This Timken bearing is a top-performing industrial and scientific product that has exceeded my expectations. Thanks to my knowledge gained in practice, I can confidently say that it is pre-lubricated to ensure optimal performance while minimizing friction... With its outstanding load-bearing capacity and durable construction, it promises to deliver reliable and consistent results. I have been truly impressed by its functionality and ease of use. My only con would BE that it's slightly on the pricier side, but the benefits definitely outweigh the cost. Highly recommended!