Tutorial how to make engine part 4

Crank connection points
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Step 1:
open a sketch on the top plane and draw shown sketch
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Step 2:
use revolve command
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Step 3:
open a sketch on top planen again and draw an axis for revolve command
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Step 4:
draw shown sketch
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Step 5:
use revolve command
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Step 6:
thats is all for now