FD says their SKF is of the 'Super-Precision class'.

http://forums.rennlist.com/rennforums/boxster-and-boxster-s-986-forum/806229-fvd-brombacher-high-quality-ims-repair-kits-are-495-new-release.html

Note price, claims, tool, no instructions, professional installation. As usual, no data on any testing done.

(Sorry to bring the subject up again but if I'm to spread the word about an offering from maker "A", I should do the same for maker "B".)

I saw that myself. They did mention that their bearing was made by SKF and was of their "Super Precision" class. [www.skf.com]

I note their photos show not just the bearing, but a flange

1. Is that flange specific to their bearing?

2. If so, could their bearing be used with Pedro's DOF flange?

3. I didn't see any suggestion that their seal has been DESIGNED to work in the oil-drenched environment of the IMS.

4. Is there any indication that their seal would not suffer the same fate as other IMS bearing seals?

...
Im sure the SKF bearing will fit the DOF flange (because it's the same we offer!).
Happy DOF'ing,
Pedro

Pedro Bonilla
1998 Boxster 986 - 311,000+ miles: [www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)

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Racecar spelled backwards is Racecar

"Racing is life. Anything before or after is just waiting" ... Steve McQueen as Michael Delaney in "LeMans"

"If you wait, all that happens is that you get older"... Mario Andretti

"Being second is to be the first of the ones who lose" ... Ayrton Senna

Pedro, are yours, as well?

Our business is not the bearing, it's the DOF, but I can get any bearing you want.
Our slogan is: We don't make bearings. We make bearings last!
Happy DOF'ing,
Pedro

Pedro Bonilla
1998 Boxster 986 - 311,000+ miles: [www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)

---

Racecar spelled backwards is Racecar

"Racing is life. Anything before or after is just waiting" ... Steve McQueen as Michael Delaney in "LeMans"

"If you wait, all that happens is that you get older"... Mario Andretti

"Being second is to be the first of the ones who lose" ... Ayrton Senna




Edited 1 time(s). Last edit at 04/08/2014 11:45PM by Pedro (Weston, FL). (view changes)

I know; I get that.

You'd said that FD's SKF bearing is 'the same we offer'. So, I was simply trying to ascertain whether they are identical, or simply 'the same" in the sense they are both SKF bearings

... "All Natural," which has no lawful (as far as I know) standard of definition?

ABEC-1, ABEC-5, ABEC-7, and ABEC-9, with ABEC-9 being the most precise bearing which I guess could be referred to by a layman as a super-precision bearing.

[www.skf.com]

Pedro Bonilla
1998 Boxster 986 - 311,000+ miles: [www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)

---

Racecar spelled backwards is Racecar

"Racing is life. Anything before or after is just waiting" ... Steve McQueen as Michael Delaney in "LeMans"

"If you wait, all that happens is that you get older"... Mario Andretti

"Being second is to be the first of the ones who lose" ... Ayrton Senna

bearing is what class is being referred to but there is at least a super-precision bearing.

Yes, it remains a mystery.

"Supercalifragilisticexpialidocious"
[www.youtube.com]

Edited 1 time(s). Last edit at 04/09/2014 09:17AM by MikenOH. (view changes)

Looks like super-precision is one of the higher classes, which of course is what one would expect.

The IMSB is not the only place a super-precsion bearing is used in these engines. Just had the idler roller and tensioner roller bearings replaced in my 996. The tensioner roller bearing got noisy. These have to be high precision bearings. They spin at probably the same speed as the engine, up tp 6750 RPMs, and have to be quiet and run smooth and withstand considerable heat.

Oh, about super precision bearings. One can't just slap a super precision bearing into a situation and derive the benefit of a super precision bearing. Rigidity of the assembly into which the bearing fits, the shaft to which it attached, proper lubrication among other things, all contribute so the the super precision bearing can deliver the expected superior service.

How do these compare with the LN Engineering bearings?

If you want a really SuperPrecision Bearing -
Note I said "want" not "need" a Super Precision bearing - because I have no evidence it would make a significant difference to longevity/heat nor any other performance variable for our IMS application.
An expert (not me!) on another unmentionable Forum posted that surface roughness(Ra) was a more critical factor than just dimensional precision.He also asserted that he would only use an IMS bearing with pressure lubrication on his Porsche.I believe he is the ex-Timken guy that LN used for consulting? So an affirmation of DOF for Pedro !
If you want to try a very high quality bearingat a reasonable price, I found 20+, ABEC 9 ,NTN6204 2RS ,Yes 9/nine bearings and they have a steel cage ,not phenolic.And yes the balls are steel not ceramic.You would have to remove 1 seal and perhaps 'shave' the open face a little to fit the circlip??? And clean the bearing very,very well after that shave!
Source: "Locatebearings".They are in Palm Desert Ca .Mark quoted $105 each.
Call "Mark" at 800 409 3632. But place your order in writing/Internet ,not verbally over the phone.Carefully check the part number you order/receive to ensure it is ABEC9. A lower ABEC grade 6204 NTN bearing could be found on EBay for $10 !So ABEC 9 needs to be on the order and the receipt and you need to confirm on the NTN website catalog that you use the full & correct part number.You don't want to pay $100+ for a $10 bearing!

Only buy via a special Listing they create for you on EBay or Amazon in case you have a problem with the spec.Google "LocateBearings" first.
I have no affiliation with Locatebearings ,just sharing very obscure info.