The design of bevel gear stages, with or without axial offset, begins with the determination 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),
- 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),
- The face width factor cbe2 must be calculated as the design point is not in the center of the tooth as required.
- Used by Gleason
- Method 2 for hypoid gears (Oerlikon):
- Calculation of hypoid gears,
- Continous indexing only (tooth trace curve: epicycloid, tooth depth: constant),
- 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),
- Face width factor: cbe2 = 0.5,
- Usually used by Klingelnberg