# Thread: How to 2D Draw A Tooth of Gear?

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Delete the first yellow circle and trim the second yellow circle as shown below.
Trim Big_R.PNG

Repeat this process with the cyan (little_r) arc as shown earlier in post #11.
Attach the file here.

2. Radial line.jpgDraw line (shown green) from then end of the cyan arc to the center of the gear.

3. Add green Root Fillet as shown.

Root Fillet.jpg

4. Rotate the vertical line -7.5° as shown.
I think you can figure out the rest.
(Join, Mirror, Trim, Array)
there are 12 teeth in this design.
Post back solution or further questions and I will attach the xls (can be set to any number over 12 teeth).

Bisect angle.PNGTooth.PNG

5. Originally Posted by JD Mather
Delete the first yellow circle and trim the second yellow circle as shown below.
Attachment 39402

Repeat this process with the cyan (little_r) arc as shown earlier in post #11.
Attach the file here.
The yellow circle shown on above is not similar with the yellow circle you shown on the #13.

I can't continue because of this.

6. Sorry, I think I skip the #20.

Now I can continue.

7. Another problem, I don't know how to make the cyan arc in #11.

I can not continue.

8. make the cyan arc exactly like the yellow arc was made, but with a radius of .109167 (little_r)
draw the circle with the center at the intersection of the red lines - just like the first yellow circle was drawn.
draw second cyan circle where it intersects the red circle - just like was done with the second yellow circle.
delete the first cyan circle
trim the second cyan cirle
If you still can't figure it out post back and I'll do step-by-step pictures

9. Originally Posted by JD Mather
make the cyan arc exactly like the yellow arc was made, but with a radius of .109167 (little_r)
draw the circle with the center at the intersection of the red lines - just like the first yellow circle was drawn.
draw second cyan circle where it intersects the red circle - just like was done with the second yellow circle.
delete the first cyan circle
trim the second cyan cirle
If you still can't figure it out post back and I'll do step-by-step pictures
Unlike the yellow circle/arc, the problem is I can not find the center of the cyan circle.

The center of the yellow circle is known at the quadrant on the top of the white circle (D1.0000).

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Meanwhile, come take a look at my current work.

I don't know whether it's correct or not.

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