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

I made this for 75mm x 30mm blower fans with a 40mm x 30mm outlet and 97mm x 33 blower fans with 57mm x 33mm outlet.

Both versions meant to go into hoses 1" or 25mm ID. The mounting holes are meant for M4 screws.

It is printable with the large flat face down or with the inlet face down. Choose your orientation based on your printer's ability and the direction of stresses you expect the part to experience most. Large face down will stress your bridging ability, the broad upward slope of the inlet might be a challenge. I did not need supports for either orientation.