What is non-standard bearing?Non-standard bearings, is not in line with the national standards Compatible with the size of the bearings, also known as the overall size of the national standard is different from the provisions of all bearings. Its main features are low degree of versatility, many Compatible with special equipment, special occasions, small batch, new research and development equipment trial products accounted Compatible with the majority, but because of its not large-scale, batch production, production enterprises are not many, the cost is high, the price is more expensive.SPECIAL NOTEDear friend, Please read this email before your purchase.You are about to buy non-standard bearings,Non-standard bearings The most important thing is to confirm that the dimensions meet your requirments,Our non-standard bearing sizes are marked in the picture.Please check!The type of seal is mainly 2RS, some will be different, maybe OPEN or ZZ, this can not be guaranteed.If the seal is important to you, please give us a message to confirm.Non-standard bearing because of the difficulty of size processing,the quality of nomal ABEC-1.Non-standard bearings are used in special places, are custom-made Compatible with customers.Hope is also helpful to you.