Grab cad users help me in selecting Motor for simple project.

Thanks for replying-
The main constraint here is the motor is mounted in a casing where the mounting space is less assume 60mm thick means the whole motor setup should be near to 60 mm
Motor to rotate a 1 kg disc which is bearing an axial load of 15kg over it and it has to rotate with the speed of 150RPM to 200RPM. If the motor is rotating at 1200 RPM, not an issue I am planning to step down using gears or pulleys to the Required speed and Torque.

it is a continuous operation for up to 5 mins and stops and again the cycle repeats.

go through the attached file to have a good idea.

Hello!
You must be clear about the demand that your engine will have. From what I understand, it should drive a 1Kg rotating disk (that only implies "inertia" but not resistive torque) and a 15Kg vertical load (which in that direction exerts no true resistive torque if those 15Kg unload properly in a bearing). That is, your engine is simply driving rotating masses and overcoming a small resistant torque due to unavoidable friction.
The dynamics of a motor-machine system is determined by observing the torque-speed curve of the motor compared to that corresponding to the load. If the load "torques" too high, the engine may not even start! If the load does not ask for torque, but has great inertia (as in your case), what happens is that all the motor's torque is used to accelerate the load. In other words, it will reach nominal speed in more or less time, depending on the available motor torque.
From the "technological" point of view there are motors prepared to deliver exceptionally high torques, which have somewhat different geometric proportions (long rotors) and perhaps your space limitations lead you to use a motor of this type (if there is not much diameter for its rotor, you may not be so limited with its length).

If you don't have a better tool to calculate engine starting time, you can adapt the attached spreadsheet (if GC won't let me upload an Excel, I'll change its extension to txt and then you'll have to put *.xlsx back) ).

You need to have the curves of the motor (provided by the manufacturer) and that of your machine (which you can simulate as a horizontal straight line with zero or almost zero height (there is no resistant torque, just inertia).

As usual, the torque and speed axes are taken in the range 0 - 1 (each one divided by its maximum value) although you can set absolute values.

The sheet calculates the difference between both torque curves (engine - machine) to find the THROTTLE COUPLE "C". This acceleration couple, estimated "in jumps" of constant velocity is:

C = J * Acceleration = J * Change Velocity / Time Interval

Where "J" is the EQUIVALENT INERTIA value of your entire rotating system (considers all the rotating masses at the speed at which they rotate, including the motor rotor, and converts them into a single equivalent inertia value as if it were rotating at engine speed).

Then, from that formula, you can solve for the Time Intervals (discrete, in steps) and add them to get an approximation of the system boot time (highlighted in red in cells with yellow background).

Marcelo Valderrey thank you so much for taking time to explain this with Pictures and excel. I understood the what you are trying to convey. I will work on this.
and thank you Bob Wiley for supporting.