Chair Feet

Sturdy feet for chairs etc made of steel tubes. Printed with 0.4mm nozzle and 0.2mm layer height. This particular model is for steel tubes with 22mm diameter so I set the inner diameter of the foot to 0.2mm less to get a tight fit which does not slip on the steel bar. 

I attached a parameterized freecad FCStd file which contains the spreadsheet feature of freecad so you can adjust multiple parameters of the design, especially its inner diameter to adapt to your furniture.