Review on 6203 2NSE Sealed Bearings - 17X40X12 Dimensions by David Dreher

Fake! (3 bearings, same QR code). Use the WBA Bearing Authenticator app found on Google Play and approved by all major bearing manufacturers. Each bearing must have a unique QR code that is checked against the manufacturer's database. All 3 of my bearings had the SAME (must be unique/different) poorly printed QR code, these were not legitimate manufacturer codes. There are no markings on the inner and outer rings. only with rubber seal. It seems to me that someone bought some CHINESE bearings and put the Nachi brand on them. A good fake from China, but the QR code always wins. Do your homework. scan the QR code to confirm.