Learning more. After some study of the SKF site I think I have drawn the conclusion that the "J" in suffix "J2" designates that the bearing contains a pressed steel roller cage which agrees with what I have (standard). I have yet to learn what the 2 with the J means.
The bearing number "30203J2/VT108" includes another suffix. My best guess now is that the VT108 is part or all of a lubricant spec. I have sent off a "contact us" to SKF to see if I can learn more. This specific bearing appears to have had "Blue Grease" in it.....not sure from when/where.
WHERE DOES THIS PART GO????
Re: WHERE DOES THIS PART GO????
This is a 30203J bearing. Notice the large radius on the side of the bearing.
The 'seat' in the hub is about 3mm (1/8") wide.
The radius of this bearing means that it is supported by less than 1mm of hub.
The 'seat' in the hub is about 3mm (1/8") wide.
The radius of this bearing means that it is supported by less than 1mm of hub.
Lord of the Bings
Re: WHERE DOES THIS PART GO????
Who makes that again? It should be right on it---although that might not be what it really is or who really made it. Where did you buy it?ME 109 wrote:This is a 30203J bearing. Notice the large radius on the side of the bearing.
The 'seat' in the hub is about 3mm (1/8") wide.
The radius of this bearing means that it is supported by less than 1mm of hub.
Re: WHERE DOES THIS PART GO????
It's an NSK bearing made in Japan.
I've had it offered to me by two bearing sellers in my area. The bearing is fine, the radius isn't.
The 30203 appears to designate the important part......40mm x 17mm
The height? of the bearing changes with prefix and suffix, I've seen (iirc) 10.5mm, 11mm, 13.5mm
Although these measurements don't really matter.
I've had it offered to me by two bearing sellers in my area. The bearing is fine, the radius isn't.
The 30203 appears to designate the important part......40mm x 17mm
The height? of the bearing changes with prefix and suffix, I've seen (iirc) 10.5mm, 11mm, 13.5mm
Although these measurements don't really matter.
Lord of the Bings
Re: WHERE DOES THIS PART GO????
Actually it designates it all. Prefixes and suffixes indicate variations in some cases. (precision tolerance, sub assembly, etc)ME 109 wrote:It's an NSK bearing made in Japan.
I've had it offered to me by two bearing sellers in my area. The bearing is fine, the radius isn't.
The 30203 appears to designate the important part......40mm x 17mm
The height? of the bearing changes with prefix and suffix, I've seen (iirc) 10.5mm, 11mm, 13.5mm
Although these measurements don't really matter.
The heights can be confusing, there are 3, one for the outer race, one for the inner and one for the assembly. These are detailed on the Timken site reference I listed. They use an X and Y prefix for the inner and outer alone.
One thing I noticed poking around was a lot of Chinese distributors selling "name" bearings to the US. One listed country of origin of a 30203 as Sweden. Why would someone ship bearings to from Sweden to China so they can be shipped again to the US? The advantage of cheap Chinese labor hardly applies. A US bearing distributor buys from SKF ( for instance) and the shipping is either from the local SKF distribution point in the US (they make massive shipments to keep the cost down) or they are drop shipped from the Swedish (or Brazilian or other) plant. You don't bounce product back and forth around the world and make money. But one thing that is done, and the Chinese are known for it, is make counterfeits. Two guys in a shed (and here the cheap labor matters) can manually feed a laser engraver and turn $.75 bearings into $15 bearings to move on eBay or through other dubious channels. If the bearing you have doesn't meet the basic spec on the NSK site, (and it doesn't) maybe it ain't a NSK bearing? If I had been able to find a 30203J bearing with the spec. you note, I wouldn't be thinking these thoughts. I only gave it a half hour...but try it yourself. Every bearing manufacturer publishes drawings and dimensions of their stuff. Find a 30203J. I think I gave a reference to the NSK catalog, scroll down, right side of the page. There is the 30203J with all it's dimensions. The radius listed isn't what you show in your pic. So sumthin' funny.
A big radius on the outer race is odd. On the inner race is common. When you do a shoulder on a shaft you might put
in fat radius to avoid a stress riser. So the bearing is made to match this. But outer races go in bores and the need for a big radius is uncommon.
I noticed the 30203J was being called out for a number of inferior brands of bikes and ATVs. You might drop by one of those dealer (in dark sunglasses) and see what one of theirs looks like.
Re: WHERE DOES THIS PART GO????
Who knows where anything is made these days and by whom.
Anyway, don't use a NSK 30203J
Anyway, don't use a NSK 30203J
Lord of the Bings
Re: WHERE DOES THIS PART GO????
The people who need to get it right make a point of knowing. Others operate on superstition.ME 109 wrote:Who knows where anything is made these days and by whom.
Anyway, don't use a NSK 30203J
(TBC)
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Deleted User 62
Re: WHERE DOES THIS PART GO????
Oh great, now you've jinxed it...!PITAPan wrote:The people who need to get it right make a point of knowing. Others operate on superstition.ME 109 wrote:Who knows where anything is made these days and by whom.
Anyway, don't use a NSK 30203J
(TBC)
Re: WHERE DOES THIS PART GO????
PITA, the people who think they know it all, often turn out to be either Booker, or Fuller.PITAPan wrote:The people who need to get it right make a point of knowing. Others operate on superstition.ME 109 wrote:Who knows where anything is made these days and by whom.
Anyway, don't use a NSK 30203J
(TBC)
Booker knowledge, or Fuller shit.
It maters not who makes 30203j or where they are made.
Relevant point is, don't use them.
Lord of the Bings
Re: WHERE DOES THIS PART GO????
Some people will argue endlessly in an attempt to be right. Others will argue endlessly in an attempt to find truth. The former have no interest in truth, they are simply interested in being right (ideally at someone elses expense). You can spot them when they say things like, "It so because I say it's so". They also get into semantic fallacies, bullying---whatever it takes to be right.ME 109 wrote:PITA, the people who think they know it all, often turn out to be either Booker, or Fuller.PITAPan wrote:The people who need to get it right make a point of knowing. Others operate on superstition.ME 109 wrote:Who knows where anything is made these days and by whom.
Anyway, don't use a NSK 30203J
(TBC)
Booker knowledge, or Fuller shit.
It maters not who makes 30203j or where they are made.
Relevant point is, don't use them.
The ones interested in truth say things like, "show me your data". If you can't make a decent presentation you just get blown off.
Edit: On a separate note, YOU should never buy these bearings again. I would say that would be asking for trouble---for YOU. The reasoning is kind of...mm..odd. Sorta depends on how religious you are, or how good a physicist. Those two groups have converging views of the nature of reality. Suffice it say that once you are convinced of something it changes the reality you live in. You will find what you expect to find. I'm a pretty hard core empiricist but I've become convinced. Perhaps I wanted to be. Ouroboros.