An interchange list cross referencing other manufacturer's bearing series codes is available on page 110 of the Replacement Guide on the NSK website. Once the user identifies the correct series, he can check the relevant table to verify the dimensions and select the precise designation.
NSK was founded in 1916 and produced the first ball bearings made in Japan. The business grew steadily until the 1960s when the booming automotive industry created a huge demand for bearings. During the 1970s, NSK expanded to start manufacturing operations in the United States, Brazil and England. NSK now produces a full range of bearings and sells them worldwide.