a gear-driven alternator. There are three basic sources of friction loss in gear drives: Tooth-to-tooth sliding contact: ...

There is too much friction in its gears. The battery life isn't watchlike, lasting only a day. The Gear will work only with Samsung Galaxy devices, and currently just with the new Galaxy Note 3 ...

Worm-gear efficiency tops out at 65 to 80%. Worm gears usually experience sliding friction, which wastes energy, creates heat, and increases tooth wear, all of which shorten the life of a gearbox.

high performance bicycles used friction shifting. To oversimplify this technology, there are no clicks in the shifter, and you just move it until the chain goes into the correct gear, kind of like ...

A gear is nothing more than a clever way to make two circles rotate in concert with each other as if they were perfectly joined at their circumferences. Rather than relying on the friction between ...

Friction is an interaction between objects in ... and Fender's GarageBand Rival—Your Gear News of the Week Plus: Coros has a repair program for its fitness trackers, there's a new The Last ...