One gear has the movement supplied to it by the turn of its shaft and is known as the drive. Interlocked teeth pressure the corresponding gear to turn in a ratio. If the drive turns a larger gear then ...

But the worst part is you could be a teeth grinder and not even know it. Every time a grinder gnashes their back molars together, they exert as much as 200 pounds of pressure per square inch.

Because tooth-to-tooth pressure can be very high, even a small amount of sliding consumes power, turning it into heat. Oil ...