Clutch[]
The clutch is basically a gated shaft - when powered by redstone, it transmits its input torque and speed unchanged. Remove the redstone source from it, and it outputs nothing.
Crafting Recipe[]
A Clutch is made with a Shaft Unit, a Mount, and Redstone in a vertical line.
A Clutch can also be made with a Steel Shaft over some Redstone.
Functions[]
Clutches add in a simple disconnect to any line.
Want to stop the grinding of Canola because your Reservoir is full? If you have a clutch inline with the Grinder and you flip a lever, the grinder turns off.
How about extending and retracting your Light Bridge ? Same thing, as long as the clutch is in the power line to the Light Bridge you can activate or deactivate it at will.