0512-82079033
eisele@eisele-gear.com 
This may seem clear, but since most manufacturers do not have an index for overturning torque, neglecting the moment arm can be very serious if you just look at the force, especially if the moment arm of the axial force is not equal to zero in many applications (the force does not act on the axis).
The radial force is also important, and it is important to note the equivalent moment arm indicated in the sample, because this force cannot be applied at the root of the shaft. When applied to synchronous belts and pinion and rack, the radial force acting on the gearbox shaft is not carefully measured, resulting in the shaft being twisted off at the root, and the customer blames the manufacturer for the material problem. We should know that according to the principle of material mechanics, when a shaft is subjected to alternating axial force and torque at the same time, the stress concentration at the shaft root is far more than that of the torque alone, especially under the action of changing alternating stress, the situation will become very serious.
There are a few other things that are easy to overlook in the application:
A） When the motor with brake is running at high speed, it starts to brake, and the inertia torque of the external load will all be borne by the gearbox. Especially if the load center of mass and the gearbox axis do not coincide, the problem will be more serious.
B） On-board systems, such as radar, antenna, gun carriage, etc., can put a lot of extra force on the gearbox because of vibration and centrifugal force when the carrier is driving on rough roads and turning quickly.
C） Even during installation, especially for gearboxes with flanged output, excessive torque during tightening of the setting screws can cause damage.
Therefore, the shaft output planetary reducer is usually not suitable for direct pinion and rack drive, this kind of mechanism, the best use of flange output planetary reducer.
