ASME Y14.7.2 : 1978

1 Scope
2 Purpose
3 General drawing practice
4 Gear drawing practice
4.1 Dimensioning
4.2 Angular dimensions
4.3 Drawing format
4.4 Drawing title
4.5 Straight bevel gear teeth
4.6 Spiral bevel gear teeth
4.7 Hypoid gear teeth
4.8 Matched sets
5 Gear tooth nomenclature
5.1 Axial plane
5.2 Pitch plane
5.3 Transverse plane
5.4 Normal plane
5.5 Tangent plane
5.6 Mean point
5.7 Tooth trace
5.8 Diametral pitch
5.9 Module (metric)
5.10 Pressure angle
5.11 Spiral angle
5.12 Hand of spiral
5.13 Hypoid pinion offset
5.14 Direction of rotation
5.15 Tooth form
5.15.1 Generated
5.15.2 Non-generated
5.15.3 CONIFLEX (registered trade mark)
5.15.4 REVACYCLE (registered trade mark)
5.15.6 HELIXFORM (registered trade mark)
5.15.7 ZEROL (registered trade mark)
5.16 Depthwise tooth taper
5.17 Clearance
5.18 Backlash
5.18.1 Backlash tolerance
5.18.2 Backlash variation
5.18.3 Backlash variation tolerance
5.19 Circular thickness
5.20 Measuring addendum
5.21 Measuring thickness
5.22 Mean measuring depth
5.23 Runout tolerance
5.24 Pitch tolerance
5.25 Index tolerance
5.26 Composite tolerance
5.27 Tooth surface texture
5.28 AGMA quality class
5.29 V and H check
5.30 Face angle distance
5.31 Back angle distance
Figures
1 Straight bevel gear/pinion
2 Data specifications for straight bevel gears
3 Spiral bevel gear/pinion
4 Data specifications for spiral bevel gears
5 Hypoid pinion
6 Hypoin gear
7 Data specifications for hypoid gears
8 Data specifications for bevel gear matched set
9 Bevel gear nomenclature - axial plane
10 Hypoid gear nomenclature - axial plane
11 Bevel gear nomenclature - transverse plane at
        outside diameter
12 Bevel gear nomenclature - normal plane at the
        mean point
13 Mean spiral angle
14 Pressure angle
15 Hand of spiral and pinion offset

Outlines methods to be followed in specifying drawing data for gears with intersecting axes (bevel gears), and non-parallel, non-intersecting axes (hypoid gears). Provides engineering drawing standards defining the finished product straight bevel, spiral bevel, and hypoid gears.