22 in the closed end 27 of the housing 26 the journal bearing 34 is a large area static bearing having low force loadings and serving as the base surface for a hydrodynamic bearing effect when the well accepted minimal conditions of pressure viscosity and rotational rate are maintained it is assumed that operation of the motor 20 will be essentially continuous even though the motor may be stopped after extended intervals e g a few hundred hours to enable servicing of an associated tool in a semiconductor fabrication facility service of the pump motor combination itself is not contemplated because its design provides extremely long life estimated in the range of 10 years for the use indicated when more frequent stops and starts are to be expected or other conditions of intermittent operation might be encountered the journal bearings typically of metal can be of carbon or incorporate carbon inserts the second extended end 24 of the central shaft 22 is supported by a second large area journal bearing 38 that is adjacent the open end 28 of the magnetic housing and positioned in an associated pump mount 40 a single journal bearing can be used if adequate in area to support the rotor mass within the length requirements of the system the pump mount 40 also provides the physical intercoupling between.