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Author Topic: Hub Diameter Calculation  (Read 435 times)
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dchib
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« on: April 05, 2020, 12:55:06 AM »

I plan to install a clamp screwed to a circular gear to fix the gear securely to its shaft.  I'd still like to have spokes on the gear but need to be sure the hub diameter is sufficien t to accommoda te the clamp screws.  Hub size is given as a ratio.  Is there a simple formula to give the hub diameter based on one or more of the dimension s displayed for the gear.  Perhaps I'm missing something obvious but I've tried to determine a formula without success.  Can you help please.  Cheers
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dchib
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« Reply #1 on: April 05, 2020, 01:24:33 AM »

On closer examinati on the formula looks to be

HubDiamet er=PitchDiameter x Ratio/100 + HoleDiame ter

If you could confirm I would appreciat e it
Thanks
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ArtF
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« Reply #2 on: April 06, 2020, 03:08:17 PM »

Hi:

 Yes, you got it. Most of the formulas are based on pitch curve and requested hole diam..

Art
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