Extended inner ring ball bearings are also called extended inner ring bearings or wide inner ring bearings,it is ball bearings with a extended inner ring,they mean the width of inner ring is longer than the width of outer ring in extended inner ring bearings, they are designed for special applications. Usually, the extended inner ring ball bearings or wide inner ring bearings are specially designed to replace the need for additional locational flange in applications. Runstar has a full dimention of Stainless steel extended iInner ring ball bearings for choice.The stainless steel material can be 440(9Cr18),420(9Cr13) or 316 in Runstar. Compared with ordinary extended inner ring ball bearings with chrome steel,stainless steel extended inner ring ball bearings can keep from corrosion caused by some acids or moisture,and stainless steel extended inner ring ball bearings have obvious advantages of stable operation, low noise, low magnet, wide application, excellent anti-corrosion and anti-rust properties. There are three types for extended inner ring ball bearings in Runstar,they are open type,with shields or with rubber seals.The grade can be from ABEC-1 to ABEC-7 at request. They can be widely used in the fields of medical equipment, cryogenic engineering, optical instruments, high-speed machine tools, high-speed motors, printing machinery, food processing machinery etcs.