Summary Something got into my laptop fan and broke off all the blades but one. Needless to say, cooling was less than perfect after that. This thing is designed to go over the top of a fan's bladeless hub and thus provide new fan blades. Print Settings Supports: Yes Notes: You'll definitely have to adjust the .scad file to suit your fan's dimensions and rotation. Flip this design upside-down and print with supports. After printing, cut off any existing blades on the old fan and glue on with CA ("super") glue or hot glue. (HINT: if the size is a little too tight, hot glue can help soften the plastic and get it to fit.) Custom Section CAUTION Plastic may soften and deform if used in too hot an area.