The model 3133 TurboTorr Turbomolecular Vacuum Pump is a vertically mounted, oil-lubricated turbo which uses a patented blade design.  It incorporates a patented journal upper bearing which makes no metallic contact with the rotating shaft.  The lubrication system creates an oil film (which acts as a bearing surface) between the moving rotor shaft and the stationary upper journal bearing, thus eliminating the need for a ball bearing at this location.  This journal bearing has no inherent life limitation and, because there are no moving parts, the vibration levels of this pump are significantly lower than those of the traditional two ball bearing design.  Oil lubrication is supplied by an external oil pump (not included).

Pumping Speed for N2: 1150 liters/second
Ultimate Pressure: 1 x 10^-9 Torr / 1.3 x 10^-9 mbar
Displacement Vibration: <0.03 µm
Mounting Position: Vertical:, +/- 5  degrees
Inlet Flange: ASA, 11 inch OD
Outlet Flange: ISO NW 40
Rotational Speed: 50,000 rpm
Acceleration Time: 6 minutes
Spin Down Time: 30 minutes
Pump Body: Aluminum