Drawing an Involute Spur Gear from Scratch in Fusion 360

In this video I show how to draw a Spur Gear from scratch in Fusion 360. Instead of approximating the involute curve of the gear tooth, we calculate it using a spreadsheet (see the link above) and import the curve to our model for an accurate representation of the gear teeth.

Although I used Fusion 360 for this example, the technique used can be easily translated into any CAD software using this method.

#fusion360 #CAD #maker #spurgear

[JJSijbesma]

This was a great help to me. I'm currently attempting to design metric gears using codeblocks in tinkercad and as such needed to know exactly how the shape of a tooth is defined.
This combined with some videos on the maths you implemented in your spreadsheet and a document on the standards of metric gears was just what I needed for my little project.

[Highbrow]

Subscribed instantly when I heard "Hello Everyone, Dustin here"

[trailranger]

That was cool. Imagine my disappointment when I realized you have only 3 videos. You seem like someone I could learn a helluva lot from.

[davidewing]

Thank you. I had been looking for just this specific design tool.

[RELUvance]

This is my first video so please let me know if you found this helpful or if there was anything I can do better! What other types of topics would you like to see covered here?

[turnswood]

Hey Dustin...more videos, please. I watched your planetary gears and the spur gear add-in which I knew nothing about and now this to see how a gear is really made with all the correct geometry. I started following along with you and stopped when you got to the Excel piece. I will download that later and watch the rest of it. Thanks a lot. Irv in Florida

[vijayanselvaraj]

This video is very useful for me. Thank you

[ezequielleonzybert]

Is this gear parametric? Can I modify it by changing the variables? There was a constant on the tooth design and also the profile is being imported as a constant.

[wakizashi]

add more significant digits past the decimal point in the csv to get more resolution for the teeth spline. 2 is not enough for some cases

[Parken]

1. How do you select the point of intersection of the Circular Pitch (CP) in order to retrieve the correction factor 11:40 it seems your cursor autoselects a point, mine is simply guesswork...
2. How do you manage to pick the points where the spline intersects the addendum 12:20 for creating the tooth tip and the lower end?
3. How do you select the spline for the mirror operation?

Thank you, anyone who responds.

[mbhoward]

Very nice tutorial. Thank you for using Fusion 360. I was an Inventor user and miss the gear accelerator functionality. I am interested in gearing from a supercharger drive standpoint, both automotive and aircraft engine.

[joejones]

I know this is way behind the timeline. I see when you imported the .csv file it created a sketch under a Sketch item. Then it magically appeared in the SpurGear: object's sketches. Not sure how you got it there. NewBee.

[davidewing]

How do you draw the profile for an internal gear of a ring gear that would mate with the spur gear?

[RaahNeko]

Thank you for your video. I need to make "shifted profile gear" (I believe there are no script or tools for this for free) and your video is very helpful!

[nathanael_opoulos]

When I attempt to import the CSV file for the involute curve all I'm getting is a straight line that doesn't quite reach the Addendum Diameter.

[robguyatt]

Sorry to be a pedant but the term is module. That said, good vid. :)

[steelstone]

Nice job !
The angle you measure at 11:50 only depends on the pressure angle 20°. It is a constant regardless number of teeth or module. Its value is (TAN(PI/9) - PI/9) rad (so about 0, 854° as you report), knowing that (PI/9) rad = 20°.

[satchelsieniewicz]

your circular pattern should not use bodies... you should use faces instead

[rjw]

you go too fast for newbies, slow it down a bit>