Help regarding spindle dimensions (85.5) - Rennlist - Porsche Discussion Forums

Notices
924/931/944/951/968 Forum
Sponsored by:
Sponsored by:

Help regarding spindle dimensions (85.5)

Old 10-10-2018, 10:26 PM
  #1  
Noahs944
Addict
Rennlist Member
Thread Starter
 
Noahs944's Avatar
 
Join Date: May 2013
Location: Calgary, Alberta, Canada
Posts: 2,944
Default Help regarding spindle dimensions (85.5)

My friend is having issues with his 87 944 and measures .003 less on one spindle than the other yet the finish is great & he's wondering if it's been machined down & is asking for specs. Any ideas? Thanks!
Noahs944 is offline  
Old 10-11-2018, 08:08 AM
  #2  
MAGK944
Addict
Rennlist Member
 
MAGK944's Avatar
 
Join Date: Jun 2007
Location: Palm Beach, Florida
Posts: 4,937
Default

Originally Posted by Noahs944 View Post
My friend is having issues with his 87 944 and measures .003 less on one spindle than the other yet the finish is great & he's wondering if it's been machined down & is asking for specs. Any ideas? Thanks!
What is he measuring?



MAGK944 is online now  
Old 10-11-2018, 09:02 AM
  #3  
Noahs944
Addict
Rennlist Member
Thread Starter
 
Noahs944's Avatar
 
Join Date: May 2013
Location: Calgary, Alberta, Canada
Posts: 2,944
Default

He's measuring where the bearing ride (he's concerned about bearings turning) I told him I haven't heard about it being a common occurrence with these cars, but maybe that is incorrect. THANK YOU MAGK944!
Noahs944 is offline  
Old 10-11-2018, 09:49 AM
  #4  
DT141Y
New User
 
Join Date: Oct 2018
Posts: 1
Default SPINDLE DIAMETER

I have a 1987 Porsche 944 NA. I bought it with spun bearings on the front spindles. Been looking for good spindles to install so I don't repeat the problem from when I bought it. Can't seem to find good ones.
I just received a pair of spindles last nite and I miked where the bearings mount. As an engineer and mechanic I know that the spindle should fit loose to the bearings by .0002 to .012 inches. The new bearings should arrive here in the next few days.
But I have an old spindle that I had bought and it too had spun bearings. I miked that one as well. I think all these spindles are worn out, and all had spun bearings at one time. Some look better than others. I think they are between .002 and .003 loose.
If I use any of these, the bearings are going to spin again. That is what happens when the fit is too loose. So I am wondering if anybody knows what the dimension limits are from Porsche. 22 mm or 35 mm does not help. I need the minimum and maximum dimensions permissable
from Porsche. I also emailed Porsche, but no response yet. On the left spindle I get .8406-.8422, and the large brg is 1.3747-1.3746. On the right .8426-.8428 and 1.3756-1.3751. The other one I already had that had spun is .8436 and 1.3770.

Thanks for your help
DT141Y is offline  
Old 10-11-2018, 10:53 AM
  #5  
MAGK944
Addict
Rennlist Member
 
MAGK944's Avatar
 
Join Date: Jun 2007
Location: Palm Beach, Florida
Posts: 4,937
Default

I would think that you would have a better chance of getting tolerance information like that from the actual bearing manufacturer rather than from Porsche. For every bearing there must be a tolerance on the inner and outer diameter that they will fit without spinning. If yours are worn you can buy new spindles from Porsche, I did last year for one of my cars for the same reason. I couldnĺt figure for a long while why my left front hub/rotor assembly always gave off a burning/hot smell and the right didnĺt. I turned the relatively new rotor and replaced the bearings and hub before I realized it was the spindle. You are likely right that any used ones are not going to provide a long service life or may be initially too worn, after all we are talking 30+ yo parts. Sometimes you have to bite the bullet and buy new.
MAGK944 is online now  
Old 10-11-2018, 11:06 AM
  #6  
tempest411
Addict
Rennlist Member
 
tempest411's Avatar
 
Join Date: Aug 2012
Location: Discovery Bay, CA
Posts: 664
Default

That could be one of those very rare times where I'd try JB Weld. If all it has to do is act as a spacer I think it'd be perfect. If it doesn't work you could break the stuff off easy enough.
tempest411 is offline  


Thread Tools
Search this Thread

Contact Us Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: