Abstract (Inputs.OCCT)OptionalmoduleThe size of the teeth: the pitch circle's diameter divided by the number of teeth, in model units. A gear meshes inside the ring only with the same module.
OptionalteethHow many teeth the ring has. Their tips must stay outside the base circle, which takes at least 34 teeth at a pressure angle of 20 degrees.
OptionalpressureThe angle at which meshing teeth push on each other, in degrees; 20 is the common standard, and the ring shares it with the gears inside it.
OptionalbacklashHow much thinner each tooth is at the pitch circle than a tight fit, in model units; the ring and a gear inside it leave both backlashes between their teeth.
OptionaladdendumHow far the teeth reach in from the pitch circle toward the centre, as a share of the module.
OptionaldedendumHow deep the gaps reach out beyond the pitch circle, as a share of the module; more than
addendum leaves room for the tips of the gear inside.
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.
OptionalrimHow thick the ring is outside the bottoms of its gaps, in model units.
OptionalrotationHow far the ring is turned about its centre, in degrees. At 0 a tooth points along the frame's direction.
OptionalframeThe frame the ring lies in: its centre at the origin, a tooth along the direction, its face toward the normal. Left out, the ground, facing +Y.
The teeth of an involute ring gear, cut on the inside of a ring, shared by
parts.mechanical.gears.ringGearProfileandparts.mechanical.gears.ringGear: their size, their shape, how loosely they fit, how thick the ring is outside them and where the ring lies.