Radiator Knob Cap

thingiverse

I scoured online for round caps to fit snugly atop my exposed pointy radiator knobs, but all I found were angular ones that lacked visual appeal. Deciding to take matters into my own hands, I set out to create them myself. The design is sleek and straightforward, requiring only a rubber washer to secure the cap in place (see post-printing details for specifics). Since I don't have access to a printer yet, I enlisted the help of Crash from 3D Hubs (https://www.3dhubs.com/service/kresimir), who kindly offered to print the caps on his Ultimaker. Following his expert advice, we chose Colorfabb Copolyester HT (http://ht.colorfabb.com/) to ensure the caps could withstand the high temperatures of my radiators. Print Settings: Printer Brand: Ultimaker Printer: Ultimaker Original Rafts: No Supports: No Resolution: 100 Infill: None (hollow) Notes: (1) Given that the caps sit atop hot radiator knobs, they were printed with Colorfabb Copolyester HT for superior thermal stability and durability. Make sure to use a filament that can withstand your radiator's maximum temperature! (2) The print was done without infill & 2.4mm shell thickness. Post-Printing: After printing the cap, I inserted a thick rubber washer (20mm Outer Diameter, 6mm Hole Diameter, 4-6mm Thickness), and then pushed the cap onto the radiator knob. If you use a washer of these dimensions, there's no need for glue. How I Designed This: For the initial design, I used Google SketchUp, scaling up the dimensions by x100.