NEW 2024 Baumalight IP24 PTO Stump Grinder Recommended 20 - 45 HP Tractor Must Have Hydrostatic Drive Rotor Size 24" Cutting Wheel Speed 540 RPM Weight 350lbs The 1P24 PTO stump grinder is designed for small tractors equipped with hydrostatic drive and Category 1 3PH. This tractor mounted stump grinder model allows you to grind small and midsized stumps. Ideal for tractors with no hydraulic remotes! Tractor must have a hydraulic drive.