold Drill with 3-Flat Shank • 135° Split Point • Stub or Screw Machine • Shortest Drill Bit • 135° Split Point • Aircraft Extension Drill • 6” or 12” long drill bit with jobber length flute • 135° Split Point • Taper Length Drill • Long drill bit with long flute length • 118° Conventional Point • Extra Length (Long Boy) • Long drill bit with long flute length • 118° Conventional Point • Available in 8”, 12”, 18” or 24” To view these products in action check out our product videos! www.drillamerica.net/videos

5. Deeper Look - Point/Angle Drill Bit Point Type/Angle: • The two most common point types are: • 118° Conventional Point • 135° Split Point • Conventional Point means the drill bit has a 118° point. • It is the tip for most standard drill bits • Split Point means the drill bit has a 135° point. • Split point angle is self centering and prevents the drill from walking during use • Also called heavy duty drill bits 118° Conventional Point 135° Split Point

6. Deeper Look - Shank Drill Bit Shank • Describes the end of the bit that is held in the drill chuck. • Many types, the most common are: • Round (seen to the right) • 3-Flat Shank • Taper Shank • ¼”-28 Threaded Shank • SDS Plus Shank • Some drill bits may have a reduced shank enabling greater size flexibility. Certain diameters available in ¼”, ⅜” ½” and ¾” To view these products in action check out our product videos! www.drillamerica.net/videos

7. Deeper Look - Shank (Continued) Round Shank -Most common 3-Flat Shank -Tighter Hold in Drill Chuck Reduced Shank -Can be round or 3-Flat Taper Shank -For larger drills, use on special machinery only Threaded Shank -Used in Aircraft SDS Plus Shank -Used in Masonry

8. Deeper Look - Material Drill Bit Material • The most common materials are: • High Speed Steel • General purpose drill bit. Most popular material. • Cobalt • Extra hard for stainless steel • 135° Split Point • Solid Carbide and Carbide Tipped • For non ferrous materials • Masonry (Carbide Tipped) • For brick, concrete and other masonry work. High Speed Steel Cobalt Solid Carbide Carbide Tipped Masonry

9. FAQ’s • What drill bits do you recommend • KFD Drills (Killer Force Drills) are premium grade high speed steel with a 135 degree split point tip. They are our best sellers. • What is your most economical drill bit? • DWDN drill bits are general purpose, high speed steel with a black oxide finish. • What do I need for drilling stainless steel? • DWDCO cobalt drill bits (D/ACO for domestic). • Do you have large diameter drill bits? • For any drill bit over ½” we recommend DWDRSD series reduced shank drill bit with a ½” shank. • Do you have long drill bits? • The DWDDL series has extra long drill bits with long flute lengths from 8” - 24” long. • DWDA/C Aircraft Extension Drills are 6” and 12” long with jobber length flute. • Do you have drill sets? • Absolutely. Please check catalog for the selection. • Do you offer drills for glass and tile? • DWDGD series have a tungsten carbide spear point. Suitable for glass, mirrors and very hard ceramic tile. • Do you have drill bits for concrete and brick? • DAM series are standard round shank masonry drills and SDS series are SDS Plus masonry drill bits. • What about wood drills? • We have a few pages dedicated to wood drill bits (spade, brad point, forstner etc..) in our catalog.