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HelicopterAlignOther › Two Issues Main Shaft Bearing Blocks & One-way
11-28-2007 12:31 AM  10 years agoPost 21
CrashMaster91

rrApprentice

Phoenix, AZ

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I've got about a gallon of fule through my bird and haven't experienced the problems that all of you have had. j5coat is the only one at the flying field that i've heard to have problems.

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11-28-2007 01:33 AM  10 years agoPost 22
PilotCK

rrVeteran

Scottsdale, AZ

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j5coat, Have you crashed your heli yet Bent the main shaft or struck the blades in the ground? If not I bet your bearing will fail on the main shaft.

~Team Collective Mayhem

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11-28-2007 01:36 AM  10 years agoPost 23
tchavei

rrProfessor

Portugal

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Mines are notchy too. You can do a simple test to see if your bearings are shot. Put the bird on the ground, hold the body tight and with your other hand move the head back and forth. If you feel a slight movement, bearings are shot.

On my next stripdown, I'm changing my bearings to something better. Anybody with the bearing sizes needed? I think the upper two are the same but the lower one is smaller?

Tony


--------------------
"Perfection and patience usually walk side by side..."

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11-28-2007 01:59 AM  10 years agoPost 24
PilotCK

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Scottsdale, AZ

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I am giving these guys a try and seeing if it will improve anything. I figure its worth a try before I spend some more $$ on better trial bearings. I have heard some good stuff on these bearnings because of the ABEC-3, these are the same as RC-Bearings specifies!

http://www.helidirect.com/index.php?cPath=95_108

~Team Collective Mayhem

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11-28-2007 02:35 AM  10 years agoPost 25
fiveoboy01

rrVeteran

Waunakee, WI - USA

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MJHiscott92504, you sure they have trust bearings? can anyone else confirm?
He said they DON'T have thrust bearings.

I can confirm this, I have the Align metal blocks and they came with radial bearings.

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11-28-2007 02:38 AM  10 years agoPost 26
HOTROD2

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East Tennessee-USA

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It's the ones from G-Force that have the thrust bearings.

T-rex 600N, EVO 50, T-rex 450 x2, DX7

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11-28-2007 03:01 AM  10 years agoPost 27
Filby

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Adelaide, South Australia

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Have you crashed your heli yet Bent the main shaft or struck the blades in the ground? If not I bet your bearing will fail on the main shaft.
Woa woa! Slow down Einstein! So you're telling me if you crash your heli then stuff breaks!?

PS Over 100 flights and the main bearings aren't great but they aren't causing any problems. Also never once had a oneway bearing seize.

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11-28-2007 04:22 AM  10 years agoPost 28
MasterCrasher

rrApprentice

Not sure.

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It seems to me Align bearings are pretty cheap. Some see a lot of stress and others don't, the ones that do show it early on. I plan on just replacing those as needed with Boca's or some other brand. Its also possible they are under lubed or not lubed at all. I haven't taken one apart to see whats inside but it could be part of the reason they fail. It wouldn't hurt to grease them when their new, or at least drop some oil on them.

I also plan on getting the G Force blocks with the thrust bearing in them when their back in stock. If your not familiar with them go to RediHeli's site and click on upgrades if you want to check them out.

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11-28-2007 05:53 AM  10 years agoPost 29
PilotCK

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Scottsdale, AZ

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Filby,

I'm not saying that stuff will break of course it will. However bearings should last through a couple of crashes don't you think?

I'm not hear to criticize people, just get information and learn from others. My opinion is only mine and that's what I post to see if others have any of the same problems and rule out issues

~Team Collective Mayhem

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11-28-2007 06:09 AM  10 years agoPost 30
Filby

rrApprentice

Adelaide, South Australia

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Yer I would think that bearings should survive a crash but not if the main shaft gets bent or the head takes a big hit. This is going to put a huge load on the bearing and will likely damage at least the inner race, and thats whether its a cheap or expensive bearing. The main problem with these bearings are that they're cheap and need to be greased before being used but I think thats what you can expect from a relatively cheap kit.
Also I havent noticed any lack of performance or any other issue due to notchy main bearings.

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11-28-2007 01:45 PM  10 years agoPost 31
JuanRodriguez

rrProfessor

The Villages, Florida

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However bearings should last through a couple of crashes don't you think?
No... usually they don't. They are not designed to take the side load impact sustained during a crash.....

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11-28-2007 03:20 PM  10 years agoPost 32
SPB

rrElite Veteran

Athens - Greece

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I also replaced the stock main bearings with SKF. I packed them with grease using the greaser and have no issue at all.

Also my one way auto bearing so far is smooth as silk. I am always using in my one way auto bearings a lubricant called Break-Free and never had an issue. This lubricant can be found in gun shops as it is used for the lubrication and cleaning of guns.


Sotiris
myhelis.com Flying Team

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11-28-2007 06:13 PM  10 years agoPost 33
Helinutnz

rrElite Veteran

below 42 South

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align bearings are crap. Hirobo ones last a long time as proven on my evo 50 and I use the greaser. The stock align bearings have a good deal of play in them almost from new....at least mine did. The hirobo ones don't seem to probably because they are a quality japanese bearing?

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11-28-2007 11:30 PM  10 years agoPost 34
Matt-Drummer

rrApprentice

Suffolk, United Kingdom

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From Helimagic25 (However the one-way main gear will spin freely when idling then catch and the blades will then continue to spin. Seems as though the gear spins the opposite way then catches I believe this is causing my issues with the bearing being bad. On load, the one-way does not have the issue, only when spooling up or idiling)

Hello, I'm sure you have probably thought of this but could it be your engine running backwards when you start it? This is exactly what happens and as you throttle up it kicks back the correct way. When its running backwards the main gear will turn in reverse and the blades won't spin because of the one way bearing. It sounds funny but its quite a common occurence with glo engines.

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11-29-2007 02:12 AM  10 years agoPost 35
tchavei

rrProfessor

Portugal

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I just found some ABEC 5 type bearings 10x19x5 with teflon coverings from my racing days... I wonder if they work ok as mainshaft bearings on the 600N?

Tony


--------------------
"Perfection and patience usually walk side by side..."

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11-29-2007 04:17 AM  10 years agoPost 36
Helinutnz

rrElite Veteran

below 42 South

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dont tighten the lower jesus bolt too much. It will tweak the oneway shaft out of round and the one way will lock up. Original one way here with grease removed and triflow added. No lockups.

Flamesuit on and laced.

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HelicopterAlignOther › Two Issues Main Shaft Bearing Blocks & One-way
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