1" / 25mm Hose Adapter for 75mm and 97mm blower fans

thingiverse

I designed this specifically for 75mm x 30mm blower fans with a 40mm x 30mm outlet and 97mm x 33mm blowers with a 57mm x 33mm outlet. Both versions are intended to fit into hoses with a 1" or 25mm ID diameter. The mounting holes are threaded for M4 screws. This part can be printed either with the large flat face facing down or with the inlet face facing down. Choose your orientation based on your printer's capabilities and the direction of stresses you expect the part to experience most. Printing with the large face down will test your bridging abilities, while the broad upward slope of the inlet may present a challenge. I was able to print both orientations without requiring any supports.