Russell,
if it wasn't for the debris/possible rubbing concern you are probably correct... my concerns could be not an issue but at least I would say it was reasonable to question it expecially since it is different than OEM. There is probably a chance the FAG is superior.. but I don't know the...
Russell,
I'm probably over thinking this, I've been know to do that.
Take a look at this tread, it has a Visio picture showing that the seal runs very close to the mounting structure and there is a place for debris to build up... this is why I like the conventional seal configuration...
unclesyd,
yes, I think it works as you say.
the only remaining question/issue is that where the outer part of the shield runs near the outer ring...I have contamination and the ledge the bearing is pushed against is close to the moving seal..
stay tuned as I get more info.
thanks for the comment
Russell,
I took off a seal and discovered something...
There is another sealing system under it.
The outside ring is lightly sealed with the red seal but looks to be heavily sealed by the black seal underneath.
See pictures...
you should see a angle view of the bearing with top seal off and...
Russell,
yes, I was thinking of doing just that. But still the seal needs to "lock" on the outside ring and slide on the inside ring.. I'll let you know what I find and post another picture.
-Henry
I have two bearings with the same defect... I have an RMA number to send them back and get my money back... those FAG bearings are either defective or the wrong application. I'm still working with FAG and the Porsche parts company that sold them to me to help them diagnose if they want me to...
last night and again this morning I tried pushing the seal to get it moved or locked on the outer ring... couldn't make it happen.. I opened the other bearing box with #2 of this bearing to see if it had the same issue.. it does.
my current conclusion is that the seal is the wrong part for...
update - I called FAG and talked with app. engineer Antonio Silverio. He pulled the drawing and didn't notice any thing different called out regarding the seal. The seal should be the standard type that slips on the inner ring. We thought to hold the seal and see if I could get it to slip. I...
unclesyd,
thanks, seems like the link covered face sheilds in general. I'm thinking that the lip sliding on the outer race is not good for this app. I'll try and remember to post here if I can get to FAG and ask about this...
In any case I think I have to pull the bearing out because a used a...
Mike,
good thinking re. possible functions of seal running on the outside race..
1 - the wheel many times doesn't spin very fast... so likely the rotation would generate fairly low forces
2 - I don't think any water would get in the bearing.. if it did I'd likely have failure before it would...
Application - Rear wheel bearing 1989 Porsche 911
Original SKF bearing was a dual row angle contact ball bearing. PN 305988 42mmx80mmx42mm The seal slips on the inner race.
I got a "replacement" FAG 527243CA - the seal slips on the OUTER race. In other words the seal is moving. My question...
Mike,
I just had an idea..
I might be able to estimate the hoop stress because it is basically an interference of two hoops...
I know the interference addition per turn because the threads are tapered I think 3/4" per foot or something like that...
Does that make sense?
-Henry
Mike,
Thanks. We need to ask fitting supplier what the exact alloy of the brass is, we don't know yet. I think we want to get comfortable that if we reinstall new parts to replace cracked parts that we are not near over stressing the material. For example if 2.5 turns past finger tight gives...
Would like some help finding link to equations to calculate the hoop stresses in the female side of NPTF/NPTF 1 1/4" connection. The material is brass. The current best guide from Parker is to use the TFFT. ... for 1 1/4" the TFFT is 1 1/2 turns to 2 1/2 turns. Some fittings may have been over...
