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Author Topic: Ham IV Rotor to Mast U bolt  (Read 472 times)
NU0P
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Posts: 14




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« on: August 09, 2002, 10:09:42 AM »

I have lost one of the U Bolts that are used to clamp the mast to the rotor.  Does anyone know the proper size of these.  I could not find the dimensions in the manual that came with the rotor.

I think they are 3 7/8 diameter 1/4x20 but am not sure.Does someone have one of those laying around the shack and can take some measurments for me?

steve
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WB2WIK
Member

Posts: 20543




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« Reply #1 on: August 09, 2002, 11:06:09 AM »

I could go home and make this measurement for you, but you'd be incredibly lucky to find anything close, anywhere.  The U-bots used in the rotors are specialty items, stainless steel, very long threads -- I've never found anything close, anywhere, except buying spares made by the rotor manufacturer themselves.

Luckily, those are readily available!  http://www.rotorservice.com, which is Norm's Rotor Service in Maryland, is one dealer who stocks these U-bolts and can ship them same-day.  

WB2WIK/6
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