Radial Teeth / Hirth Coupling

thingiverse

OpenSCAD file to generate any kind of radial teeth similar to a Hirth coupling. Features: generate a whole circle or arc/sector define the tooth size by its average width, arc, or number of teeth further customisation includes tooth depth, inner radius, outer radius and number of slices (detail resolution) Instructions Import the file into your project and call radialTeeth Mandatory paramters tooth_depth - specifies the height of the teeth inner_r - the inner radius outer_r - the outer radius arc - the size of the arc to populate with teeth, 360 being a complete circle Further parameters num_teeth - how many teeth to add for the given arc tooth_a - the size of each tooth in degrees av_tooth_width - the average size of each tooth, given that radial teeth narrow as you move towards the centre this represents the width of the tooth at its midpoint slices - the number of sub-sections which make up an individual tooth; higher numbers give greater accuracy but longer render times Notes whilst not individually mandatory, some combination of num_teeth, arc, tooth_a and av_tooth_width are required to determine tooth size inner_r cannot be zero; a value close to zero can approximate cases where the teeth should extend all the way to the centre Example usage radialTeeth(arc = 360, num_teeth = 20, tooth_depth = 1, inner_r = 5, outer_r = 7); radialTeeth(arc = 45, tooth_a = 5, tooth_depth = 3, inner_r = 10, outer_r = 20); radialTeeth(arc = 160, num_teeth = 4, tooth_depth = 2, inner_r = 0.1, outer_r = 10, slices = 10);