Optionalwidth: numberOptionalbore: numberOptionalhub: numberOptionalhubLength: numberOptionalkeyway: booleanOptionalmodule: numberOptionalteeth: numberOptionalpressureAngle: numberOptionalprofileShift: numberOptionalbacklash: numberOptionaladdendum: numberOptionaldedendum: numberOptionalrootFillet: numberOptionalrotation: numberOptionalframe: Bit.Inputs.Base.FrameOptionalunit: unitOfLengthEnumOptionalkeyStandard: keyStandardEnumOptionalmoduleThe size of the teeth: the pitch circle's diameter divided by the number of teeth, in model units. Gears mesh only with gears of the same module.
OptionalteethHow many teeth the gear has, at least 3.
OptionalpressureThe angle at which meshing teeth push on each other, in degrees; 20 is the common standard, and meshing gears share it.
OptionalprofileHow far the teeth are moved out from the pitch circle, as a share of the module. Positive values give thicker teeth that small gears need, negative values thinner ones.
OptionalbacklashHow much thinner each tooth is at the pitch circle than a tight fit, in model units; two meshing gears leave the sum of their backlash between their teeth.
OptionaladdendumHow far the teeth reach above the pitch circle, as a share of the module.
OptionaldedendumHow deep the gaps reach below the pitch circle, as a share of the module; more than addendum
leaves room for the tips of the mating gear.
OptionalrootThe radius that rounds the bottom of each gap, as a share of the module. It shrinks to fit a narrow gap, and 0 leaves a sharp corner.
OptionalrotationHow far the gear is turned about its centre, in degrees. At 0 a tooth points along the frame's direction.
OptionalframeThe frame the gear lies in: its centre at the origin, a tooth along the direction, its face toward the normal. Left out, the ground, facing +Y.
OptionalwidthHow thick the gear is along the frame's normal, in model units.
OptionalboreThe diameter of the hole through the middle of the gear, in model units; 0 leaves the gear whole. It must stay inside the root circle.
OptionalhubThe diameter of a hub standing out from the gear's end face, in model units, between the bore and the root circle; 0 leaves no hub.
OptionalhubHow far the hub stands out beyond the gear's end face along the normal, in model units.
OptionalkeywayWhen true, a keyway is cut along the bore, sized by keyStandard for a shaft of the bore's
diameter in unit, toward the tooth at rotation 0.
OptionalunitThe unit the gear's numbers are in, which sizes its keyway from the key standard's table; the teeth themselves take any unit.
OptionalkeyThe standard the keyway is sized by: DIN 6885 or the inch ANSI B17.1.
The teeth and the frame of a spur gear for
parts.mechanical.gears.spurGearand its twin with face roles, with how thick the gear is and the hole through its middle.