The gear’s teeth having one side of each is what rectifies the chaotic agitation of the surrounding water into a one-way spin. Scaled down far enough, these could conceivably act as energy ...

Every vehicle comes with an axle gear ratio number, but not everyone knows why it's important. Here's how to read the ratio ...

The rod can be slowly turned by hand to adjust the workpiece position, to allow the gear teeth to be cut to an appropriate depth. The method of action is simple. As the tap turns it not only cuts ...