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| Isometric Bike Cranks and Pedals - page 3 |
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The crank arm measures 1 inch wide by 7.5 inches high. At each end it there is a wider segment that measures 1.375 x 1.75 inches. Begin by creating both of those rectangles. Come close with them because they must be completely rounded. Round the rectangles with the node edit tool (F10). Convert both rectangles to curves. Delete the double nodes at the top and bottom of the rectangles and then add them back in with the plus sign. Delete the extra side nodes. Create a circle 0.50 inches in diameter. Convert the circle to curves (Ctrl+Q). |
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Turn on Snap to Objects and snap the outside of the circle to the top outside of the shorter circle. Select both objects and center them horizontally. Combine both objects (Ctrl+L). Snap the top center of the shorter object to the top of the taller rectangle. Vertically mirror a duplicate and place another at the bottom. |
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For the time being break apart the shorter shapes (Ctrl+K). Select the three rounded rectangles and weld them together using the shaping Docker. Marquee select everything and combine them (Ctrl+L). You now have a primitive for the crank arm. |
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