Simple and easy to print dust caps for 6mm diameter grease nipples used on many cars, motorcycles and machines.
While greasing the wheel bearings of my car, i noticed that one of the rubber dust caps on the grease nipples was lost. I browsed Thingiverse and couldn't find a single design for those dust caps.
I desingned them in Autodesc 123D. They are designed to be printed with flexible Filament such as TPU. They will print in only 4 Minutes without the need of any support structure. (Theres a 'fillet' on the inside that allows to print the overhang of the 'roof' when printed with the hole on the bottom side)
Used flexible filament at 210°c and a print speed of only 30mm/s took appr. 4 minutes to print. No need to turn it, just print as it is.