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HelicopterHIROBOOther › Freya One way bearing question.
03-13-2003 07:48 PM  14 years agoPost 1
Eran

rrNovice

Manara- Israel

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Hi guys, Last week I flew my freya (OS91), And suddenly the engine raised RPM. I autoed it, took out the main gear, and found that the one way bearing had a crack in it.
Bought a new one which came in today, I put it in and I noticed that it has a little play indside its house (about 2mm play), as if the plastic in the house got worn out.

I am about to order the metal house.

Question is: Will this play crack another bearing? should I wait for the metal house to arrive before flying this machine again?

Please give me your opinions.

Eran Pereldik
Israel

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03-13-2003 07:56 PM  14 years agoPost 2
z11355

rrMaster

New England

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I would wait for the metal housing.

The secret to getting a long life bearing
is to make sure the all of the edges
of the bearing are touching the bumps
on the inside of the housing. If you have
a bearing edge unsupported, you will
have problems.

Some people go as far as putting RTV
in the empty spaces between the
bearing and the hub but you must
be VERY careful to keep the bearing
from getting contaminated.

edit: use epoxy instead of RTV. I
dont know what I was thinking in
writing RTV.

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03-13-2003 07:57 PM  14 years agoPost 3
rotormouth

rrApprentice

Irvine, California

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Replace it with the metal housing, especially with a 91. That is a known weak point. It has happened to several people I know.

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03-14-2003 01:14 AM  14 years agoPost 4
Chris.C

rrVeteran

Hong Kong

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Another way to this problem is to glue the one way bearing inside the plastic hub with epoxy. I saw this in Hirobo's catalog of last year.

Cheers

Chris

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03-21-2003 11:58 AM  14 years agoPost 5
Eran

rrNovice

Manara- Israel

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I have installed the metal housing..

And still have some play (1mm aprox). of the bearing inside its house.
What's next? RTV the edges? will I be able to disassemble it later?

Please help...
Eran

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03-21-2003 12:31 PM  14 years agoPost 6
z11355

rrMaster

New England

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a correctly installed bearing should
be a press-fit inside the metal housing.

Can you post a photo of the situation?

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03-21-2003 09:00 PM  14 years agoPost 7
richardf

rrVeteran

San Diego, CA USA

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Zero Play

I just installed a bearing in a metal hub and had to use a puller since it was so tight. I'm not sure how or why you would have any play.

Richard.

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03-21-2003 11:03 PM  14 years agoPost 8
Eran

rrNovice

Manara- Israel

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Weird..

Guess the new bearing I got is a little smaller or something.. since the old bearing (the cracked one..) does fit in tightly.
Anyway, I did it with Epoxy, and it seems tight now.. hope it will work fine..
Thank you everybody..
Eran

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03-21-2003 11:06 PM  14 years agoPost 9
Dazzler

rrElite Veteran

Ohio

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I think I may order the metal hub also, you guys are talking about the autoratation case, and the part # for the metal one is 0414-229 right?

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03-21-2003 11:40 PM  14 years agoPost 10
richardf

rrVeteran

San Diego, CA USA

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Dazzler

.

Yes, that's the one.

Richard.

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03-22-2003 12:47 AM  14 years agoPost 11
Dazzler

rrElite Veteran

Ohio

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Thanks Vor503rf

I think I'll go ahead and order one next week!!!

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