|
|
Thread Tools | Display Modes |
#21
|
|||
|
|||
Carbon component design news
On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich
wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client.android.app.oneide ntity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html -- Jeff Liebermann PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
Ads |
#22
|
|||
|
|||
Carbon component design news
On 3/11/2021 1:39 PM, Jeff Liebermann wrote:
On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client.android.app.oneide ntity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html It's a real thing. I just lost a front wheel auto bearing. The originals went 54 years. The chinese bearings included with the spindle kit lasted 1-1/2 years. Yikes! -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#23
|
|||
|
|||
Carbon component design news
On Thu, 11 Mar 2021 11:39:30 -0800, Jeff Liebermann
wrote: On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client.android.app.oneide ntity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html Or, perhaps, buy from a proper bearing shop and disdain the cheap bearing being flogged on the Internet :-) -- Cheers, John B. |
#24
|
|||
|
|||
Carbon component design news
On Thu, 11 Mar 2021 14:25:03 -0600, AMuzi wrote:
On 3/11/2021 1:39 PM, Jeff Liebermann wrote: On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client.android.app.oneide ntity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html It's a real thing. I just lost a front wheel auto bearing. The originals went 54 years. The chinese bearings included with the spindle kit lasted 1-1/2 years. Yikes! Sorry about the wheel bearing problems. I've been having similar problems with aftermarket chainsaw overhaul kits. Most claim to be Nikasil (nickel on silicon carbide) plated. A few actually are. The factory rebuild kits seem to last forever. The aftermarket kits, much less. In winter 2018, I was helping with a vertical mill spindle rebuild which included replacing all of the bearings. http://www.learnbydestroying.com/jeffl/CNC%20Conversion%20Project/Shizuoka%20Bearings3.xlsx Most of the bearings were purchased on eBay. I tried to buy only from bearing distributors with ebay sites who sold bearing that were made in Japan. We also measured what we could before installing the bearings. Two of the commodity bearings (6002ZZ) had an eccentric inner race and what might have been variations in bearing diameters. I purchased six more replacements from three different sources, all of which measured fine. Incidentally, this was a latex glove job as any corrosion from sweat would take the bearings out of tolerance. With only 2 possible counterfeits out of 19 bearings, I guess I was either sufficiently careful, or very lucky. -- Jeff Liebermann PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
#25
|
|||
|
|||
Carbon component design news
On 3/11/2021 6:03 PM, Jeff Liebermann wrote:
On Thu, 11 Mar 2021 14:25:03 -0600, AMuzi wrote: On 3/11/2021 1:39 PM, Jeff Liebermann wrote: On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client.android.app.oneide ntity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html It's a real thing. I just lost a front wheel auto bearing. The originals went 54 years. The chinese bearings included with the spindle kit lasted 1-1/2 years. Yikes! Sorry about the wheel bearing problems. I've been having similar problems with aftermarket chainsaw overhaul kits. Most claim to be Nikasil (nickel on silicon carbide) plated. A few actually are. The factory rebuild kits seem to last forever. The aftermarket kits, much less. In winter 2018, I was helping with a vertical mill spindle rebuild which included replacing all of the bearings. http://www.learnbydestroying.com/jeffl/CNC%20Conversion%20Project/Shizuoka%20Bearings3.xlsx Most of the bearings were purchased on eBay. I tried to buy only from bearing distributors with ebay sites who sold bearing that were made in Japan. We also measured what we could before installing the bearings. Two of the commodity bearings (6002ZZ) had an eccentric inner race and what might have been variations in bearing diameters. I purchased six more replacements from three different sources, all of which measured fine. Incidentally, this was a latex glove job as any corrosion from sweat would take the bearings out of tolerance. With only 2 possible counterfeits out of 19 bearings, I guess I was either sufficiently careful, or very lucky. At the parts store there were three choices for that bearing all the same price $9.49. Two were china. I bought the ROC bearing. The brand name on the box has become meaningless. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#26
|
|||
|
|||
Carbon component design news
On Thursday, March 11, 2021 at 2:57:47 PM UTC-8, John B. wrote:
On Thu, 11 Mar 2021 11:39:30 -0800, Jeff Liebermann wrote: On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client.android.app.oneide ntity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html Or, perhaps, buy from a proper bearing shop and disdain the cheap bearing being flogged on the Internet :-) John, will you are least attempt to think? Shops are buying from distributors and they are buying from suppliers that could be getting these counterfeit bearings themselves totally innocently. China will not take any action against their people putting these things on the market and it is extremely difficult to discover where in the supply chain they are being switched. The ONLY way we know of this is because major Japanese manufacturers saw an unwarranted drop in demand and investigated it. |
#27
|
|||
|
|||
Carbon component design news
On Thursday, March 11, 2021 at 5:48:37 PM UTC-8, AMuzi wrote:
On 3/11/2021 6:03 PM, Jeff Liebermann wrote: On Thu, 11 Mar 2021 14:25:03 -0600, AMuzi wrote: On 3/11/2021 1:39 PM, Jeff Liebermann wrote: On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client..android.app.oneid entity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html It's a real thing. I just lost a front wheel auto bearing. The originals went 54 years. The chinese bearings included with the spindle kit lasted 1-1/2 years. Yikes! Sorry about the wheel bearing problems. I've been having similar problems with aftermarket chainsaw overhaul kits. Most claim to be Nikasil (nickel on silicon carbide) plated. A few actually are. The factory rebuild kits seem to last forever. The aftermarket kits, much less. In winter 2018, I was helping with a vertical mill spindle rebuild which included replacing all of the bearings. http://www.learnbydestroying.com/jeffl/CNC%20Conversion%20Project/Shizuoka%20Bearings3.xlsx Most of the bearings were purchased on eBay. I tried to buy only from bearing distributors with ebay sites who sold bearing that were made in Japan. We also measured what we could before installing the bearings. Two of the commodity bearings (6002ZZ) had an eccentric inner race and what might have been variations in bearing diameters. I purchased six more replacements from three different sources, all of which measured fine. Incidentally, this was a latex glove job as any corrosion from sweat would take the bearings out of tolerance. With only 2 possible counterfeits out of 19 bearings, I guess I was either sufficiently careful, or very lucky. At the parts store there were three choices for that bearing all the same price $9.49. Two were china. I bought the ROC bearing. The brand name on the box has become meaningless. NTN is one of the best bearings in the world and also that most counterfeited by the Chinese. Their bearings have about 25% of the life or less at high speed. Even Japanese auto manufacturers are getting fooled and in-head cam engines suffer a great deal from these poor bearings. Mazda engines are particularly at risk of poor bearing quality. How would you like your 50 thousand dollar car to break a crankshaft which of course destroys the block. |
#28
|
|||
|
|||
Carbon component design news
On Fri, 12 Mar 2021 08:18:24 -0800 (PST), Tom Kunich
wrote: On Thursday, March 11, 2021 at 2:57:47 PM UTC-8, John B. wrote: On Thu, 11 Mar 2021 11:39:30 -0800, Jeff Liebermann wrote: On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client.android.app.oneide ntity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html Or, perhaps, buy from a proper bearing shop and disdain the cheap bearing being flogged on the Internet :-) John, will you are least attempt to think? Shops are buying from distributors and they are buying from suppliers that could be getting these counterfeit bearings themselves totally innocently. China will not take any action against their people putting these things on the market and it is extremely difficult to discover where in the supply chain they are being switched. The ONLY way we know of this is because major Japanese manufacturers saw an unwarranted drop in demand and investigated it. All I can say Tommy is that over the years I have bought any bearings that I required from shops that specialized in selling bearings and after some(probably) 70 or more years of buying bearings I've never had a problem. As for China taking action... are you insane? Why should they bother? After all they reckon that if some dumb ass is stupid enough to buy cheap bearings why shouldn't they sell them to him. -- Cheers, John B. |
#29
|
|||
|
|||
Carbon component design news
On Friday, March 12, 2021 at 2:56:35 PM UTC-8, John B. wrote:
On Fri, 12 Mar 2021 08:18:24 -0800 (PST), Tom Kunich wrote: On Thursday, March 11, 2021 at 2:57:47 PM UTC-8, John B. wrote: On Thu, 11 Mar 2021 11:39:30 -0800, Jeff Liebermann wrote: On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client..android.app.oneid entity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html Or, perhaps, buy from a proper bearing shop and disdain the cheap bearing being flogged on the Internet :-) John, will you are least attempt to think? Shops are buying from distributors and they are buying from suppliers that could be getting these counterfeit bearings themselves totally innocently. China will not take any action against their people putting these things on the market and it is extremely difficult to discover where in the supply chain they are being switched. The ONLY way we know of this is because major Japanese manufacturers saw an unwarranted drop in demand and investigated it. All I can say Tommy is that over the years I have bought any bearings that I required from shops that specialized in selling bearings and after some(probably) 70 or more years of buying bearings I've never had a problem. As for China taking action... are you insane? Why should they bother? After all they reckon that if some dumb ass is stupid enough to buy cheap bearings why shouldn't they sell them to him. Why am I not surprised that "over the years" you believe is sufficient to excuse the latest problems. Do you also think that because they burned the poppy fields in Afghanistan that there is no longer an opium problem in the USA? |
#30
|
|||
|
|||
Carbon component design news
On Saturday, March 13, 2021 at 3:00:29 PM UTC-8, John B. wrote:
On Sat, 13 Mar 2021 13:35:28 -0800 (PST), Tom Kunich wrote: On Friday, March 12, 2021 at 2:56:35 PM UTC-8, John B. wrote: On Fri, 12 Mar 2021 08:18:24 -0800 (PST), Tom Kunich wrote: On Thursday, March 11, 2021 at 2:57:47 PM UTC-8, John B. wrote: On Thu, 11 Mar 2021 11:39:30 -0800, Jeff Liebermann wrote: On Thu, 11 Mar 2021 09:55:49 -0800 (PST), Tom Kunich wrote: To tell you how bad counterfeiting is getting the Chinese are making bearings with the Japanese names and packaging on them that only the Japanese can tell from the real thing. But with 25% of the life. WBA Bearing Authenticator: https://play.google.com/store/apps/details?id=com.movilizer.client.android.app.oneide ntity.wba https://www.stopfakebearings.com SKF Bearing Authenticate: https://play.google.com/store/apps/details?id=com.skf.authenticate Countermeasures for Counterfeit Bearings: https://www.ntnglobal.com/en/products/aftermarket/countermeasure.html Or, perhaps, buy from a proper bearing shop and disdain the cheap bearing being flogged on the Internet :-) John, will you are least attempt to think? Shops are buying from distributors and they are buying from suppliers that could be getting these counterfeit bearings themselves totally innocently. China will not take any action against their people putting these things on the market and it is extremely difficult to discover where in the supply chain they are being switched. The ONLY way we know of this is because major Japanese manufacturers saw an unwarranted drop in demand and investigated it. All I can say Tommy is that over the years I have bought any bearings that I required from shops that specialized in selling bearings and after some(probably) 70 or more years of buying bearings I've never had a problem. As for China taking action... are you insane? Why should they bother? After all they reckon that if some dumb ass is stupid enough to buy cheap bearings why shouldn't they sell them to him. Why am I not surprised that "over the years" you believe is sufficient to excuse the latest problems. Do you also think that because they burned the poppy fields in Afghanistan that there is no longer an opium problem in the USA? Burned the poppy fields? Where are you coming from. Afghanistan is the largest grower of the Opium poppy in the world with something like 160,000 hectares under cultivation in 2020. That is about 618 square miles by the way. I see another expert who read it all on the Internet. The US military burned the poppy fields of the Taliban and the CIA simply looked the other way for the Afghani government. This is what happens in places like that. Tell us more of what you learned "on the Internet". |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Profile design carbon stryke aerobars problem | [email protected] | Techniques | 6 | March 6th 08 10:13 AM |
Profile design carbon stryke aerobars problem | [email protected] | UK | 6 | March 6th 08 10:13 AM |
FA 100 years of Bicycle Component Accessory Design | AlisEvans | General | 1 | June 7th 07 11:13 PM |
FA 100 Years of Bicycle Component and Accessory Design | AlisEvans | Techniques | 1 | June 5th 07 12:20 AM |
Design News article about bikes | [email protected] | Techniques | 8 | January 14th 05 01:07 PM |