Box Fan Lever (Knob Replacement)

thingiverse

The fan knob is well-known to anyone familiar with its function. This component fits onto a 6.5 mm shaft featuring two flat sides that are precisely 5.5 mm apart. Due to the snug fit, printing at a scale of 105% or slightly larger is recommended. A minor (2 degree) draft on the inner diameter of this component ensures it remains securely attached even if your stem has worn down slightly. The lever-style design simplifies operation: instead of struggling with a round knob between two fingers, you can easily control this lever using just your thumb. You can smoothly transition from off to low in a single motion without any hassle. Enjoy the increased mechanical advantage you've earned through this convenient feature.