Know your bearings!

When it comes to engines there are a couple parts you wouldn't want to even think about skimping on, such as your crank or bearings. Imagine them going.

There is a lot of crap bearings being sold via the gray market and now some reputable shops won't even carry major brands, such as SKF. And there is a lot of inconsistency of quality in the some major bearing brands. Ask your shop what their policy is on bearings.

Remember when Mongoose BMX bikes were great bikes or when Iams was one of the top three dog foods? It wasn't that long ago! Now you can find Mongoose bikes being sold at Target and Iams at Walmart. People I speak with say, Iams is great food! Until I show them the ingredients and they feel like crap for feeding it to their dog for so long. They didn't do their research -- they just went off of brand name and previous reputation.

One reputable shop told me, "The gist is that our main bearing supplier won't order SKF bearings any more, because SKF will not guarantee which country the bearings were made in. He'd order the same stuff month to month, and one month they might be from Germany, and the next from India. He has clients with much higher stress applications than us, and they need a guarantee of quality, which can't be done when the bearings come from different countries like that. So, he won't stock SKF anymore, and nor will many other proper bearing houses."

Please always ask your bearing distributer where your bearings were made (it must be stamped on the bearing) and confirm that it was made to be used in the USA.

The shop also explained to me . . .

We don't use bearings from India full stop. The quality is too up and down and there have been plenty of problems with them over the years. Some seem fine, and other have catastrophic failure.

It doesn't matter which manufacturer made the bearing. You have to know 100% where the bearing was made and which country it was intended for. Which is why we only buy bearings from the same bearing house we've been buying from for years.

NSK bearings can be made in China. It depends who you are getting them off. If there is no country of origin marked on the bearing, they are from China.

Also, if you buy a bearing that was brought in on the grey market, there is no guarantee of quality, even of it was made in Japan or Europe. Dodgy bearing dealers import cheap bearings that were made for other countries, and not intended for use in the US. They are lower quality. Look for the case "SKF USA, Inc. v. International Trade Commission, 2005". It explains it all, and even some official brand bearing dealers are doing it.

Do your research! Eating it at 60 mph on 10 inch tires isn't worth it.

I ordered most of my bearings from Kaman Industrial Technologies and two of them are stamped "Japan" and the third (6305VV.C3) is not stamped at all. I called my rep immediately and said "are they from China?" She told me according to NSK . . . "PER FACTORY ALL MADE IN JAPAN". I feel a little a nervous.

Please do comment should you know anything contrary to this.

I emailed NSK the following:

Hello NSK,

I am rebuilding a vintage Lambretta scooter that can travel upwards up 60 mph and I purchased NSK bearings (some will be exposed to gasoline/oil mixture and require the tolerance for an engine) for the engine because of the positive reputation NSK has. I purchased them through Kaman Industrial Technologies.

From doing research, I have learned that there are a lot of grey market bearings be sold in the USA, which were not intended for use in America. Some of your name-brand competitors have gone to court over this because those bearings and stamped with their name on it. Bearings that do not have the country stamped on it often come from China and may not be of USA quality.

My questions are:
1) My biggest concern is I purchased NSK 6305VVC3 Radial Ball Bearing and there is NO indication of what country it was made in. The bearing is not stamped on the metal. The seals are stamped "6305V NSK A29" and the other side is stamped "6305V NSK A33". The bearing does not even indicate it is a C3 tolerance bearing, only the box does. The box does not indicate what country it was made in. Are you able to tell me where this bearing was made? And can you tell me if it was intended for use in the USA?

2) I purchased two other bearings that are stamped "Japan" and on the back of both boxes it says "made in Japan." The bearings are: NSK NU205M Cylindrical roller Bearing and NSK 6004 Radial Ball Bearing. Can you confirm that these were made for use in USA?

My thought is it's better to ask now and get the details on the bearings. I don't want to find out in 2-3 years when I am going 65 mph on the free way for a short spurt in heavy traffic and to have a bearing fail, which has happened to other scooterists with different name brand bearings.

3) The bearings I ordered are "industrial bearings" not automotive said Kaman Industrial Technologies. Is this a problem?

Thanx in advance for your help,

Jeremy

Within four hours I received this response to my email from NSK:

"Jeremy,

Thank you for your interest in NSK. I hope the below response will help address any of your concerns.

Kaman Industrial Technologies is an Authorized NSK Distributor. It is unlikely that you would receive gray market bearings from this distributor. NSK 6305 bearings are manufactured in the US in Clarinda, IA. We do not mark our bearing that are made domestically with manufacturing location. For this particular size the C3 clearance is also not etched or stamped on
the bearing. The marking on the seals of the bearings that you have purchased include the bearing series ( 6305) and the manufacturing lot number.

NSK bearings that are marked "Japan" are manufactured in Japan and are intended for sale in the US.

You can be assured that the 6305 that you have purchased have been made in the US.

6305 bearing are used in other industries and applications other than automotive therefore the reason they were not listed as "automotive" bearings.

If you have any additional questions please feel free to contact me.

Thank you,

Heather Strack
NSK Corporation
Marketing Communications