The rated radial shaft runout value for all SM, SE, NeoMetric, J-Series and BE servo motors is specified at 0.003 inch (out of true). For MPM40, MPM66, MPM72 and MPM89 the radial shaft runout value is 0.0015 inch (out of true). Also for MPM114, MPM142 and MPM190 the radial shaft runout value is 0.002 inch (out of true).
If closer radial shaft runout tolerances are required, the Compumotor Servo Motors group can manufacture "built-to-spec" motors as a custom product, depending on the modifications requested. For more information about custom servo motor products inquire with your local distributor or email email@example.com