porsches996

Hello folks...,

Just out of curiosity...

Is one of you ever measured the rear wheel bearing...I would like to get the size width and bore of the bearing.

I would really like to get the spec of this rear bearing.
I would also like to get the front wheel bearing specs if you have it.
Thanks in advance

Robert

Macster

Dimensions of the bearings can be obtained from measuring examples of each bearing.

Or, my memory is a bit fuzzy but IIRC bearing specs are given in some SAE documentation or perhaps in the Machinery's Handbook in the ball/roller bearing sections.

Yes, just flipped open my Machinery's Handbook and in the Ball and Roller Bearings section there are pages of tables listing the various dimensioned features of the various styles of ball and roller bearings and their tolerances for a given class.

I have an old Boxster rear wheel bearing on my desk (paperweight) and I see some numbers that if one had access to the bearing maker's site might be used to look up the bearing's specifications, whatever they are.

FWIW, the bearing is made in Germany, by ***.

The bearing model number (?): 8 (or maybe B) 05355.

Additional markings: ++T-B

Sincerely,

Macster.

porsches996

Thanks Macster...,

Today i went to the Porsche dealer and measure by myself the rear wheel bearing...

Size is 85mm
Width is 37mm
Bore is 47mm

Thanks

Robert

ivangene

are you trying to source a cheap replacement rather then buy from Porsche (other) parts

porsches996

Where i'm living the bearing cost more then $160.00... including taxes.

Just for a simple bearing it is hard to believe to pay that much.i can get 2 front bearing for my car for $50.00 and they are just a bit smaller...

For no reason and i don't know why sometimes i like to deal a little thing like that and ready to pay a thousand box for something that usually doesn't worth it at all...search why...

I finally found a renown places selling it at $97.00...
Bye Bye

Robert

Macster

While I no longer have access to precision measuring tools (packed up and stored somewhere at the house) I happen to have a nice Browne and Sharpe dial caliber handy (in a desk drawer).

BTW, in the shop we used to refer to a dial caliber a 'guessing stick'.

FWIWs, my old Boxster's rear wheel bearing is:

OD = 2.955" (75.057mm)
WIDTH = 1.457" (37.007mm)
ID = 1.652" (41.960mm)

You realize of course the actual OD and ID dimensions are critical down to probably 3 or 4 places to the right of the decimal point?

Too large an OD and the bearing's press fit is too tight and the bearing can run hot and suffer premature failure. Too small an OD and the bearing can spin in the hub housing. Much the same goes for the ID diameter.

Sincerely,

Macster.

CWhaley

You are better off getting the bearing number off the bearing and using that to cross reference it with another source... Many of the 996/997 bearings are the same as some of the BMW bearings.... which can be cheaper to purchase.

nick49

I believe these are proprietary and made specifically for Porsche. As I recall when I was pressing a hub out of the bearing on aTT wheel carrier, the bearing set is actually 2 ball bearings that are sealed sharing a common outer race. If not installed properly with the right components supported during the pressing operation, the new bearing will be destroyed.

CWhaley

They are not a Porsche only bearing... I know for a fact that if you order bearings for the P-car from Vertex you will be getting a BMW sourced bearing.

ivangene

I bought Jeep bearings for about 20% of Jeep price at a bearing house... he asked "are these for a car" I said Nope.... and off I went, had no issues with them (but then again a 71' CJ5 has a top end of about 60)