Fun, Learning, Friendship and Mutual Respect START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Mikado Logo Helicopters


Mikado Logo Helicopters Mikado Logo Helicopters Discussion


Like Tree6Likes
  • 1 Post By gmann
  • 1 Post By racer-g
  • 1 Post By gmann
  • 1 Post By gmann
  • 1 Post By senzafine
  • 1 Post By Mr.Andersen
Reply
 
LinkBack Thread Tools Display Modes
Old 04-05-2019, 04:40 PM   #1 (permalink)
Registered Users
 

Join Date: Sep 2014
Default 550sx head thrust bearings shot

Well, something funny was going in my my 550SX head, so took apart to discover both thrust beatings totally eaten up and disintegrating
Yes they were lubed. This happen to anyone else?
Hundreds of flights over a couple years.

I'm going to order part #2349
https://shop.mikadousa.com/02349-Thr...4x5_p_139.html

What about these instead?? (same size)
https://www.bocabearings.com/products/f6-14g-302

I'd rather not have this issue happen again...
Thanks.
Attached Thumbnails
Click image for larger version

Name:	P4050558.jpg
Views:	84
Size:	105.7 KB
ID:	786317  
gmann is offline        Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-05-2019, 06:21 PM   #2 (permalink)
Registered Users
 
Posts: 5,685
 

Join Date: Apr 2016
Default

Hundreds of flights? . Not seeing the issue. Normal wear.
Thickfog is online now        Reply With Quote Quick reply to this message
Old 04-05-2019, 06:29 PM   #3 (permalink)
Registered Users
 
Posts: 2,428
 
My HF Map location
Join Date: Apr 2008
Default

They don't last that long and lube never stays in there. I rebuild the head more than anything else on my machines. When there even a little notchy I can see boom supports shaking more on hard cyclic than with good bearings.
__________________
Wayne Armstrong

Logo 480 / Logo 600sx / Logo 690 / Logo 700 / Vbar Control
Mentalic is offline        Reply With Quote Quick reply to this message
Old 04-05-2019, 07:45 PM   #4 (permalink)
Registered Users
 

Join Date: Dec 2014
Location: always windy on the east coast
Default

yup, no grease.
it takes time to do that.. it didn't happen all of the sudden..
__________________
a bunch of helis... now all vcontrol and neo..finally :lol
tonys-heli is online now        Reply With Quote Quick reply to this message
Old 04-05-2019, 08:06 PM   #5 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Sep 2014
Default

Thanks guys. Will keep an eye on this and inspect more often...
senzafine likes this.
gmann is offline        Reply With Quote Quick reply to this message
Old 04-07-2019, 09:52 PM   #6 (permalink)
Registered Users
 

Join Date: Oct 2016
Default

I assume you have installed thrusts with separator facing outside.
the better way to install it opposite way so the balls dont run over the separator and wear it.
It was a topic about it but i cant find the link.

Quick search.
In picture is wrong installation.
Attached Thumbnails
Click image for larger version

Name:	t.JPG
Views:	65
Size:	17.4 KB
ID:	786701  

Last edited by racer-g; 04-07-2019 at 10:38 PM..
racer-g is offline        Reply With Quote Quick reply to this message
Old 04-07-2019, 10:22 PM   #7 (permalink)
Registered Users
 

Join Date: Oct 2016
Default

This is correct installation.
And dont worry about catching the grease.It will throw away once you spool up anyway
Attached Thumbnails
Click image for larger version

Name:	q.JPG
Views:	66
Size:	25.5 KB
ID:	786703  
racer-g is offline        Reply With Quote Quick reply to this message
Old 04-07-2019, 11:27 PM   #8 (permalink)
Registered Users
 

Join Date: Aug 2018
Location: Beautiful Vancouver, WA
Default

Every Align and Tarot manual shows bearing retainer with flat side outboard, to retain grease.

Please enlighten on reversal. Less wear on cups? Not sure I can see that. Appears to me that retainer floats between the cups.



Thanks

Dave
dwoof is offline        Reply With Quote Quick reply to this message
Old 04-07-2019, 11:43 PM   #9 (permalink)
Registered Users
 
Posts: 1,630
 

Join Date: Mar 2011
Default

I got the same thing. It's the Logo 600SX with about 200 flights and have not opened the head since the 1st day.
I will open and re-apply the grease to thrust bearings every 50 flights


Last edited by ddhuans; 04-08-2019 at 12:02 AM..
ddhuans is offline        Reply With Quote Quick reply to this message
Old 04-07-2019, 11:54 PM   #10 (permalink)
Registered Users
 

Join Date: Oct 2016
Default

Quote:
Originally Posted by dwoof View Post
Every Align and Tarot manual shows bearing retainer with flat side outboard, to retain grease.
But this is Mikado Logo
PS
Also,wearenes depends on headspeed.
racer-g is offline        Reply With Quote Quick reply to this message
Old 04-08-2019, 12:19 AM   #11 (permalink)
Registered Users
 
Posts: 1,630
 

Join Date: Mar 2011
Default

Quote:
Originally Posted by racer-g View Post
But this is Mikado Logo
PS
Also,wearenes depends on headspeed.
Quote:
Originally Posted by racer-g View Post
This is correct installation.
And dont worry about catching the grease.It will throw away once you spool up anyway

No,you're wrong.
ddhuans is offline        Reply With Quote Quick reply to this message
Old 04-08-2019, 01:26 AM   #12 (permalink)
Registered Users
 

Join Date: Oct 2016
Default

It says that mounting direction is not critical(so neither you are right ) but we all know that mikado manuals are not perfect.
Besides, they are not updating manuals and some of them contain minor mistakes like shimming main gear or pinion but thats another topic.
You can assemble thrusts the way you want but my, and others experience show that it needs to be assembled the way i showed on picture.
Here is old thread on vstabi forum.
They discussing logo xtreme but the idea is the same for all thrusts we use in our models.
https://www.vstabi.info/forum/read.php?39,95609
So...do a quick search before blaming someone he is wrong...

PS

Read also MrMel's opinion
https://www.helifreak.com/showthread...st#post3874765
STAZZ likes this.

Last edited by racer-g; 04-08-2019 at 01:43 AM..
racer-g is offline        Reply With Quote Quick reply to this message
Old 04-08-2019, 09:27 AM   #13 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Sep 2014
Default

Quote:
Every Align and Tarot manual shows bearing retainer with flat side outboard, to retain grease.
Quote:
I have always put my Thrust Bearings in with the exposed balls facing in (Towards the Shaft)
Me too on all models. Correct the manual says "mounting direction not critical" - well, their manual leaves a lot to be desired...

And thanks for the pic of Logo 600 bearings. Mine are totally eaten away...
taoY likes this.
gmann is offline        Reply With Quote Quick reply to this message
Old 04-08-2019, 12:00 PM   #14 (permalink)
Registered Users
 

Join Date: Dec 2014
Location: always windy on the east coast
Default

if your bearings are bad in the head, I wonder what your tail thrust bearings look like.
__________________
a bunch of helis... now all vcontrol and neo..finally :lol
tonys-heli is online now        Reply With Quote Quick reply to this message
Old 04-08-2019, 12:18 PM   #15 (permalink)
Registered Users
 
Posts: 227
 

Join Date: Sep 2016
Default

this post made me want to check my tail thrust bearings and they were both quite rusty & not good looking. I was having weird tail behavior and im almost sure it was that.
__________________
OXY 5 | OXY 2
LYNX | AccuRC | Scorpion | Xpert
xcellfury is online now        Reply With Quote Quick reply to this message
Old 04-08-2019, 02:41 PM   #16 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Sep 2014
Default

You're right Tony - I pulled the tail apart the same day and they were fine, just a little rusty - cleaned up and relubed.
tonys-heli likes this.
gmann is offline        Reply With Quote Quick reply to this message
Old 04-08-2019, 02:52 PM   #17 (permalink)
Registered Users
 
Posts: 847
 

Join Date: Oct 2006
Location: Colorado
Default

I also prefer to put my thrust washers with the bracket in vs out. I use Botolube and I am amazed that most of the time when I tear it down every 6 months or so there is still some on the balls. Anytime any head bearings get notchy or im in doubt I replace them. I've had some weird shakes and shimmies over the years and it's just not worth it to me to save a few bucks.
tonys-heli likes this.
__________________
Mile high fun - https://rcheli.club/
senzafine is offline        Reply With Quote Quick reply to this message
Old 04-08-2019, 03:57 PM   #18 (permalink)
Registered Users
 
Posts: 227
 

Join Date: Sep 2016
Default

Quote:
Originally Posted by gmann View Post
You're right Tony - I pulled the tail apart the same day and they were fine, just a little rusty - cleaned up and relubed.
I did the exact same thing but found my grips with a bit of play so I replaced them & its good & smooth now
__________________
OXY 5 | OXY 2
LYNX | AccuRC | Scorpion | Xpert
xcellfury is online now        Reply With Quote Quick reply to this message
Old 04-14-2019, 02:56 PM   #19 (permalink)
Registered Users
 
Posts: 4,960
 

Join Date: Jun 2008
Location: Trondheim Norway
Default

Quote:
Originally Posted by racer-g View Post
I assume you have installed thrusts with separator facing outside.
the better way to install it opposite way so the balls dont run over the separator and wear it.
It was a topic about it but i cant find the link.

Quick search.
In picture is wrong installation.
Im in the process of changing out the thrust bearings of my 600SX and mounted them separator facing inwards when mounting them last time and now the only wear is on the balls and races and there where remarkable amounts of grease there to considering the race not holding onto the grease mounted these way.

Just saying.
racer-g likes this.
__________________
Logo 600SX
Warp 360
Chase 360
Exo 500
Mr.Andersen is offline        Reply With Quote Quick reply to this message
Reply




Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the HeliFreak forums, you must first register.
Please enter your desired user name, your REAL and WORKING email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself. Use a real email address or you will not be granted access to the site. Thank you.
Email Address:
Location
Where do you live? ie: Country, State, City or General Geographic Location please.
Name and Lastname
Enter name and last name here. (This information is not shown to the general public. Optional)
Helicopter #1
Enter Helicopter #1 type and equipment.
Helicopter #2
Enter Helicopter #2 type and equipment.
Helicopter #3
Enter Helicopter #3 type and equipment.
Helicopter #4
Enter Helicopter #4 type and equipment.

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




Copyright © Website Acquisitions Inc. All rights reserved.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

SEO by vBSEO 3.6.1