In a vacuum, three quiet failures destroy ordinary motors. Outgassing: plastics, varnishes and adhesives release vapors that contaminate chambers and optical surfaces — so we specify low-outgassing materials throughout, with thermal-vacuum degassing of components. Lubrication: standard greases evaporate or turn to wax, which is why vacuum motors use specialized lubricants or dry bearings. Heat: with no air convection, every watt of loss must travel through the mounting surface — thermal paths are designed into the housing and flange.
Our vacuum grades cover 10⁻¹ / 10⁻³ / 10⁻⁵ Pa as standard (VTL / VMT / VHT), with 10⁻⁷ Pa customization, and every design is validated in our own thermal-vacuum characteristic test chamber.