sprockets profile accuracy

[Anonymous]

Hello All,

In the past users complained about the accuracy of the profile exported from the design accelerator.

The design accelerator has the settings available to create a correct profile.

Has anyone tried cutting on CNC any sprocket generated from Inventor 2020 or 2021?

[JDMather]

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@Anonymous wrote:

In the past users complained about the accuracy of the profile exported from the design accelerator.

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I have never heard this complaint about roller chain sprockets.

I have not double checked for this response, but I thought the sketch used exactly the same geometry found in the Machinery's Handbook (and shown in your image).

Perhaps you were thinking of involute spur gears - which are simplified cosmetic geometry by default.

[Casey.P]

@Anonymous,

I agree with @JDMather, I never had a problem creating a drive sprocket for roller chains with this option (I was skeptical about this option in Inventor when I worked for Diamond Chain and checked the sprocket I produced against B29.100 standards for sprocket design as well as our own drives examination software). Also, CNC cutting roller chain sprockets is not the best for the precision class chain...Engineering class sprockets could be better suited for CNC cutting, but those types of sprockets aren't going to be able to be created using the roller sprocket option.