Picking the right motor for the right application

[VintageMA]

So basically is your thinking that the 1950/7 would be little hot because the RPM/v is higher than that of the 1950/9 or 10? In that the 7 may try to draw more Amps in order to make it up to the spec speed at any given input voltage - thus causing the motor to heat up more quickly than the 9 or 10 turn motor?

Thanks for the input - but I think my point was mainly that there is some guesstimation that comes into play here and the accuracy level in picking the best motor only comes with experience