BBQ hand blower fan

Hand blower fan with planetary gearbox.

BOM

• a piece of 8mm threaded rod length 35mm - to attach impeller to sun gear
• m5x16mm 3pcs - to attach planet gears
• m5x20mm 2pcs - to assemble handle
• m3x30mm 3 pcs - to assembly housing
• m3x10mm'ish 3pcs - to attach gearbox to housing
• 608 bearing

Two versions available: single planetary gearbox or dual stacked planetary gearbox (latter not tested).

Note: This is supposed to be used with steel pipe as nozzle. This is why there is an adapter. It should be customized for the tube diameter. However i never did that.

Source: link.