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HomeAircraftHelicopterHelicopter Main Discussion › cleaning and oiling one way hub opinions
11-10-2013 03:11 PM  5 years agoPost 1
mustang67ford

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Central Pennsylvania

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I was doing a search on the best way to clean and oil a one way hub and seen various approaches. Wondering how most of you do it. I have heard of soaking them in denatured alchol or kerosene for a few days, then soaking them in ATF for a few days. I amd currently just wiping them out with a piece of paper towel and maybe a little rubbing alcohol then oiling them with tri-flow.

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11-10-2013 03:16 PM  5 years agoPost 2
rcnut

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Rockford, Illinois

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I put the sprag in dishwasher to make it bone dry. added a couple of drops of ATF and now it flies great.
This is how the MA pilots are doing it.

Team Miniature Aircraft
"I love the smell of Nitro in the morning!"
...Citizen 654!

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11-10-2013 03:49 PM  5 years agoPost 3
sansone

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North Florida USA

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I like a drop of motor oil or grease.. I only clean if a crash left sand in there. If cleaning is needed I use whatever is handy, gas, paint thinner, etc.

Fusion 50 FBL / Futaba 8FG / Beastx

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11-10-2013 06:45 PM  5 years agoPost 4
YSRRider

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usa

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I am a big fan of chlorinated brake cleaner. It cuts grease well, dries fast, no residue and seems to be good on plastics.

you could soak the bearing in it for an hour and then blow out well with compressed air. Compressed air is the miracle for cleaning things, just be careful in certain areas obviously....

to grease the bearing, plug one side with your finger, push grease in from the other side and then firmly press the grease in so it pushes inside the bearing. Tri-Flow silicone was the good stuff to use back in the day. Dont really think there is a difference? silicone might be harder to clean out later so you may want to use a red high temp grease or I like waterproof grease myself. Bel-Ray brand from the motorcycle dealer is good.

There are some cheap greases out there that seem to be kind of grainy, I would not use them. Last stuff that comes to mind was a generic type wheel bearing grease that I bought from PepBoys in a can.

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11-12-2013 08:54 AM  5 years agoPost 5
Volcano

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chicago

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Id do the atf, I greased a goblin one way and it self destructed right away.

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11-12-2013 11:21 AM  5 years agoPost 6
Retired2011

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Lee's Summit, MO

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Id do the atf, I greased a goblin one way and it self destructed right away.
That's what I learned...never use grease.

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11-12-2013 03:57 PM  5 years agoPost 7
dkshema

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Cedar Rapids, IA

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Some grease attacks the plastic cages used to house the rollers and springs. Grease also does a marvelous job of collecting and holding onto dirt, grit, and just about any other nasty foreign objects around your heli. It also dries out.

Clean well, use ATF. It's the only way to fly.

-----
Dave

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

Team Heliproz

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11-12-2013 04:45 PM  5 years agoPost 8
RAK402

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Alhambra, CA

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"Some grease attacks the plastic cages used to house the rollers and springs. Grease also does a marvelous job of collecting and holding onto dirt, grit, and just about any other nasty foreign objects around your heli. It also dries out."

Once again, you are very wise, sir.

Grease can also cause the very small rollers to stick, either locking the clutch up or preventing it from fully engaging (i.e. all rollers together, locking and unlocking when they should).

Team KBDD/Compass Team Manger/Experience RC/Team JR Americas/WR Field Rep

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11-12-2013 05:01 PM  5 years agoPost 9
utahbob

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St. George Utah

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one way
A learned heli-friend told me about using plane old 3in1 oil years ago--tried it and haven't had to use anything else--I just put three drops on the bearing above the one way on my. models every other flying session and let gravity do the rest I havea 600n with over 600 flights on it with the same one way!

I do a great decending funnel!

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11-12-2013 06:11 PM  5 years agoPost 10
dkshema

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Cedar Rapids, IA

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By the way, this is is a clutch, not a bearing.

When was the last time you all went out of your way to grease the clutch in your nitro birds?

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Dave

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

Team Heliproz

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11-13-2013 02:00 AM  5 years agoPost 11
Retired2011

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Lee's Summit, MO

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By the way, this is is a clutch, not a bearing.
Very good point!

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11-13-2013 02:51 AM  5 years agoPost 12
NQNA

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USA

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I use plastic/synthetic safe gun parts cleaning spray. Eats the old lubricant, evaporates and then I relube.

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11-13-2013 03:26 AM  5 years agoPost 13
NQNA

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USA

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It is a bearing.. -- One Way Needle Bearings

The One Way Needle Bearings (or freewheeling unit as it is more commonly known in full size aviation) is the central bearing in the main gear assembly, that allows the main gear (and the tail drive gear / pulley) to spin freely in the event of the engine or motor stopping. When under power, the One Way Needle Bearing locks the gear and shaft together so they spin as one. This allows the main rotor to spin freely during autorotation while still driving the tail rotor so tail control authority is maintained throughout the auto.

http://www.lily-bearing.com/en/topi...dle-bearing.htm

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11-13-2013 04:33 AM  5 years agoPost 14
dkshema

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Cedar Rapids, IA

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It's job is to transmit power to a shaft, or uncouple the shaft from a power source.

Over running clutch is yet another term.

We can argue clutch vs bearing all day long. In the end, as long as it's locked up, it is turning at the same rate as its driven shaft. When it's not locked up, the shaft spins freely within it.

Grease will eventually defeat its purpose.

Bearings generally don't transmit torque or force. Clutches, do.

The Lily Bearing company might need to rethink what it is they are selling.

-----

Drawn Cup Roller Clutch, anyone?

http://www.timken.com/en-us/product...nCupRoller.aspx
Clutch-only units should be used with external radial support to hold the shaft and housing concentrically and carry radial loads.
"For transmitting torque between a shaft and the housing"

http://www.nationalprecision.com/ne...ller-clutch.php

-----
Dave

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

Team Heliproz

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11-13-2013 03:37 PM  5 years agoPost 15
Four Stroker

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Atlanta

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Drawn Cup Roller Clutch
Standard industrial term for our one-ways ! Dave wins.

Good pdf: http://www.nskamericas.com/cps/rde/...%20Clutches.pdf

Note that some have radial roller bearings on each end. I have never seen one used in RC.

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11-13-2013 04:45 PM  5 years agoPost 16
dkshema

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Cedar Rapids, IA

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It's not really about winning/losing. The function the one-way device performs is that of a CLUTCH, therefore it should be treated as such.

Some heli manufacturers actually DO/DID use a couple of standard radial bearings -- one above, one below -- in conjunction with the clutch. This allowed the clutch to really do its job, while the radial bearings provided proper support for the shaft.

-----
Dave

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

Team Heliproz

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11-13-2013 04:54 PM  5 years agoPost 17
Four Stroker

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Atlanta

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Before Align, every single heli that I saw had radial support both above and below the one-way CLUTCH. Sometimes just bronze bushings.

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