Schnell Gelb

Which bearing you mean? Please be specific to avoid wasting time with confusion. I have asked several times.I'll make it easier -here is a list of a few of the more popular ones:
1. LN IMS 2 row retrofit ? SKU: 106-08.4
http://lnengineering.com/products/im...r-my97-01.html
2. Gen 2 Pro IMS retrofit(staggered dual row+ external wire retainer)
3. IMS solution
4. Vertex/EPS roller ?
5. OEM single
6. OEM double
If you mean 1. above -any bearing chart will give you the shear(not sheer!) data for the retainer ring or Spiro Lox. LN would probably give you a range - if you ask nicely.It is standard bearing data. My guess is 10,000lb+ .That is why such a powerful tool is required to extract it. If the IMSB receives thrust loads that exceed that spec - we have other problems ! And it isn't the Spiro Lox.

5CHN3LL

Schnell, maybe you could consider using PM to badger other members and then post a summary of whatever information you consider to be of value.

Your questions are both pedantic and condescending in tone - and while I recognize that this is your intent, it's getting old.

Schnell Gelb

I am trying to understand the guy.
If you know which bearing he means please let us know.It makes a big difference to the discussion about thrust forces on the IMSB for which we have no public data and we are trying to find - because it is the crux of the Roller vs ball debate.

5CHN3LL

Really? It seems like you're more interested in applying your linguistic and semantic forensics to determine if two IDs are owned by the same user and delivering sidehanded, sarcastic digs...of course, if I've misread your intentions, I'm deeply sorry.

Schnell Gelb

English is Martin's 3rd language. I am trying to help him. Common English is difficult enough but engineering English/American is more so. That is why I use photos, numbers.links and short sentences and apologized for being pedantic long ago.
Martin is one of the few to have recently made a challenge to the IMSB issue.He deserves a fair hearing ?That is a basic American value.The last challenger was Feelyx - and that protracted discussion produced - yes -the roller bearing IMSB.
But I agree the Spiro Lox is a dead objection imho. I give up.
The heat and pressure bleed we may never get to discuss. I give up.
Pity.
I am all for Rennlisters having more choice in products but not buy ineffective, expensive products. Time will tell on the cylindrical roller bearing+thrust flanges. I am still kinda rooting for it as an underdog. And for Martin/Scott since he reformed.A reformed sinner -has an American value too. I'm done.

Cuda911

I thought Martin's written English was pretty damn good for it not being his first language. You should see the crap I have to read each and every day for work, written by people that grew up in the U.S. Appalling, really.

mcbit

With all this new found engineering knowledge I guess that I have to accept that 2 stroke racing engines that rev to +15,000 rpm with roller bearing: big ends, small ends and mains whilst being lubricated by an oil in fuel mixture are a mere figment of my imagination.

gaprecisiongear

79,000 miles, Bearing as good as new, no signs of wear no grease left. engine oil was present. Good point about the 2 smokers pushed them to the limit never had bearing failure. even with the newer four strokes 250s and 450s Ball bearings for the outter cams and cranks. I do think the load is less, the rpm`s are out the roof. This bearing looks like it would have gone another 79,000. You just never Know.
Cheers Scott

aftCG

You have 79k on the EPS bearing (the four pieces to the left, including the nut)? Or on the stock two row ball bearing with the snapped cage?

And, what is the story on that snapped cage?

RE: the retaining ring,
There's a groove on the inside of the IMS which lines up with the groove in the two row bearing. The ring is squeezed into the groove on the bearing for installation and expands into the groove in the IMS, so it is partially in each groove.

That ring snapped, exactly as Wayne's book said it would, when I pulled mine out.

It's only part of the reason it takes a beefy tool to pull the bearing out. Don't forget that the bearing is an interference fit in the IMS and would get quite a lot of traction all by itself.

gaprecisiongear

Sorry, 79,000 miles, on original ball bearing, I cut the outer race for inspection, Bearing was as good as new. I put the new EPS bearing in the pic to show the new design, I heard there was a washer for the thrust, this kit has no washer. very easy install. with oil pump modification 6 to 7 hours.

I am left wondering why the old bearing is perfect after 79,000 with no grease, only motor oil inside the seals. better to be safe than sorry, now that it is done
i stopped having nightmares of bearing failure.
Cheers Scott

ltusler

And in a dual row LN bearing, you place the spiroloc in the groove previously occupied by the snap ring you break when removing the stock bearing.

Jake Raby

The last Porsche engine to utilize a roller bearing crank was the 547, in 1958.

docmirror

Betting Porsche would go back in time and spec it for the IMSB if they could.

Roller bearings aren't found in mass production primarily for cost reasons, nothing to do with load, utility or MTBF. If that's what you were implying. BTW, the 547 had a pretty remarkable run all things considered.

jhonnydivine

in my opinion the bearings Kyosho ( http://www.acerracing.com/Kyosho-19-1.html ) are the best, both for quality and for life . There are all kinds of ( ceramic and steel) and any measure . costs are the highest , but the quality has a price .
Boca Bearings and OEMs , are better than steel , speak well of them in many forums even though I've never tried. bearings Omnia , good price and high quality , http://www.omniabearings.com/bearings/roller_bearings/cylindrical_roller_bearings , I read about them on helifreak , which are the Germans , of excellent quality , durability, and you can find all measures . Void are of inferior quality , even if they speak well , i do not like its, even if they have very low prices . So the best are Kyosho and Omnia . according to me are better than steel than ceramic .
I hope it help

Schnell Gelb

1st post and Johnny the Divine bearing guru chooses this one to loose his virginity with. Why?