Create: Stabilized
There is no good way to stabilize a part of a simulated contraption in a simple and compact manner. Unless you are using this mod, as it adds 2 way to do that.
Stabilizer Bearing
Using this bearing, you will be able to stabilize a contraption. Of course if the Stabilizer bearing is placed in the world instead of a simulated contraption, it will just point the attached contraption upwards (or straight forward depending on the placement).
If you use it on a simulated contraption though, the attached contraption will be rotated to point up, no matter the rotation, but only around one axis.
When you rotate the cogwheel of the bearing, it will change the offset angle (if the offset angle is 180°, the attached contraption will point down instead of up)
Create: Stabilized also adds two more options to the regular Swivel Bearing, both of them work similarly to the Stabilizer Bearing, but it requires kinetic rotation to stabilizes, and depends on the rotation speed, so 256 rmp is the max stabilization speed, and 1 rmp is the lowest. Since it's on the Swivel bearing, it is more of an early game alternative