Timken 6578 Taper Bearing Cone delivers a precise tapered roller bearing cone with a 4-3/4 inch inner diameter, manufactured in the United States. This New Old Stock Timken part is ideal for restoration and reliable rebuilds of Timken bearing sets. Precision machined to exact specifications, it ensures proper fit, accurate alignment, and smooth power transmission in mechanical systems. The cone is packaged securely in six by six by four inch packaging for safe handling and storage. A genuine Timken component, it preserves the integrity of original assemblies and supports long term durability. Part number 6578; country of origin United States; condition New Old Stock. Suitable for upgrading or completing Timken sets and assemblies in industrial equipment, vintage machinery, or automotive applications. The Timken 6578 cone provides dependable performance and compatibility with existing Timken ranges, making it a trusted choice for professionals and restorers alike.