ArborWolf released its new UltraGrinder, a stump grinder attachment featuring a radial piston motor, a cushioned parallelogram mechanism and teeth on both sides of the cutting wheel.

The UltraGrinder is currently available for low- and high-flow skid-steers from 16-45 gallons per minute, with versions for mini-skid-steers and mini excavators will be available soon.

“This the most productive attachment-style stump grinder in the industry,” said ArborWolf President and Product Development Manager Jerry Holman. “Our design makes it incredibly efficient while keeping it as simple as possible.”

The UltraGrinder performs all the functions of other stump grinder attachments without any auxiliary or electrical controls, harnesses or circuits for raising and lowering, swinging or telescoping, the company said.

The UltraGrinder’s cushioned parallelogram mechanism is designed to alleviate excess pressure on the cutting wheel, protect the drivetrain and extend the product’s life.

The parallelogram mechanism consists of a rubber torsion element and four heavy-duty link arms that connect the cutting head to the mount frame. When an operator begins to cut into a stump and applies pressure against the cutting wheel, the four link arms move against the rubber torsion element in unison to provide up to 3 inches of cushioned movement for the UltraGrinder cutting head and to keep it 90 degrees to the cut at all times. The cutting wheel also spins at 1,000 rpm.

The UltraGrinder also features teeth on both sides of the cutting wheel, which allows operators to cut safely in forward and reverse through a stump. The angled orientation of the teeth in relation to the stump results in a shallower cut.

Photo: ArborWolf