The determination of bevel or hypoid gear geometry begins with the calculation of the pitch cone parameters. ISO 23509 (2016) provides the following four methods, each of which requires specific input data:
- Method 0 for bevel gears:
- Calculation of bevel gears (hypoid offset = 0),
- Continous indexing (tooth trace curve: Epicycloid, tooth depth: Constant) or single-indexing (tooth trace curve: Circular arc, tooth depth: Constant or variable) possible,
- Face width factor: cbe2 = 0.5
- Method 1 for hypoid gears (Gleason):
- Calculation of hypoid gears,
- Continous indexing (tooth trace curve: Epicycloid, tooth depth: Constant) or single-indexing (tooth trace curve: Circular arc, tooth depth: Constant or variable) possible,
- It is necessary to determinate the Face width factor cbe2, because the calculation point is not in the middle of the wheel face width.
- Used by Gleason
- Method 2 for hypoid gears (Oerlikon):
- Calculation of hypoid gears,
- Only continous indexing (tooth trace curve: Epicycloid, tooth depth: Constant) possible,
- Face width factor: cbe2 = 0.5,
- Used by Oerlikon
- Method 3 for hypoid gears (Klingelnberg):
- Calculation of hypoid gears,
- Continous indexing (tooth trace curve: Epicycloid, tooth depth: Constant) or single-indexing (tooth trace curve: Circular arc, tooth depth: Constant or variable) possible,
- Face width factor: cbe2 = 0.5,
- Usually used by Klingelnberg