This mod library adds the basics of a mechanical power system. Originally this code sat unused in Embers source code but I've extracted it and made it run on its own with a few extensions.

Current Features

Iron Axles (Reference Implementation)
Gearboxes, as designed for use in Embers. Gears must be inserted into these on all faces where axles should connect. Power output is input divided by number of connected outputs.
Iron Gears (Reference Implementation) (Supports oredicted iron gears)
Creative Source for testing
Gears can have different behaviors for power transfer implemented. Should be flexible enough to produce interesting transfer mechanics.
Redstone control
Merger Gearboxes
Gearbox and axle reorientation
Lubricant API