This is an OEM part sourced directly from the manufacturer. The ball bearing is commonly found in saws, shapers, and drill presses from Powermatic and jet. This part is made of metal, and may be found in various locations in the machine, depending on model. Please be aware that there are different ball bearings used in the machine. Re...Read morefer to the parts diagram to be sure of ordering the correct part. You may require an Allen wrench or screwdriver when replacing this item. The ball bearing is available as an individual replacement part.