Big Rim

grabcad

First, I started by creating a sketch on a mid-point line so I can sketch based off the middle. Next, I sketched 2 even lines that measured 60mm in between them. Then, I started at the top of the 2 lines and sketched 2 lines on either side measuring 105 degrees. Then, I made a line on the left side that's vertical to 30mm. Next, I drew a big line on top of the vertical line to 100mm. Then, I measured out to 20mm on both sides and trimmed the rest of the big line. On to the bottom portion, I created another line on both sides that measured 100mm and created a horizontal line to 140mm to finish the sketch. Next, I revolved the entire sketch to make the design. Finally, I changed the material to 1060 Alloy and measured the mass to be exactly 112862.37 grams.