The McCormick 1420852M1 is a high-quality belt tensioner roller designed for various McCormick CX, MC, and MTX series tractors. This essential component maintains proper tension on engine belts, preventing slippage and ensuring efficient power transmission to critical engine accessories. With an outer diameter of 70mm, an inner diameter of 17mm, and a width of 30mm, this roller is engineered for durability and reliable performance in demanding agricultural applications. It is also cross-referenced with Massey Ferguson part numbers 3617309M1, 3617309M2, 3617309M3, and 3617309M4.