 Rear Wheel Bearing Difference, Comparison that may have caused my failures |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| 914Sixer |
 Jan 15 2017, 03:50 PM
Post
#1
|
|
914 Guru  Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
 |
For months now I have maintained there is a big difference in the quality of the new rear bearings verses the original ones. Today I had time to compare an original FAG (Germany)and a new SKF (Italy) bearing shells. MY conclusion is what I suspected, the new ones are NOT the same. I took pictures and measurements to document what I saw. I hope the pictures let you see the difference. Guess which one is the original German one!
Attached image(s)             
|
   |
 
|
  |
Replies
| jd74914 |
Jan 17 2017, 12:57 PM
Post
#2
|
|
Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
Interesting. It looks like they are trying to save some material cost in the races.
Do they have the same number of balls? If they do I would expect the newer ones to be stronger given larger balls. What's the failure mechanism? I assume people notice slop, but are the balls or races failing? Perhaps there is some surface hardness issue? Or a preload mismatch? Do Boxsters have the same loading a 914's? I feel like grease shouldn't be an issue since they are pre-greased and the fact that the bearing world should have a pretty good handle on greases... |
|
|
|
| worn |
Jan 17 2017, 05:28 PM
Post
#3
|
|
can't remember Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest
|
QUOTE(jd74914 @ Jan 17 2017, 10:57 AM)  I would expect the newer ones to be stronger given larger balls. Yeah - the young get all the credit in this country... |
|
|
|
Posts in this topic
914Sixer Rear Wheel Bearing Difference Jan 15 2017, 03:50 PM
Krieger I am new to this discussion, but may be a victim. ... Jan 15 2017, 06:35 PM
ConeDodger
I am new to this discussion, but may be a victim.... Jan 15 2017, 08:08 PM Perry Kiehl I wonder what the age cut off for these are. I... Jan 15 2017, 07:26 PM 6freak
I wonder what the age cut off for these are. I... Jan 18 2017, 09:04 AM 914_teener
I wonder what the age cut off for these are. I... Jan 18 2017, 01:10 PM 6freak
[quote name='6freak' post='2445144' date='Jan 18 ... Jan 18 2017, 04:24 PM 914_teener
[quote name='6freak' post='2445144' date='Jan 18... Jan 18 2017, 08:18 PM Krieger The Boxster is about 800lbs heavier too. About 20... Jan 15 2017, 08:36 PM 914Sixer Yes, the Boxster bearing is the same item. The SK... Jan 15 2017, 09:57 PM mbseto And those Boxster guys know how to pick a bearing.... Jan 16 2017, 09:01 AM falcor75 Just as a heads up. I live in Sweden and have a fr... Jan 16 2017, 01:22 PM altitude411
Just as a heads up. I live in Sweden and have a f... Jan 17 2017, 12:43 PM JoeDees
Just as a heads up. I live in Sweden and have a f... Jan 18 2017, 09:45 AM Krieger Mats. Thank you for this information. Crappy to ... Jan 16 2017, 01:28 PM 914Sixer Sloppy bearing after installation. Varying degree... Jan 17 2017, 07:31 PM 914_teener
Sloppy bearing after installation. Varying degre... Jan 17 2017, 08:38 PM jd74914
Bigger and less balls does not equal stronger bea... Jan 18 2017, 06:54 AM mb911 I am surprised no one has turned this into a cotta... Jan 17 2017, 09:21 PM SixerJ Does anyone know the old FAG part number and dims ... Jan 18 2017, 11:56 AM mepstein Bearings have a shelf life due to the grease aging... Jan 18 2017, 09:05 PM 6freak storage
The conditions under which bearings and ... Jan 19 2017, 08:18 AM mepstein What's funny is once the bearing is in our car... Jan 19 2017, 11:58 AM 914_teener
What's funny is once the bearing is in our ca... Jan 19 2017, 12:11 PM 6freak
What's funny is once the bearing is in our ca... Jan 19 2017, 03:29 PM 914Sixer See tygaboys post. His picture of the bearing all... Jan 19 2017, 08:29 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th May 2024 - 04:06 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.