1 - AS/ NZS 2438.1:1994 DRILLS AND REAMERS - SPECIFICATION FOR TWIST DRILLS
4 - PREFACE
5 - CONTENTS
6 - 1 Scope
6 - 2 References
6 - 2.1 Normative references
6 - 2.2 Informative references
6 - 3 Definitions
6 - 3.1 Types of twist drill
6 - 3.1.1 parallel shank jobber series twist drill
6 - 3.1.2 parallel shank stub series twist drill
6 - 3.1.3 parallel shank long series twist drill
6 - 3.1.4 parallel shank extra long series twist drill
6 - 3.1.5 Morse taper shank twist drill
6 - 3.1.6 Morse taper shank extra long twist drill
6 - 3.2 Other terms
6 - 3.2.1 axis
6 - 3.2.2 back taper (longitudinal clearance)
6 - 3.2.3 body
6 - 3.2.4 body clearance
6 - 3.2.5 body clearance diameter
6 - 3.2.6 chisel edge
6 - 3.2.7 chisel edge angle
7 - 3.2.8 chisel edge corner
7 - 3.2.9 depth of body clearance
7 - 3.2.10 diameter,
7 - 3.2.11 face
7 - 3.2.12 flank
7 - 3.2.13 flutes
7 - 3.2.14 flute length,
7 - 3.2.15 heel
7 - 3.2.16 helix angle
7 - 3.2.17 lands
7 - 3.2.18 land width
7 - 3.2.19 lead of helix
7 - 3.2.20 left-hand cutting drill
7 - 3.2.21 lip (cutting edge)
7 - 3.2.22 lip clearance angle
8 - 3.2.23 lip length
8 - 3.2.24 outer corner
8 - 3.2.25 overall length,
8 - 3.2.26 point
8 - 3.2.27 point angle
8 - 3.2.28 quick helix angle
8 - 3.2.29 rake angle
8 - 3.2.30 relative lip height
8 - 3.2.31 right-hand cutting drill
8 - 3.2.32 shank
8 - 3.2.33 slow helix angle
8 - 3.2.34 web
9 - 3.2.35 web taper
9 - 3.2.36 web thickness
9 - 4 Dimensions
9 - 5 Features of design
9 - 5.1 General
9 - 5.2 Cutting diameter
9 - 5.3 Back taper
9 - 5.4 Parallel shank
9 - 5.5 Taper shank
9 - 5.6 Lengths
9 - 5.7 Web thickness
9 - 5.8 Web centrality
9 - 5.9 Flute divide
11 - 5.10 Land width
11 - 5.11 Point angle
11 - 5.12 Relative lip height
11 - 5.13 Radial runout
12 - 6 Materials and hardness
12 - 6.1 Cutting portion
12 - 6.2 Shank
12 - 7 Marking
13 - 8 Performance
36 - Annex A - Method of Test (normative)
36 - A.1 Test billet