Tutorial: how to model a propelling pencil (3)

part 1
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Step 1:
open a sketch on this surface
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Step 2:
draw shown sketch
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Step 3:
cut the body 0,8mm
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Step 4:
open a sketch on the front plane
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Step 5:
draw shown sketch
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Step 6:
add shown line. we will use trim command so the startpoint and endpoint is not importand
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Step 7:
use trim command like this
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Step 8:
exit from the sketch and go to inset--curve--helix spiral
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Step 9:
draw shown circle. exit from the sketch
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Step 10:
enter shown values
next: http://grabcad.com/questions/tutorial-how-to-model-a-propelling-pencil-4