Big Rim

grabcad

Mass = 112862.37 gramsVolume = 41800876.90 cubic millimetersSurface area = 1789353.33 square millimetersMaterial is 1060 Alloy.I sketched a midpoint line 140mm long, constructed 100mm tall sides and connected the top line to make it a closed profile. Then I aligned another rectangle (width of 60mm by the height of 305mm) with the middle of the bottom rectangle. On top of the new rectangle, I created another one (width of 100mm by the height of 45). Measure 20mm from the top rectangle, left side and from right. Then, connect a line 30mm down on both side. and connect the rest. Measure 75degrees on both side. And going back to the bottom rectangle and the middle one, their inside corners should be 105 degrees as well as the ones between middle and top rectangle. The entire height of the rim is 450. Finally revolve the sketch, it should have a diameter of 900mm.