The motor rotor inertia values are listed in the motor section of the catalog.

Please note there are two values lised for each motor size, with and without brake.
The heavy flywheel is a cast iron high inertia fan available as an option with the NORD motors. It is used to soften the shock at start and stop. If you have no heavy flywheel set this option to 0
Load moment of inertia reflected to the motor shaft.
To calculate this value pick:
   "Linear moving body INERTIA reflect to input" or
   "Reflected INERTIA from output to input"
Load torque at the motor shaft or gearbox input shaft.
The motor speed under full-load condition.
( Full-load means listed nominal power )

For values see the motor section of the catalog.
The overall efficiency consists of the driving unit ( the gearbox ) and the driven unit efficiency ( such as the chain or belt stage efficiency etc.

see "Overall efficiency" calculation.
Acceleration Torque at Input
Variables   Units
JM Motor rotor inertia lb-ft2
JZ Heavy flywheel lb-ft2
JX Load inertia lb-ft2
TX Reflected load torque to input lb-in
nM Motor full load speed rpm
ta Required run up time sec
ηT Overall efficiency %
Tup Acceleration torque required at input lb-in