Beveled Gear Bearing
by NateTG, published
In theory, beveling the gears should make a better thrust bearing, more vulnerable to tension.
Now with a set of spiral bevel gears. Will see about printing and assembling the new design.
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Greg's library doesn't seem too good for spiral bevel gears. I've almost got my own working. (Partial STLs are uploaded.)
I took the coordinates in the mesh file converted them from cartesian to cylindrical, and then plugged the result into spherical to cartesian conversion.
The transformation won't preserve circumference ratios, so it doesn't convert cylindrical gears to bevel gears in the way that I thought. Although the STL render might look nice at first glance, the distortion on the gears is pretty visible. It *might* be possible to use the transform on a gear-by-gear basis using some better sophistication.
A more generic version of the matrix transform would allow that sort of thing to be done, but that would also allow ways to break manifolds, and I'm not sure how useful it is.
I saw the feature request you made:
It seems to me that the natural way to generate bevel gears is to do extrusion with spherical layers, which currently also isn't supported in OpenSCAD.
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The stupid work-in-progress flag keeps resetting itself to off -- thanks thingiverse.
I printed a working centimeter scale prototype. Two copies of topbot2 and three or more of roller2. Under heavy axial loads it does pretty well.
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