Too small, and the bearing won’t fit at all. If the hole is a little too big, the bearing is loose. If that hole isn’t just the right size, the bearing won’t be held snugly. Imagine one wishes to press-fit a bearing into a hole. Before we explain the solution, let’s first look at the problem a little more closely. Shared a tip about how to get a reliably tight fit between 3D printed parts and other hardware (like bearings, for example.) He suggests using crush ribs, a tried-and-true solution borrowed from the world of injection molding and repurposed with 3D printing in mind.
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