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how to make an involute curve

how to make an involute curve

how to make an involute curve

(OP)
I'm trying create a gear.  It would be nice if I could actually make an involute curve.  Is it something that has to be done with VBA?  Or could I use a spreadsheet and import it into Inventor?

RE: how to make an involute curve

How accurate is your machining process?  You can define an involute curve (spline) for a gear with as few as 5 points that is better than most manufacturing processes can hold on the tolerance.  Of course if you don't need a true involute simply used the Wellman's Odontograph form in the Inventor Design Accelerators.

RE: how to make an involute curve

(OP)
I'm stuck with Version 9.  I don't think an accelerator is available but that forum looks good. I'll spend some time looking through those threads.

For now I'm just making assembly drawings and I want the parts to look fairly close to what they are.  But you're right - for this just an approximation will work fine.

Thanks to the both of you.

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