How to size servo motor equivalent to DC motor?

Hello Experts,

Can any one help me or guide me on how to select/size equivalent AC servo motor to DC 4Q motor?

I am working on project of retrofitting HBM machine having DC 4Q motors for axes motion by CNC system. 

Thanks in advance.

Hello,

Thanks for your reply.

In SIzer or TIA selection tools, I did not found any conversion tool. It simply asks for selection of speed, power, motor from drop down list.

I want to know how to select AC servo motor equivalent to present DC motor.