Shaft Angle - Gear Nomenclature
The angle between the two axes of a pair of gears is called the shaft angle.
The typical shaft angle of bevel gears, which are intersecting axes gears, is 90° (right angle), but some bevel gears do not have a 90° shaft angle, these gears are called angular bevel gears.
Miter gears with a shaft angle of 45°, 60°, or 120° are called angular miter gears.
Shaft Angle