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🏠Home🏠RC Main Discussion › One way Bearing keeps locking up!!!
03-10-2021 10:30 PM  30 days ago
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Diesel05

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Pasadena MD

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One way Bearing keeps locking up!!!
I have a brand new Align 600XN. The main gear auto one way bearing keeps locking up. I Realigned the main shaft in the main bearings still locked up. Replaced one way bearing 2 flights in locked up new bearing.. I can break it back loose but what is causing this and how to fix...
thanks
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03-11-2021 10:05 AM  30 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Autorotation subsystem is looking up for two reason :

1. Absence of lubrication.
2. It is Damage the hub, the one way bearing or both.

When you said, you change the one way bearing, you mean the whole system or just the bearing?

Did you replace the hub?
The hub is the collar that works inside the one way bearing, its works spinning in one direction and look up in the other because the one way bearing.

If the surface of this hub is irregular, it is damaged.

/
Saludos cordiales,
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03-11-2021 07:25 PM  30 days ago
Diesel05

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Pasadena MD

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I changed the entire system, plenty of lube..
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03-12-2021 03:58 AM  29 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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/

This is hard to believe that two entire systems fail for no particular reason.

Is there a possibility that the issue is on the gears? Could be eccentric and that could cause noise and look up at low rpm...

/
Saludos cordiales,
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03-12-2021 05:37 AM  29 days ago
dkshema

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Cedar Rapids, IA

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This is an overrunning clutch, not a bearing. Large amounts of any kind of lube are detrimental to proper operation.

The clutch locks the main drive gear to the shaft when driven, and allows the shaft to free-wheel when the gear is not driven. Very little RPM and little friction involved when free-wheeling.

As a clutch, why would you lube it? It is either locked up or disengaged.

There is no need to lube it. Best you should do is clean a new one-way clutch with automatic transmission fluid, dry it and remove any excess ATF, and install it. Do not add oil or grease, this only collects dirt and grime causing premature failure.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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03-12-2021 06:46 AM  29 days ago
heli4fun

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TRUMP, USA

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Good advice dkshema!
Finally someone that knows what their talking about when helping others!
Some people think their experts and can give "BAD" advice/suggestions to others,they really should "STOP".I've had some members here PM me about this same person not knowing what he's talking about and giving bad advice...
But he'll continue anyway,because of his "EGO".
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03-13-2021 04:30 PM  28 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Very good!
Check the collar inside the OWB...

/
Saludos cordiales,
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03-13-2021 05:26 PM  28 days ago
Diesel05

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Pasadena MD

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A brand new one way bearing comes with lube in it from factory. Brand new Heli kit and one way bearing gets stuck on maiden.. I can break it loose but just get struck again. Never had this problem with my 600N’s
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03-13-2021 06:16 PM  28 days ago
balsabasher

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Central Ohio, USA

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It may be that the one way bearing or the ball bearing is not seating square in the main gear case. Or the one way bearing shaft is out of round.
Just a suggestion.
Blades; what goes around, comes around!
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03-13-2021 08:32 PM  28 days ago
wjvail

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Meridian, Mississippi

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dkshema This is an overrunning clutch, not a bearing. Large amounts of any kind of lube are detrimental to proper operation.

The clutch locks the main drive gear to the shaft when driven, and allows the shaft to free-wheel when the gear is not driven. Very little RPM and little friction involved when free-wheeling.

As a clutch, why would you lube it? It is either locked up or disengaged.

There is no need to lube it. Best you should do is clean a new one-way clutch with automatic transmission fluid, dry it and remove any excess ATF, and install it. Do not add oil or grease, this only collects dirt and grime causing premature failure.
Hmm... Interesting advice. I've never thought of it that way.

I have always flooded or filled the one-way on my helicopters. I suppose that goes back to my earliest days flying X-Cells (mid/late '80s). Their advice was to fill the "bearing" with Tri-Flow or ATF. I've always pictured the oil "floating" the elements of the OW. It's always worked for me but I'll admit, most of the oil I use for assembly doesn't stay long.

As a reality check I just pulled up the first manual I could find - an Align 700 - and they still recommend applying grease to the OW.
http://www.align.com.tw/ManuaLib/He...H70E23-25XT.pdf

And I might add that while it seems counterproductive, oiling a "clutch" is hardly rare. Almost all motorcycles have a "wet" clutch. That is, the clutch pack is bathed in the engine's motor oil. Ducati is known for the rattle of their dry clutch and are something of a rarity. It seems odd but the friction plates of my two Suzuki's are literally swimming in 10W-40 oil.

Anyway, something to think about.
"Well, nothing bad can happen now."
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03-15-2021 02:41 AM  26 days ago
Diesel05

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Pasadena MD

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UPDATE: I took the one way bearing out of my 600N and it installed it in my 600XN. Took it out flying today never locked up once!! Weird has to be a bad run of bearing...
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03-15-2021 07:36 AM  26 days ago
EEngineer

rrProfessor

TX

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Just be careful when installing the UWB so that its roller
bearings are not displaced from its seating.
Logo 600SXs, 800XX, TDR IIs
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03-15-2021 09:34 AM  26 days ago
Chris.C

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Hong Kong

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I normally grease OWB with OWB grease. Align has this grease for sale before. Yes, it would catch dirt but this is part of my maintenance job.

Normally, in my case, the hub will worn out first and then the OWB.
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03-15-2021 01:02 PM  26 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Chris.C Normally, in my case, the hub will worn out first and then the OWB.
/
/

The hub.
That is correct.

This "pair", hub plus OWB, should work always together.

You can "rectify" using sand paper but the result is not reliable.

/

See this hub... Raptor 50... 300 flights... Look worn out but still working...

OWB on the left.

/
Saludos cordiales,
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03-16-2021 09:33 AM  25 days ago
EEngineer

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TX

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Good that you got it fixed.Logo 600SXs, 800XX, TDR IIs
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03-16-2021 03:58 PM  25 days ago
Four Stroker

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Atlanta

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You guys have apparently forgotten the dozens of threads on this subject from when the 600N first came out. Get an actual industrial NSK/Koyo FC12 bearing and it will never lock up. Any excess oil or ATF will run out of the clutch. Some greases not so good.
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