Excavator mounted Stump Grinder - GXM750 The GXM750 excavator stump grinder is designed with high performance in mind for 7 to 18 ton excavators equipped with 8 to 40 gallons per minute of flow. It Features 20 green carbide teeth packed in groups of 5. The Wearsharp® Teeth can be rotated for a fresh edge up to three times, letting you grind stumps 3 times longer. Heavy tooth population makes finer mulch and allows much smoother operation, while the blast shield with double row chain curtain ensures debris stays put. The 24" rotor is powered by a bent axis a piston motor, which provides ample stump grinding in virtually any location your excavator can reach. The GXM750 Baumalight stump grinder is offered with three motor options to best match your flow; be sure to check out the Stump Cutting Times charts below to see how fast you can grind stumps with the flow of your excavator.