Ford #4(ish) Viscosity Cup

thingiverse

When I discovered the price of these online, I knew instantly I wasn't going to be purchasing one. It's a viscosity cup, essentially a de facto and ubiquitous "Ford #4". I found the dimensions online somewhere. USAGE: Hold the handle with the cup hanging below it. Fully submerge the cup into the liquid being tested. Raise the cup out of the liquid, starting the stopwatch at exactly the same moment. Observe the liquid draining and stop the stopwatch when the flow breaks off for the first time, usually watching about an inch below the outlet nozzle. Note the time on the stopwatch. Is the time just right? Goldie Locks would be pleased! Too long? Add a thinner. Too short? Remove the thinner (hmmm!). Now it's back to dunking and timing. You're ready to "do whatever". I use this for spray paint viscosity, at around 20 seconds. Fusion 360 design is shared at this A360 link. And, just in case it needs saying... Do not try to use this in liquids that react with what you fabricate it from! I only use it for waterborne paints.