Anyone who has ever snapped a chain or a crank knows how much torque a bicycle’s power train has to absorb on a daily basis; it’s really more than one might naively expect. For that reason, [Well Done ...

Whether you have a mechanical limited-slip differential (LSD) in your car you stand to benefit from knowing how one works. Not so you can know how to fix it or anything—just because they’re a ...

A giant, high-speed 3D printer is producing large, ultra-strong steel components and weapons for the US Army. It may also have non-military uses. The prototype printer, commissioned from 3D Systems in ...

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Just a few years ago, 3D printers under $500 were simply toys. They weren’t very capable and they wasted more filament than they used correctly. That has changed in recent years, however, and now you ...

Load up the filament, transfer your slices … the best 3D printers under $1000 have all the tools that most makers will need to give form to their visions. You might be a hobbyist separately printing ...

3D printed gearboxes are great for experimental designs, but due to roughness and inaccuracies in the printed surfaces, they can wear quickly and be rather noisy. As a possible alternative, [Resetman] ...