2014-02-20 10.24.05

Belt Hubs are a good way to transport power without loss over great distances.

This will save a lot of steel but in exchange will cost quite a bit of leather. Two belt hubs are required for power transfer in one direction.

Rotarycraft Handbook DescriptionEdit

"The belt hub can be used to transport power cheaply over a large distance. Simply place two hubs such that they are able to connect (clear line of sight and in-plane connection). To connect belts, right-click one with a stack of belts, then right-click the other with the same stack. For each meter traveled, you need one additional belt item (up to a maximum of 64 blocks). The belt can only transmit so much power without slipping; it can only carry, at maximum, 8192 Nm of torque at 8192 rad/s before losses become apparent, and less when wet. Belts can only be connected if one is in output mode."


The hubs have to be parallel to each other and on one axis. They also have to be oriented appropriately so the belts can connect.

To connect 2 hubs, one has to be in output mode and the other in input mode. Note that to avoid losing power, the input torque and speed have to be adjusted with gearboxes to be less than the limits the belt hubs can carry.


Max Torque 8192 Nm
Max Speed (without transfer loss) 8192 rad/s

Angular Transducer OutputEdit

Screwdriver UsageEdit

Right Click Adjust orientation
Shift + Right Click Switch input/output modes

Tips & TricksEdit

  • To switch direction, an additional set of hubs is required, with bevel gears between.
  • For power in excess of 67 MW, or for use where it may rain on the belts, considering using the Chain Drive.