BeefBear

What are the types of bearing used in the head. Can anyone indicate the role of the bearing ( and Russell I'm not talking about "it allows the rotor to turn") in thrust terms? Are certain types of bearings more acceptable than others i terms of side loading and speed?

Ted

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Bob

Seeings as how no one has responded to your plea fer info...
I currently have the rotor head off my gyro and can get the berring numbers off it fer ya ...I think....( without takeing it out'a there ! )

if that would help I'll certainly do it fer ya !
...Bob.......

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Mitch

Ted,

Do a search on the US forum. Doug Riley and others make comment re: these matters. You will find extensive info there on what the numbers/letters refer to also.

Cheers,

Mitch.

BeefBear

Yes sounds like its the only option. Shame the Aussie guys don't seem to know their bearings. Or maybe they have never had to strip the head down for refurbishment.

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russ

Contact jerry goodwin [ sydney ] and rossco [ broken hill ]

both know the answers, and more.......but don't use the net......pity

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Les

G'day Ted, A new spare rotor head bearing came with my gyro, it's a NACHI 5206-2NS. Made in Japan, im sure you could match it up to other brands. It's a heavy duty bearing. Hope this can help you.

Les.

SamL

Ted
I replaced my rotor bearing about 12 months ago. It had a NTN 5206Z made in Japan. This is a very good quality double row bearing used alot in washing machines.
I asked about other better quality replacements, and was told the best 2 are the FAG 3206B.2ZR.TVH made in Italy and the one I had.
Of the 2, most suggested I go with the Italian made FAG.
It has been going for about 60 hours now without a hitch.

Hope this helps. Sam

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BeefBear

Thank you Les & Sam. I can now go and look for info on the properties these bearing hold.

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maulonir

My personal choice would be to use an SKF Explorer bearing XXXX2RS. The 2RS refers to the sealing arrangment of the bearing which in this case uses 2 rubber seals which compleatly seals the lube in and the sh!t out. The Z after the bearing number refers to a zinc shield which does not actualy make a seal on the inner race which unless the bearing housing is sealed "unlike mine is" it will allow dust and moisture to contaminate the rolling elements and shorten the life of the bearing. The advantage of the zinc shield type seal is the reduced friction as there is no contact between the seal and the inner race like which occurs on the rubber seal set up however on a setup like a rotor head this friction is insignificant. Another thing to watch is some bearing manufactures use less rolling elements in their bearings to make them cheaper this can significantly reduce the load carrying capacity of the bearing and cause premature failure. Hope this helps
rob

BeefBear

Thank you Rob. I understand the naming convention when used with bearings, so my interest was primarily in the load capacity ratings.

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