This 74-in-diameter blower had an overhung rotor design of titanium construction. operating at 50 pounds per square inch gauge in a critical chemical plant process. The shaft was supported by oil-film bearings and was directdriven by a 3000-hp electric motor through a metal disk type of coupling. The operating speed was 1780 rpm. https://cosmeticssquadets.shop/product-category/electric-massagers/