The bearing, to the right, is a two row inner rotor bearing with the shaft placed in the middle as a traditional bearing
Magnetal unique inner rotor bearing is now available for sale to R&D-departments and universities
The dimensions are: ID: 15 mm (0.59"); OD: 42 mm (1.65"); Height: 17 mm (0.67")
The bearing, to the right, has an outer rotor. The image shows the bearing implemented in a flywheel application with built in motor-generator.
The intermediate bearing is made for hollow shafts. This bearing has the best performance of the three solutions.