Foreword
Cooperating organizations
Specification
1 Scope
2 References
3 Terminology
4 Gear hobs for fine pitch gears, metric module
4.1 Amplification of scope
4.2 Tooth form
4.3 Dimensions
4.4 Bore and arbor
4.5 Bosses
4.6 Gashes
4.7 Keys and keyways
4.8 Tenon drive
4.9 Marking
4.10 Ordering instructions
5 Rotary form-relieved gear cutters for fine pitch
      gears
5.1 Amplification of scope
5.2 Terminology
5.3 Tooth form
5.4 Cutter groups
5.5 Dimensions
5.6 Tolerances
5.7 Circumferential form relief
5.8 Arbor tolerances
5.9 Marking
5.10 Ordering instructions
6 Pinion type cutters for fine pitch gears: 0.07 to
      1 metric module
6.1 Amplification of scope
6.2 Tooth form
6.3 Dimensions
6.4 Bore
6.5 Provision of datum cylinders
6.6 Tolerances
6.7 Marking
6.8 Ordering instructions
Appendix
A Incorrect gear action (pinion type cutters)
Tables
1 Dimensions of gear hobs for fine pitch gears for
      preferred metric modules
2 Dimensions of keyway in hob
3 Tolerances for parallel arbor diameters and
      dimensions of key in arbor
4 Tolerance on hob bore
5 Dimensions of tenon drive
6 Accuracy requirements for hobs
7 General dimensions of rotary form-relieved cutters
8 Unit module dimensions of cutter profiles for
      involute teeth to figures 1 and 2 of BS 4582 :
      Part 1 : 1970
9 Tolerances for rotary form-relieved cutters
10 Disc type gear cutter dimensions
11 Extended hub gear cutter dimensions
12 Screwed hubgear cutter dimensions
13 Parallel shank gear cutter dimensions
14 Taper shank gear cutter dimensions
15 Dimensions of bore of pinion type cutters
16 Accuracy tests for pinion type cutters
Figures
1 Hob terms
2 Basic gear rack profiles
3 Gear hob with axial keyway
4 Keyway in hob
5 Key for arbor
6 Tenon drive
7 Terminology of rotary form-relieved gear cutter
8 Dimensions of cutter elements
9 Cutter terms
10 Disc gear cutter
11 Extended hub gear cutter
12 Screwed hub gear cutter
13 Parallel shank gear cutter
14 Taper shank gear cutter