Again a openscad full parametric object. This part's primary use is, house a ball bearing and screw it to some where :-) I didn't printed yet, but soon I will do a update after I printed out. The value for the "bearingInnerDiameter" parameter is not the shaft diameter. It's purpose is to keep a space for the inner rotating ring, to prevent friction with the top housing cover. Don't forget to do a "compile and render" before stl export! It's not foolproof, but you can change allot of parameters. Following are all parameters you can change for you need. // bearing parameters bearingOuterDiameter = 18.2; bearingHeight = 5; bearingInnerDiameter = 9.5; // housing parameters housingTopBevelHeight = 1.5; housingWallThickness = 2.5; // mounting parameters mountingPlateCount = 3; mountingPlateHeight = 2.5; mountingScrewDiameter = 3.2; mountingScrewBaseOffset = 2; mountingScrewToHousingPadding = 2.5; // option flags debugMode = false; // do a cut out for debuging supportStructures = true; // requiered for reprap type printers