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So, I've been wondering about the basic differences between CNC-milled and 3D-printed gears. It seems like CNC would generally offer superior strength and tighter tolerances,especially when working with metals like aluminum or steel. You coudl get really precise involute profiles and surface finishes that a 3D printer might struggle to match, crucial for high-load applications.
However,3D printing seems much better for complex geometries or one-off prototypes. Imagine trying to CNC mill an internal gear with a really intricate tooth pattern – it'd be a nightmare! 3D printing opens up possibilities for integrated features and geometries that subtractive methods just can't achieve, plus you can iterate designs much faster.
I guess it really boils down to submission. High-performance machinery probably needs the robustness of a CNC gear, while a hobbyist project or something requiring a unique design could be perfectly suited for a 3D-printed one using filament like PETG or even some of the more advanced composite materials. Curious what everyone’s experience has been. What factors do you consider when deciding which process to use?