how do i select a motor for heavy duty application

[kausreloaded]

does ni offer motors for heavy duty application

[A_Person]

That would really depend on your definition of heavy duty. The data sheets for the motors NI does sell can be found at http://sine.ni.com/ds/app/doc/p/id/ds-311/lang/en and http://sine.ni.com/ds/app/doc/p/id/ds-280/lang/en. Generally, torque and speed are the first requirements you will want to look at to know whether or not these will suffice and whether you'll want to go with stepper or servo motors.

For future reference, there's a subforum dedicated to motion control questions at http://sine.ni.com/ds/app/doc/p/id/ds-280/lang/en. You might find additional information there.