I replaced one particular pulley bearing with SKF 6302-2RS-C3 and one other that has a Nachi 6302-2NSE-C3. The Nachi inner race is a little bit broader and you might not will need the washer, but I made use of a single in any case. I bought two diverse bearings only https://cypriotdirectory.com/listings13191031/new-step-by-step-map-for-full-face-threading-in-rocklin