Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-20-2009, 11:03 AM   #1
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,814
Images: 12
Bearing slip

It is clear that the inner race of both bearings move on the spindle at some point in time. My question is when and why?

This clearly can not happen on a pressed on bearing but why does it happen on a slip on bearing? You would think the load on te race would hold it in place.
__________________

__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 07-20-2009, 11:34 AM   #2
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
The bearing race is pressed on the spindle and should not spin.
If the wheel bearings have been re-packed and the bearings re-installed on the wrong race that COULD cause your problem. Bearings should ALWAYS be re-installed on the race they came off of.

To be safe dis-assemble and re-pack one at a time...old school.
__________________

__________________
PFC.....

ďAfter all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.Ē
RLC

Sandra wanted to go to Cleveland on vacation,
but Iím the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 07-20-2009, 11:37 AM   #3
2 Rivet Member
 
1988 32' Excella
West Palm Beach , Florida
Join Date: Jul 2008
Posts: 21
Images: 5
Question

I've owned three trailers and had the same happen on all at one time or another. It's a good question?
__________________
2dogtraveler is offline   Reply With Quote
Old 07-20-2009, 11:49 AM   #4
2 Rivet Member
 
1988 32' Excella
West Palm Beach , Florida
Join Date: Jul 2008
Posts: 21
Images: 5
Are we talk apples and oranges? The race is pressed into the hub and is not moving. It's the inner part of the bearing moving on the spindle.
__________________
2dogtraveler is offline   Reply With Quote
Old 07-20-2009, 12:27 PM   #5
Tramp Streamer
Commercial Member
 
ArtStream's Avatar
 
1995 28' Excella
Artist , at Large
Join Date: May 2004
Posts: 2,002
Images: 65
Blog Entries: 1
Quote:
Originally Posted by 2dogtraveler View Post
Are we talk apples and oranges? The race is pressed into the hub and is not moving. It's the inner part of the bearing moving on the spindle.
"That would be the inner race"
ArtStream is offline   Reply With Quote
Old 07-20-2009, 12:42 PM   #6
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Quote:
Originally Posted by ArtStream View Post
"That would be the inner race"
Yep inner...my oversight.

But assembly is the same, match bearing and race.
__________________
PFC.....

ďAfter all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.Ē
RLC

Sandra wanted to go to Cleveland on vacation,
but Iím the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 07-20-2009, 02:00 PM   #7
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,814
Images: 12
Let me clear things up a bit.

The INNER RACE of a slip on bearing is what I am referring to and yes they do turn on the spindle. My question is why?

As noted above with a pressed on bearing on shaft this would not happen.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 07-20-2009, 02:49 PM   #8
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Howie,
I am not familiar with a press on inner bearing. How would you install the inner seal?

Both races are pressed into the hub. The inner bearing should slide snugly over the greased spindle, it is kept from turning by the bearing preload. The spindle should be replaced if scored badly, or the bearing is too loose. If an inner bearing overheats it can get "welded" on the spindle and will pull apart when the wheel is removed.
__________________
PFC.....

ďAfter all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.Ē
RLC

Sandra wanted to go to Cleveland on vacation,
but Iím the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 07-20-2009, 03:21 PM   #9
Rivet Master
 
Aerowood's Avatar

 
1971 21' Globetrotter
Arvada , Colorado
Join Date: May 2006
Posts: 2,841
If the bearings are pressed on, the the preload of the bearings would have to be adjusted with either a crush spacer or shims. With the slip fit the preload can be set with the retainer nut and then cotter keyed.

Kip
__________________
Aerowood is offline   Reply With Quote
Old 07-20-2009, 03:45 PM   #10
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,814
Images: 12
There are 2 type of roller bearing. Those that press on a shaft and the bearing in turn are pressed into a frame, both races are fixed and slip on bearing like those used on trailer axles, only the outer race is constrained.

With a slip on bearing the inner race is free to turn on the spindle. There is evidence that the inner race does turn on the spindle at some time. My question is under what circumstances does the inner race move? I have always greased the spindle when install the bearing. Even being greased one would think the preload would keep the inner race from moving against the spindle but that is not the case.

If you look at the inner side of the thrust washer you will see a polished ring indicating the race has turned against the washer. Like wise if you look at the underside of the spindle at both the inner and outer bearing you will see evidence the inner race has moved against the spindle.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 07-20-2009, 04:50 PM   #11
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Ok.... I think we have a failure to communicate...

bearing cup=race


http://k0swi.microlnk.com/2BUYRIGHT/...20DIAGRAMS.htm
__________________
PFC.....

ďAfter all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.Ē
RLC

Sandra wanted to go to Cleveland on vacation,
but Iím the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 07-20-2009, 07:10 PM   #12
Rivet Master
 
Wingeezer's Avatar
 
2005 30' Classic
Burlington , Ontario
Join Date: Sep 2008
Posts: 2,709
Quote:
Originally Posted by HowieE View Post
There are 2 type of roller bearing. Those that press on a shaft and the bearing in turn are pressed into a frame, both races are fixed and slip on bearing like those used on trailer axles, only the outer race is constrained.

With a slip on bearing the inner race is free to turn on the spindle. There is evidence that the inner race does turn on the spindle at some time. My question is under what circumstances does the inner race move? I have always greased the spindle when install the bearing. Even being greased one would think the preload would keep the inner race from moving against the spindle but that is not the case.

If you look at the inner side of the thrust washer you will see a polished ring indicating the race has turned against the washer. Like wise if you look at the underside of the spindle at both the inner and outer bearing you will see evidence the inner race has moved against the spindle.


Could it not be that an inner race just has a tendency to slowly creep on the spindle due to drag of the rollers as they roll around at at high speeds?

Brian
__________________
Brian & Connie Mitchell

2005 Classic 30'
Hensley Arrow / Centramatics
2008 GMC Sierra SLT 2500HD,4x4,Crew Cab, Diesel, Leer cap.
Wingeezer is offline   Reply With Quote
Old 07-20-2009, 08:11 PM   #13
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,814
Images: 12
Quote:
Originally Posted by Wingeezer View Post
Could it not be that an inner race just has a tendency to slowly creep on the spindle due to drag of the rollers as they roll around at at high speeds?

Brian
That's the best explanation I have heard yet, but the markings seam to be more that a slow creep would produce. There was heat present because of discoloration on the bottom of the spindle and inside the inner race. Not enough to warrant replacing the bearing but enough to cause someone with terminal tinkeritise to ask a question.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 07-20-2009, 09:19 PM   #14
Rivet Master
 
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
Join Date: Jul 2005
Posts: 2,941
You should not be preloading the bearings. The specification is to have them with 0.001 to 0.005 inch end play. That translates to just a feel of just the tiniest motion if you rock the wheel perpendicular to the axle. That means you bring them up snug by hand and back them off to the next notch. The inter races are fairly snug (0.002 - 0.005 loose) but should be able to turn. There should be no heat build up because they do not turn that fast and there should be less that 150F temperature build up due to friction at high speeds on the road from supporting the trailer. Discoloring does not occur below 400F. Blue color does not develop until over 600F. If you have any discoloring you have done something wrong and way over tightened the bearing.
__________________

__________________
dwightdi is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Slimp Dolly JimGolden Hitches, Couplers & Balls 13 06-21-2009 03:38 PM
Limited slip axle - must have? cbgenrich Tow Vehicles 88 03-07-2009 08:26 AM
Bearing scare wingfoot321 Axles 10 10-25-2007 09:57 PM
Slip Fitting On Top Of Black Tank To Toilet Radman Sinks, Showers & Toilets 3 05-02-2007 04:11 PM
replace bearing? michaelsessa Axles 5 04-27-2007 01:54 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:48 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.