Spur Gear

The Spur Gear group generates a simple spur gear.

See the section on Spur Gear Geometry in the Working Notes for more detail on the math used to generate this node group.

Inputs

Module: The module for this gear.
Teeth: The number of teeth on the gear.
Pressure Angle: The pressure angle in degrees.
Depth: The thickness of the gear.
Hole Radius: The size of the center hole. This may be zero. The upper bound is constrained so the hole can’t be larger than the dedendum.
Half Pitch rotation: All gears are created with a right side cog that straddles the X-axis. Checking this will rotate the gear a half a tooth thickness so that the root straddles the X-axis. This is convenient for meshing gears.
Flank Resolution: This integer value sets the resolution of the sides of the gear cog. The default sets a reasonable default but set this lower if to control vertex count. Any large value may be reduced by distance merging in the implementation.
Z Faces: The number of faces along the depth of the tooth. This can be set to 1 if you are going for a minimal pixel count. Larger values can improve the smoothing.

Outputs

Geometry: The generated gear geometry.
Ref. Pitch Radius: The reference pitch radius of the generated gear. This is useful for setting the distance between two meshed gears.
Teeth: For convenience, the number of teeth on this gear.

Examples

Spur gears are simple gears and this example shows how a basic gear set can be constructed. The default values are used for both gears with the exception of the number of teeth. The second 16-tooth gear is translated by the sum of the reference pitch radii of the two gears. The Half pitch rotation has been checked on the second gear so that it properly aligns with the first gear.