2A001

Ball bearings and solid roller bearings, having all tolerances specified by the manufacturer in accordance with ISO 492 Tolerance Class 4 or Class 2 (or national equivalents), or better, and having both ‘rings’ and ‘rolling elements’, made from monel or beryllium;

Not used;

Active magnetic bearing systems using any of the following, and specially designed components therefor:

Materials with flux densities of 2,0 T or greater and yield strengths greater than 414 MPa;

All-electromagnetic 3D homopolar bias designs for actuators; or

High temperature (450 K (177 °C) and above) position sensors.