Driveshaft intermediate bearing

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Re: Driveshaft intermediate bearing

Postby Simon_P » Thu 19.10.2017, 02:02

No - normal clearance CN is not marked. C3 is increased clearance.

My error was to write that C2 was normal clearance and it is not.
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Re: Driveshaft intermediate bearing

Postby Bern » Thu 19.10.2017, 09:55

Ok, thanks, got it now :-)

I think I'll get the proper bearing and change it again. I can get the driveshaft out quite easily and quickly now, the only thing that puts me off is having to top up the gearbox oil again :-(

Cheers,

Bern.
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Re: Driveshaft intermediate bearing

Postby Giniw » Tue 31.10.2017, 16:07

Hi,
I thought I had found a right side shaft (the right equivalent to https://www.sjsportscars.com/parts-and- ... R6007S.htm which is A100R6006S) on elise-shop BUT unfortunately although it was listed on http://www.elise-shop.com/a100r6006s-p-346005.html they just refunded me so ... Not available anymore there either.
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Re: Driveshaft intermediate bearing

Postby Bern » Wed 01.11.2017, 17:01

Ah, shame.

I tried to buy the complete intermediate shaft from them, but they refunded me also. Lucky really, because I didn't need it and the bearing was very reasonably priced and easy to fit (well, once I knew what I was doing).

I've now fitted the correct bearing on the shaft (standard clearance). The difference was noticeable on the bench, but hasn't made any difference to the way it drives.

Would anybody know if the CV joints are directional, would a left hand CV joint work on a right hand shaft? I may take apart my old left hand shaft and take a look. That SJ only list the left hand joint suggests that they are different. Obviously the tulip at the inboard end is different, but I'd imagine that the spiders are the same.
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Re: Driveshaft intermediate bearing

Postby Brit-Car-Nut » Wed 01.11.2017, 17:27

Bern wrote:Would anybody know if the CV joints are directional, would a left hand CV joint work on a right hand shaft? I may take apart my old left hand shaft and take a look. That SJ only list the left hand joint suggests that they are different. Obviously the tulip at the inboard end is different, but I'd imagine that the spiders are the same.

The outer CV Joints are the same part number (A100R6003S) so not directional.

Driveshafts.jpg
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Re: Driveshaft intermediate bearing

Postby Bern » Wed 01.11.2017, 20:52

Aha, that's brilliant - thanks :-)
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Re: Driveshaft intermediate bearing

Postby Giniw » Mon 26.11.2018, 19:00

I was about to order that bearing (at last :oops: :lol: ) but still a bit confused as whether I should buy a standard or C3:

Apparently a standard one is limited to 7500rpm (https://www.123roulement.com/roulement-6206-2RS-SKF.php and https://photo.123bearing.com/6206-2RS-S ... SKF-FR.jpg and http://www.skf.com/fr/products/bearings ... =6206-2RS1 ) so it's would be a bit short in high engine RPM in 5th gear?

On the other hand the C3 (higher clearance) is labelled as "high speed" so I gather it's capable of more than 7500 RPM, which seems better (not that it will be so often than the Elan is driven WOT in 5th, but ... ?)

And there is also this one which is labelled as high end bearing, whatever it means ... ?
https://www.123roulement.com/roulement- ... NG-SKF.php

Standard:
https://www.123roulement.com/roulement-6206-2RS-SKF.php

C3:
https://www.123roulement.com/roulement- ... C3-SKF.php


Internal clearance explanation:
http://www.skf.com/sg/products/bearings ... index.html
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Re: Driveshaft intermediate bearing

Postby Giniw » Mon 26.11.2018, 19:56

Apparently the limiting speed is really a ... err ... limiting speed that should not be exceeded so I suspect a 7500 rated one is not a so good idea:
http://www.skf.com/us/products/bearings ... index.html

The 62 external diameter and 16mm thickness filter allow to show the canditates here:
http://www.skf.com/us/products/bearings ... index.html
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Re: Driveshaft intermediate bearing

Postby Giniw » Mon 26.11.2018, 20:06

Apparently the 206-Z or 206-2Z would be better suited to our cars (http://www.skf.com/us/products/bearings ... index.html)
206-Z is rated at a limiting speed of 12000 RPM
206-2Z is rated at a limiting speed of 9600 RPM

but are equivalent for the others parameters, and as apparently the 206-Z is half the price I could be tempted to order that one ... (25€ + shipping https://www.123roulement.com/roulement-206-Z-SKF.php — interestingly the shipping could be about 5 euros whereas the much cheaper 6206 2RS is more like 10€ ... so it makes the 206 cheaper than just comparing the original prices ... Anyway!)

If really the original bearing is limited to 7500 RPM, that could explain why it is apparently prone to fail on the Elan?
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Re: Driveshaft intermediate bearing

Postby Giniw » Mon 26.11.2018, 20:34

Riiiight, after a few more reading, the 6206 is rated OK until 15000 RPM and is identical to the original 6206 2RS otherwise (which is only rated 7500 RPM)

6206 : http://www.skf.com/fr/products/bearings ... metricUnit
6206 2RS1 (original one apparently, see viewtopic.php?f=48&t=26163&start=60#p335406) http://www.skf.com/fr/products/bearings ... metricUnit

And it's still cheap (about 8€+5€ shipping) https://www.123roulement.com/roulement-6206-SKF.php
I think I am going to order the faster rating 6206.

EDIT : well actually no I won't, because 6206 has no seal!
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Re: Driveshaft intermediate bearing

Postby Giniw » Mon 26.11.2018, 21:51

206-2Z
9600 RPM (and higher overall ratings)
http://www.skf.com/fr/products/bearings ... metricUnit
https://www.123roulement.com/roulement-206-2Z-SKF.php 48.90€ free shipping with code PM35 => 48.90€

6206-2RZ
12 000 RPM seems nice BUT about 200€ so I think I will forget that one! :shock: :lol:
http://www.skf.com/fr/products/bearings ... metricUnit
https://www.123roulement.com/roulement- ... WT-SKF.php

W 6206-2Z (W is stainless steel)
12000
http://www.skf.com/fr/products/bearings ... metricUnit
https://www.123roulement.com/roulement-W6206-2Z-SKF.php 74€


But if I understand well, 206-2Z and W 6206-2Z are only dust sealed so unsuitable for the intermediate shaft.
So it would be either 6206-2RZ at 200€ each or 6206 2RS1 (possibly C3?) at 8€ each.
I think the 2RS1 is the better option as I suspect the 2RZ won't last 25 times more than the 2RS1 especially because I am not really allowed to drive flat out that often ... %)
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Re: Driveshaft intermediate bearing

Postby Giniw » Mon 26.11.2018, 23:00

In the end I just ordered a 6206-2RS.
Interestingly I apparently ordered one in 2017 but for some reason the order had been cancelled, I really don't remember it and cannot find any trace in my emails ... I hope I will get it this time %)
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Re: Driveshaft intermediate bearing

Postby Brit-Car-Nut » Mon 26.11.2018, 23:21

I picked up a few 6206-2RS bearings that seem to have a RPM limit of 7500RPM. They were $6.00 each with FREE postage.

At 6,000 RPM In 5th gear, the output shaft would be turning at the engine RPM divided by the .829 = 7,238 RPM and at 3.833 Final Drive Ratio, the axle should be turning at 1,890 RPM . That seems to be below the 7500RPM limit of the standard bearing?

Maybe you were forgetting the output rpms then go through the final drive and the driveshaft is reduced by that ratio.
Last edited by Brit-Car-Nut on Mon 26.11.2018, 23:55, edited 1 time in total.
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Re: Driveshaft intermediate bearing

Postby Giniw » Mon 26.11.2018, 23:48

Brit-Car-Nut wrote:3.833 Final Drive Ratio, the axle should be turning at 1,890 RPM [...]
Maybe you were forgetting the output rpms then go through the final drive and the driveshaft is reduced by that ratio.

Ooops, indeed :oops: :D
Thanks! :-D
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Re: Driveshaft intermediate bearing

Postby Simon_P » Tue 27.11.2018, 10:51

You don't want a C3 bearing it has increased clearance so it will be loose to start with. the rev limit for C3 is likely to be higher because they are designed for applications that get hot eg high revs - the heat causes the metal to expand reducing the clearance to "normal".

2RS = 2 rubber seals ZZ is 2 metal seals (with rubber sealing underneath) RS or Z is only sealed on 1 side but they are usually a lot more expensive. Buy a high quality bearing it has a tough life.
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Re: Driveshaft intermediate bearing

Postby Giniw » Tue 27.11.2018, 18:51

Simon_P wrote:the rev limit for C3 is likely to be higher because they are designed for applications that get hot eg high revs - the heat causes the metal to expand reducing the clearance to "normal".
Yes that was my thought too and that looked possibly OK until Brit-Car-Nut noticed I got confused with the final ratio :oops:
But it's OK as, as I said I ordered a 6206-2RS-SKF so all is well =)
Hopefully I should get it soon.

2RS = 2 rubber seals ZZ is 2 metal seals (with rubber sealing underneath) RS or Z is only sealed on 1 side but they are usually a lot more expensive. Buy a high quality bearing it has a tough life.
Yes thanks, actually I found the nomenclature system: http://www.skf.com/us/products/bearings ... index.html
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