OEM Gribaldi Salvia roller bearing, located on the main crankshaft of the power head, see position 15 in the exploded view! We sell many replacement parts for the most manufacturers of tillers, finish mowers, spreaders, 3-point hitch hay tedders and sickle bar mowers. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often. Part Number: One each 8131 We stock a wide variety of replacement parts for Agricultural Equipment please contact us if you have any questions or if you would like more information.