RunRyder - Any way to grease main bearings?

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Main Discussion > Any way to grease main bearings?

T Koffler
Heliman
Location: Cayuga, NY

Hi guys,
I removed the main shaft on my ST to install a set of split collars and noticed that the upper main bearing was kinda dry feeling. (not REALLY notchy). I was wondering if there is any way to get some grease in the bearing to smooth things up a little? I think the bearing was causing a slight glitch in the rudder also. I would lube everthing up with TRI-FLO before I would fly and after about the 4th flight of the day I would notice the little glitch. I only have maybe 25 flights on that bearing...

Maybe I put too much lube on things and it desolved the grease in the bearing?

Any ideas?

11-22-2001 Over year old.

Beach
Heliman
Location: Shelton, CT

Along with your inquiry, I was thinking of buying "the greaser" Is this a useful tool? After many many hours of flying with my gasser I inspected the main bearings and they seem fine. So I don't know if it would be worth it to purchase one. Anyone have experience with one?
Thanks

11-22-2001 Over year old.

BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

The Greaser

Yes, I have one and after a bit of practice it works great

The stuff that came out of a brand new bering looked "watery" and it didn't look like it would have provided much lube to the bering, I guess the manufacturers just put the min. grade of grease in there to cut costs.

It's one of those neat tools that you wonder how you got along without. Admittedly I haven't used it a lot yet, but I plan to do every bering on my new helis, as well as, the older ones when they need to be lubed. It is a quality tool and not cheap,but anything worth haveing usually isn't.

Check out page 2 and scroll down to "the lube page" to see more.------BladeRunner.

11-22-2001 Over year old.

Steve Campbell
Elite Veteran
Location: Baton Rouge, LA

The Greaser is indeed a great tool; the problem, as Todd has discovered, is how to use it on a bearing that is already fitted in a block.

Pete, the designer of The Greaser, has told me that is a simple matter to make fixtures to accomplish this. Maybe so, but darn if I can figure it out. I keep meaning to call and ask him, but simply have not gotten around to it.

Todd, this is most definitely a worthwhile investment. The high speed bearings (clutch, both ends of the tail rotor) are usually not in blocks, and are easily done. These are the ones that are very important. Yeah, the main shaft bearings are important, too; but they don't work nearly as hard as the others.

Steve

11-22-2001 Over year old.

T Koffler
Heliman
Location: Cayuga, NY

Blade Runner,
Any ideas on how to do it without the greaser?

Steve thanks for the info. I guess I'll have to get one of those greasers. I was looking for a way to do it without the greaser. I hate to fly a bird with a known problem. I guess for now it's just a gripe, not a downer.

I'll just give it a good shot of Tri-Flo before I fly it until I get a greaser.

11-22-2001 Over year old.

BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

Greaser?

Well, on the automotive side of things it's fairly easy to do it by hand, just clean the bering well so all the old grease and contaminates are out, dry it well(BTW it's OK to use air to dry a bering-but NEVER alow the bering to spin dry, it will be destroyed).
Put some fresh grease on your palm(no-not for that!) and work it into the bering, admitedly the small berings that we deal with are a lot harder this way, but you can make it work.
Of course that only works if the bering isn't installed. The greaser can work on most if not all berings in a heli, with the exception of the swash; or maybe even that if you make a jig. There was a link-I think from the guy who makes it that explained several interesting and clever ways to use it.

Definately a "Kewl Tool"-------BladeRunner.

11-22-2001 Over year old.

TotlKaos
Senior Heliman
Location: Vineland, NJ

Greasing Bearings

Well most bearings we use are Shielded.. which even with a presure greaser makes it tough to get new grease into.. If you put oil on the bearings it will wick through and melt the grease right out of the bearings.
There is a way to get the grease back in.. but I usually do this on a big tear down and do it to all the bearings..
The shields can be removed by removing the snapring that sits in a groove on the oustide id of the bearing. if you look closely you will see where there is a gap. take a ping or a small dental tool and lightly pull the starting edge out and slowly working it around so it comes out..
then you can remove the shield and put a good quality grease into the
bearing.. after which you can replace the shield and then the snap ring that holds it in place.. its alot of work.. but keeps the bearings in perfect order. After that avoid using oil on those bearings to keep the grease intact in the bearing.

Hope this helps!

Russ

11-22-2001 Over year old.

Augusto
rrAdvertiser
Location: San Diego, CA

BladeRunner,

is this the one you're referring to?

If so, how do you get it to work with bearings that are installed?

Avant Aurora Ultimate

11-22-2001 Over year old.

BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

Greaser

Yep, that's the one. If you place the whole block on top of the dispenser and plug the center hole of the bering then you can get grease through it.

--------BladeRunner.

11-22-2001 Over year old.

Steve Campbell
Elite Veteran
Location: Baton Rouge, LA

Todd,

Russ' description is the way to do a model bearing already in a block. We're talking SERIOUS tedium, here. I did all the bearings in a TSK MyStar this way once; took me over a week, and I was ready to go nuts before it was over with.

Be very careful when removing the snap ring. If you distort it, it won't go back on right. And never forget the Third Corollary to Murphy's Law: A bearing snap ring that gets away from you will fly to the most inacessible corner of the shop, never to be seen again.

Steve

11-22-2001 Over year old.

T Koffler
Heliman
Location: Cayuga, NY

Happy Thanksgiving guys!!!!

Thanks for all the info guys,
Will the "greaser" push grease into a sheilded bearing such as the main bearing that I'm trying to grease?

After flying my Freya today, I'm gonna need some parts..... So I'll order a "greaser" with my other stuff...... Anybody open tomorrow?

Thanks,

11-23-2001 Over year old.

BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

Greaser?

Even on sealed berings there is a small gap at the edge of the seal, if you take your time and keep a light steady pressure on the greaser it will displace the old grease and add the new, you just need to be a bit more patient with the sealed ones. Be sure not to mix the old with the new, you would just be putting the contaminated grease back in.-------------BladeRunner.

I don't remember where, but I saw an interesting bit on someone's web site where the gentelman was experimenting with different types of grease to find the best all round one to use on RC helis. He was testing for "spin out" (I don't think that's what he called it) but how well the grease stayed in the bering at high speed, how long and how well it would lube the berings etc. etc. it was very interesting and I will try to find it, a few names come to mind,but I don't want to send anyone on a wild goose chase!

11-23-2001 Over year old.

FlyinBrian
Veteran
Location: Illinois

Huh?

Hi,

If you want to use the greaser on bearings in blocks all you have to do is turn the plunger over and use the flat side.

Crunch all you want, they will make more. Please use rr's pm feature to contact me.

11-23-2001 Over year old.

BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

Greaser?

OK, I found the holy grail of how to use the greaser. This is a frequently asked questions page about the greaser and how to use it. It's quite detailed and is an excellent read, get a coffee(or another favourite beverage) and enjoy!

www.petesrc.com/greaser/grindex.htm

--------BladeRunner.

11-23-2001 Over year old.

T Koffler
Heliman
Location: Cayuga, NY

BladeRunner,
I don't know how you found that one, but it is great! Very informative.....

Thanks

11-23-2001 Over year old.

Augusto
rrAdvertiser
Location: San Diego, CA

Thanks Blade

Avant Aurora Ultimate

11-23-2001 Over year old.

BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

Greaser?

My pleasure guys.

----BladeRunner.

11-23-2001 Over year old.

Steve Campbell
Elite Veteran
Location: Baton Rouge, LA

<<...turn the plunger over and use the flat side.>>

C'mon, Brian; it CAN'T be that easy- can it???

You won't have the O-ring seal that way; I would guess that this might be rather messy, but enough gets up into the part to suffice?

Steve

11-23-2001 Over year old.

T Koffler
Heliman
Location: Cayuga, NY

You guys are always thinking......... O-ring, shmo-ring. I would have never thought of that till I had grease all over the bench

I'm going flying

. "See" you all later.....Maybe there will be more replies when I get back......

11-23-2001 Over year old.

BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

Greaser?

Bench? What bench? You mean you don't do those jobs at the dining room table-like I do? Man, have I got a lot to learn!

----------BladeRunner.

Isn't it strange how things work? If I really did that anywhere in HER part of the house-I really would be single, just like I was when I DID use the dining room table

hehehe---------BladeRunner.

11-23-2001 Over year old.

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Main Discussion > Any way to grease main bearings?

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