Primary Wear Parts, a subsidiary of Primary Machinery, offers a full spectrum of grinder wear parts for either your tub or horizontal grinder inserts tips and hammers, screens (grates), bolts, nuts, belts, etc. Our robotically welded carbide grinder inserts are the longest lasting and most durable in the industry. We have the ability to custom cut and burn any size and shape of screen to meet your individual product requirements. In addition to the grinder wear parts, we also offer a full line of chipper knives for everything from brush chippers to large industrial whole tree flail chippers. Have a trommel screen? We can help! We also handle the wire mesh cloth for your trommel or shaker deck screen. Bark Blower truck? We have you covered. We also deal in bark blower truck hose.