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Posted by: kg6dxn May 21 2013, 01:59 PM

Where can I get a bunch of Schnorr washers? PP has them for $1 each. EACH! seems like a rip off. $24 +shipping for washers is a bit much...

McMaster has non serated ones cheap, but not what I want.

Posted by: shuie May 21 2013, 02:16 PM

You can get them in small bags from McMaster. They are listed a little goofy in the catalogue (Belleville Spring Washers), but they are there.
http://www.mcmaster.com/#safety-washers/=mum792

If you need them in really small quantities you can probably call the North America distributor for Schnorr and ask them for some samples.
http://www.schnorr.com/safetywashers.html
Phone: 734.677.2683

Posted by: Jaymann May 21 2013, 02:27 PM

I would call jonathan at GPR,he can prob hook u up.Jaymann

Posted by: SirAndy May 21 2013, 02:31 PM

http://www.schnorr.com/

Posted by: rhodyguy May 21 2013, 03:09 PM

the part # for the belleville is #93501A030.

Posted by: Java2570 May 21 2013, 03:11 PM

Eric @ PMB has them also.....

Posted by: McMark May 21 2013, 05:13 PM

with the McMaster number. Or drop by and I'll hand you as many as you want.

Posted by: two-strokejohn May 21 2013, 06:16 PM

belmetric.com

Posted by: Spoke May 21 2013, 07:14 PM

Support a loyal 914 supplier.

Posted by: rick 918-S May 21 2013, 08:35 PM

I'm sure I've seen them at my local Ace Hardware.... I'm going to have to take another look.

Posted by: draganc May 23 2013, 02:04 PM

I would say it doesn't matter.

Posted by: McMark May 23 2013, 02:09 PM

It absolutely does matter. The ID should be towards the fastener head. If you want to know why, do a search because I've typed it before.

Posted by: worn May 23 2013, 03:22 PM

Looks like if you have a stationary part and a turning fastener head, that you would want the convex up and the concave side down. That would seat the washer. I say this because I didn't understand the abbreviation ID in this context. So this is a guess.

Posted by: rjames May 23 2013, 05:00 PM

A pic from 'Original Customs' taken from another thread:

Posted by: McMark May 23 2013, 06:12 PM

ID = inside diameter

The ID of the washer is roughly 8mm. If the hole in the cv joint is 8.5mm and you install the washer upside down then the washer will drop down into the hole slightly, thereby decreasing the spring tension of the washer.

Posted by: draganc May 23 2013, 07:32 PM

Thanks for the explanation, which I fully agree and have installed my cv joints the same way plus safety wire.

Not to start a pissing or "screwing" contest but don't you think that the OD area, when torqued, would "pull" the ID back out of the hole when flat?

I tried looking for your previous post - unsuccessfully. I did however look up the schnorr.de page and they stated that the washer are reusable (I would/did change them, like you, for peace of mind and because they are low cost) and no reference about orientation.

I have installed cv joints on two cars and I'm sure you have done plenty more, not challenging your experience just asking for better understanding.

dc

Posted by: McMark May 23 2013, 10:11 PM

No, I love a good debate.

Theoretically I agree that the OD would 'pull it flat'. But the purpose of the washer is to apply force and increase the friction on the threads. Shortening the 'lever' of that spring reduces the force. Think about loosing a lug nut with a 12" wrench or a 24" wrench.

Posted by: draganc May 24 2013, 08:39 AM

Well, let the games begin:

Theoretically you are right and I did/will follow "your" way. Even the fact that I believe it doesn't matter a lot - but that's just my opinion.

Do you also increase the torque value by 10%, as per schnorr, for zinc plated screws?

Posted by: McMark May 24 2013, 10:50 AM

It probably doesn't matter a lot in practice. But I try to be the guy who puts in a little extra effort to do things a certain way. I often install washers with the rounded edges toward the paint to avoid scratches and put nuts on with the stampings out.

The torque values presented by Porsche were developed for Schnorr washers, so in a way, yes.

Posted by: kg6dxn May 24 2013, 12:14 PM

It would appear that Mark is correct about mounting of the washer. Tha washers however can be stacked in both directions. When a single washer is used, it needs to be oriented as per Marks suggestion. If the washers are stacked, it will multiply the torque. See handbook.

Everything you ever wanted to know about Schnorr washers...
 Schnorr_Handbook.pdf ( 1.41mb ) Number of downloads: 329