This lubricator attaches around a 520 size motorcycle chain to evenly distribute chain lubricant from a spray can onto the chain side. The straw/tube from the spray can chain lubricant is inserted into the hole on the side as shown in the images. Rotate the rear wheel and simultaneously spray lubricant into the lubricator. The lubricant will be directed out the 2 holes inside the device onto the chain's side plates.
Use 3x3mm cylindrical magnets to hold the 2 parts of the lubricator together, or simply use a rubber band as shown.
Use a filament that will withstand the lubricant. I used ABS which works perfectly, PLA probably not a good choice.
The author hasn't provided the model origin yet.