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HelicopterMain Discussion › thrust bearing grease
10-19-2015 10:00 AM  26 months agoPost 1
tomtek

rrApprentice

ga

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What type of grease do I look for to grease the thrust bearings in the main blade arm and where would I go locally to purchase it. Thank you.

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10-19-2015 10:44 AM  26 months agoPost 2
oballzz

rrNovice

lilburn ga usa

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silicone grease,http://www.napaonline.com/Catalog/C...1346_0361061266

Music is probably the only real magic I have encountered in my life,it's pure and it's real,it moves,it heals..TP

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10-19-2015 10:51 AM  26 months agoPost 3
Richardmid1

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Leeds, England

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Any bearing grease.

60% of the time, it works every time!

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10-19-2015 11:51 AM  26 months agoPost 4
HeimD

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the great southwest

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Tri-flow synthetic grease. Excellent stuff.

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10-19-2015 12:19 PM  26 months agoPost 5
tomtek

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ga

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Where can I find a local major store that carries this

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10-19-2015 01:06 PM  26 months agoPost 6
allns47

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Richmond IN.

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autozone,,,its call dieelectric grease pure silicone,,,its about 5 bucks for a big tube of it

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10-19-2015 01:24 PM  26 months agoPost 7
jharkin

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Holliston, MA - USA

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Dielectric grease is made for sealing water out of electrical contacts in cars. Different application than bearings.

Second the recommendation above for Tri-Flow. you can get it on amazon and at some hobby dealers like Helidirect. If you can find that go to the auto parts and get a high quality bearing grease like Mobil 1 synthetic grease. Its purple/red colored and comes in a big silver tub.

-Jeremy
Whiplash-G
Helix 700G
T-Rex 450 fbl conversion
alot of planks

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10-19-2015 02:23 PM  26 months agoPost 8
tomtek

rrApprentice

ga

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Thank you all

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10-19-2015 02:37 PM  26 months agoPost 9
JEEPWORLD2002/2

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Blue Bell, Pa

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here is what i rec. its use in sealed joint for auto. its use in marine applications . also used in automation sliders& rails. great stuff

Mobilgrease XHPâ„¢ 222

http://www.mobilindustrial.com/ind/...rease&WT.srch=1

here is another one
RONEX MP is a multi-purpose grease recommended by ExxonMobil for both industrial and automotive applications such as:

Industrial - Plain and rolling element bearings, gears
Automotive – Light Truck, Bus and Construction applications requiring an NLGI GC-LB qualified grease such as:
o Wheel Bearings
o Ball Joints
o Chassis lubrication points

Trex600n,Trex500,MR25,MikadoLoGo5003d/KDE,Goblin 380XNova,CastleCreations,Ys,JR XG8,Tags Mini XBus Dmss//FAA# FA3NYC9TAP

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10-19-2015 03:50 PM  26 months agoPost 10
allns47

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Richmond IN.

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die electric grease is fine for this application..

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10-19-2015 04:12 PM  26 months agoPost 11
JEEPWORLD2002/2

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Blue Bell, Pa

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problem with silicone in our application is rpms, thats why you see it oze out. with grease ive selected its sticky and will remain on the surfaces for months vs having to reapply. i use mine for all bearings except the one way which i use silicone or syn dextron (autotransfluid) i bought the little greaser and load them up when building my kits and its a once and done till about 150 flight and i ve never have a single race rust, pit and i attribute that to the grease. i try and use all good bearings but i do own 2 align kits with ?able bearings which are still going great except a few mains from crashes. for 10$ u get a tube or a pal and it will last long long time

Trex600n,Trex500,MR25,MikadoLoGo5003d/KDE,Goblin 380XNova,CastleCreations,Ys,JR XG8,Tags Mini XBus Dmss//FAA# FA3NYC9TAP

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10-19-2015 07:30 PM  26 months agoPost 12
Dr.Ben

rrMaster

Richmond, VA, USA

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Plain silicone grease really is inadequate for thrust races. You want a task designed high pressure rated bearing lubricant that is also as sticky as possible to help it stay put under centripetal force.

Though there are lots of good choices, I have had good results with Red and Tacky from Advance Auto and Synergy Botolube.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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10-19-2015 08:58 PM  26 months agoPost 13
AWittleWabbit

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O.C., CA

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I use Mobil33 or Aeroshell33 on thrust bearings. For dampers, I've been using silicone or dielectric grease.

I second what The Dr says about having a grease that stays put. Any excess of Mobil33 gets slung out but there's enough left in the thrust bearings after 100 flights, at least on my 450.

Heli-itis sufferer.

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10-20-2015 12:41 AM  26 months agoPost 14
mr dan

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Stockton Calif

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White lithium grease works great for thrust bearings.

"R.I.P Roman" Citizen 0094 in the Nation

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10-20-2015 09:33 AM  26 months agoPost 15
wjvail

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Meridian, Mississippi

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At times in my life I have found myself wondering if greasing head grip thrust bearings really helps at all.

Given the load put on the thrust bearing by a 240 gram 720mm blade at 2,000 rpm, and given the fact the bearing doesn't rotate but instead just scrubs back and forth, all the while rotational forces working to remove grease from where it is needed, I have found myself wondering if the bearings would function just as well with a light coating of oil to keep them from rusting.

If you put yourself at the infinitesimally small point where a ball meets the race, does a spot of grease really matter? After a few flights is there actually any grease preventing metal to metal?

Take a thrust bearing, put it on the ground, put your heal on it, and stand on it. Now rotate back and forth 10 degrees for a few hours - all the while with an air hose blowing on the bearing. Does the lubricant you started with really matter?*

Still, I clean and grease them semi-regularly. Why not, right?

Just a thought.

Bill

* A short side note: A 240 gram blade, with a center of mass 500mm from the main mast, turning 2,000 rpm, will generate about 1,200 pounds of force on the thrust bearing. If your thrust bearing has six balls, each individual ball is supporting the weight of a 200 pound man.
http://www.calctool.org/CALC/phys/newtonian/centrifugal

"Well, Nothing bad can happen now."

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10-20-2015 01:05 PM  26 months agoPost 16
allns47

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Richmond IN.

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just took apart head last night to replace spindle shaft,,,,last time I greased thrust bearings was at least 6 gallons ago,,,silicone grease was still all inside of the thrust bearings

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10-20-2015 01:26 PM  26 months agoPost 17
gmcullan

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Southbridge, MA

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I have to confess. I do not grease my thrust bearings. I use a high viscosity synthetic lubricant during assembly, but that's only to hold things together during assembly. Flying helis exclusively since 2000, I have found no benefit to using grease nor have I found any detriment to not using grease.

My personal opinion? Grease if you want to, but don't feel guilty if you don't.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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10-20-2015 06:13 PM  26 months agoPost 18
AWittleWabbit

rrElite Veteran

O.C., CA

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One thing guys, remember grease is a reservoir for lubricant! The grease is not really there to be the lubricant. The oil wicks out of the grease and keeps things coated with a thin coat of oil. Think of servos, the grease gets slung off the faster turning gears. But you'll notice oil on occasion oil wicks out of the case.

It's kind of counterintuitive, I only know this be because I asked an insanely smart coworker why he's slathering grease inside a housing and not just the gears that went in there. That grease is a reservoir for lubricant was his response.

Given the various methods presented, I assume there's a lot of margin in these little buggers.

Heli-itis sufferer.

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10-21-2015 12:12 AM  26 months agoPost 19
bigdog714

rrVeteran

Rochester, MN U.S.A.

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All kinds of cool info!

I use Tri Flow Red, my meter is usually what I find on my blade grips after flight! Their clean, the grease is staying put! LOL!

It was a number of years ago, I was involved in finding a solution for a consistent, pre-loaded, heavy weight / high friction bearing failure at a cost of $900 a piece, two per application.

In my research I discovered from Lubricant manufactures that the bench mark for grease durability or stick ability as it were is based on stringiness. Put the grease on your thumb and fore finger and simple pull apart and touch repeatedly and observe the stringiness. There are of course other factors such as heat, application conditions and so forth. Basically stringy means it stays where you put it.

The other product I researched was additives, STP being the best. If you put STP on your finger tips and try to press them together, it cant be done.

I ended up mixing the two product together, the life went from about a month too at least a year and beyond. These were friction drive thrust rollers for an asphalt dryer weighing 45 tons empty, with a 129,000,000btu natural gas burner providing the heat. Pretty extreme conditions!

MD 800
Logo 600SE
Logo 14/500 Carbon
Ballistic 700
HD 500V2
Hirobo 50E
Avant 90E

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10-21-2015 02:24 PM  26 months agoPost 20
HeimD

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the great southwest

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White lithium grease works great for thrust bearings.
I used to use that, but I found it dries out and gets "cakey" rather quickly.

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HelicopterMain Discussion › thrust bearing grease
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