Creating Gear from Rack Profile

[richardsmith55WQ5]

What is the quickest way to create a gear (pinion or wheel) from a rack tooth profile sketch? I need to create some gears to a specific standard, which only specifies the rack profile.

I can see a tutorial for converting a pinion to a rack length, but can't see how it could be reversed.

Many thanks in advance.

[wmhazzard]

Unless the rack is some one of a kind non standard, you can just use the spur gear plugin available under tools. The rack should be either a diametral pitch or a module. 

[TheCADWhisperer]

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@richardsmith55WQ5 wrote:

 I need to create some gears to a specific standard, which only specifies the rack profile.

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Can you share this standard specification?

[richardsmith55WQ5]

Thank you for the response. It's BS 4582-1 for fine pitch involute gears. It has a fairly standard basic rack, similar to the standard ISO model, but they also requests a lot of tooth count and application specific alterations. I was hoping to generate each unique gear from a modified rack profile and possibly find a technique to use for future asymmetric gear tooth work. Maybe some kind of linear to polar image translation?

 

[TheCADWhisperer]

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@richardsmith55WQ5 wrote:

... but they also requests a lot of tooth count and application specific alterations.  

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Who will manufacture these gears and what process will be used?

Hobbing?

Injection Molding?

3D Printing?

[richardsmith55WQ5]

It will most likely be hobbing or precision CNC. On drawings it says just to specify the standard, along with specifics such as the addendum modification coefficient, which is fine, but it doesn't really help me put it into CAD. The alternative is to just represent the gears using a generic reference circle disk for the sake of assembly, but I was hoping for a bit of refinement. Is there no way to just "bend" the sketch into a circular base pattern?

[TheCADWhisperer]

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@richardsmith55WQ5 wrote:

 Is there no way to just "bend" the sketch into a circular base pattern?

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This really wouldn't be the correct way.

Somewhere there is a gear generator add-in for Fusion, but I suspect it would be best to first research the topic of Involute Curves.