Daisy Wheel for 4 inch Air Duct

thingiverse

I'm utilizing a 4-inch daisy wheel to convert a 4-inch duct stopper into a controllable vent. Initially, I encountered difficulties regulating the exhaust fan speed on my K40 laser cutter, prompting me to create this device. By integrating the daisy wheel with a T-adapter, I've established a controlled "leak" that exhausts air from the room, thereby reducing pressure in the laser cutter. This unit is designed for use with an M8 bolt at its center.