I think I already screwed it up ;-/

[termite]

I'm building a T-rex and have it almost completed. I decided to add some color just to make it different. I tried to dye the landing gear (turned out great!) and the main drive gears. I figured I could blow dry the main bering with my air compressor and oil it up good to keep it working properly. However after re-assembling the main gear it moves BOTH ways Has anyone experienced this? and if so will I have to replace that gear/bering combo?

Thanks.
Mark

[Danimal]

Hi termite
When you say that you oiled the one way baring do you mean that you actually added oil to it?
If so that may be the problem. The baring's in the main gear takes a special type of grease.
Go to the bottom of the page in this link and you will see " Grease for one way Baring's"
http://helihobby.com/html/adhisves_and_lubes.html

[deanmax]

also the bearing cage is your problem probably started to deform. I'm not sure if you can find if its just a small deform spot you might be able to heat it back in place. just take the interrace out and turn the bearing see how they move. It could be that if it is just a little tight a little work with a razor knift or heat could get you in the air. Its not the best idea but if it will get it to work until you get a new one hey you be flying.

[chaos]

Well... I used white lithium grease in my Hirobo. I got a Raptor and used it there also. Then one day I decided to upgrade my grease so I cleaned out the one-way and put Lubriplate EMB in it. That worked also. Then one day I noticed my LHS had some official Thundertiger one-way grease, so I bought some. Washed out my one-way again and loaded the official grease in it. That worked ok also. Then I ran into a fellow who said the official grease locked up on him, and he switched to Triflow and swore by it. So I washed out my one-way again and gave it a dose of Triflow. That works ok also. I'm beginning to think lard would be ok. Anyway, my one-way ought to be pretty clean.

I'm suspicious that your one-way outer race is slipping in the gear. You could put a mark on the outer race and the gear then hold the shaft still and turn the gear the wrong way, maybe 1/4 turn, then check to see if the marks still line up. I'm guessing they won't. I can't say for sure but I don't think it's possible to find any lube that will allow the shaft to rotate against the one-way the wrong way. The least bit of drag jams the rollers against the shaft, and the harder you try to turn it the tighter it grabs. Perhaps I'm wrong but it's easy to check to see if the one-way is slipping in the gear. I'm not so sure what to do if so. Green Locktite is good for this sort of thing when it's metal to metal, but I donno about metal to plastic.

[Danimal]

Hi chaos
I've also herd that you can use all different types of grease on your one way's. The one from Heli direct is the only one I have tried. I have always had good results with it and its cheep enough. The reason that I even mentioned it was that termite had in the first post that he used oil on his baring. But I guess it doesn't mater now I just saw another thread that he started and says that he has every thing working now but didn't mention what the problem was.
You say your using Triflow now? that's the same brand of lube that I use on my swash and other baring's. Where do you get your Triflow for the one way baring?

[chaos]

Hi Danimal... I'm glad termite got the problem solved... hope to find out what it was.

The Triflow that I use is the same stuff you use... oil... not grease. However, Triflow does make a grease and you can get it here, but notice it says, Not good for t/r gearboxes or other metal to metal. For that use a lithium based grease. I don't know what to do with that grease. I don't have any.

But I think the next time I decide to mess with my one-way I'm gonna put the Lubriplate back in there... my dad used to sell Lubriplate and he was a lubrication engineer... said it was the best. You can get the Lubriplate from the link above.

Here's what it says on the Lubriplate: "A long lasting, water resistant, polymer type grease formulated especially for the lubrication of electric motor and fan bearings, ball and roller bearings. Works well over a wide temperature range."

They also sell a "Greaser". This is a neat little tool that jams grease into a bearing. You have to have the bearing by itself rather than installed in something... but in some cases you can get around that. Ricks is out of the Greaser. I've seen it for sale elsewhere but I forget where.

The one-way bearing doesn't get a very heavy workout because normally the gear (with the one-way) is trying to drive the head and so the bearing is locked to the shaft, and the bearings are not turning... it isn't doing any usual "bearing" type work, just grabbing the shaft. If that's all it ever did it wouldn't need any lube at all. The only time it works like a bearing (with the rollers turning) is when the shaft wants to go faster than the gear/bearing. In that case the rollers are being rolled out of the ramp that jams them against the shaft. A spring pushes them against the shaft, but the rotation rolls them out of the slot. When normal running, the rotation rolls the rollers into the slot, jamming them against the shaft, at which time they stop rolling.