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Blade Balancing  Rate Topic 
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 Posted: Tue Feb 11th, 2020 01:51 pm
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Steven P Dempsey
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Tried using this gauge to bend blades back, problem is with all four bent, I don't have a baseline to measure from! I messed around and made it worse, even on low speed it shimmies & shakes. Guess it's strobe time, which I don't have. There was as much as 1/2 deflection from one blade to another, as measured from the leading edge. These have a very subtle curvature, plus the spider(s) could be bent, this fan took a heck of a hit to bend all 4 struts back over. 





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Balancing Tool 2.jpg

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 Posted: Tue Feb 11th, 2020 01:52 pm
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Steven P Dempsey
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I'll bring it to Aiken & let you guys play with it - time for a blade balancing work shop!

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 Posted: Tue Feb 11th, 2020 02:19 pm
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Steven P Dempsey
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Here is a file shot from another fan -I see the trailing edge of each blade needs to come close to the back of the cage



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Emerson Damage 1.jpg

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 Posted: Tue Feb 11th, 2020 02:22 pm
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Steven P Dempsey
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This would be a nice treatment, (later model 77646) all that black is rather bland.

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 Posted: Tue Feb 11th, 2020 02:25 pm
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Steven P Dempsey
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And I have this poor 71666 with a bent blade:



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 Posted: Wed Feb 12th, 2020 09:49 pm
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David A Cherry
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it takes two indicators one from the front and one from the back at the same time, you can switch back-and-forth obviously this is done after you eyeball the angle the best you can, then you must put it on a balancer. they sell a very cheap one on amazon...it looks like a piece of junk but it works beautifully I have balanced many many blades on it and have nothing but good words to say about it.. sells for about $25 
Du-Bro 499 Tru-Spin Prop Balancer https://www.amazon.com/dp/B0006N72Y8/ref=cm_sw_r_cp_tai_vqhrEb4GBHQ88

Last edited on Wed Feb 12th, 2020 09:55 pm by David A Cherry

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 Posted: Thu Feb 13th, 2020 03:59 am
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Steven P Dempsey
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Thanks David. I will give it a try

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 Posted: Thu Feb 13th, 2020 04:00 am
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Steven P Dempsey
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Cheaper than a new blade

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