BURNSVILLE, Minn. – The new UltraGrinder by ArborWolf, Burnsville, Minnesota, has a radial piston motor for maximum productivity, a cushioned parallelogram mechanism for drivetrain protection and teeth on both sides of the cutting wheel to allow for dual-direction cutting. It also features proven Greenteeth technology as standard equipment.
The UltraGrinder delivers the productivity of a dedicated stump grinder but at around one-fourth of the initial cost. It is currently available for low- and high-flow skid steers from 16-45 gallons per minute (GPM), and versions for mini skid steers and mini excavators will be available soon.
“Our design makes it incredibly efficient while keeping it as simple as possible,” said Jerry Holman, ArborWolf president and product development manager.
Plug-N-Grind
ArborWolf created the UltraGrinder for a range of users, including professional tree and tree-maintenance contractors and companies, landscapers, farmers, ranchers and landowners. The UltraGrinder’s simple connection and operation also make it ideal for the rental industry.
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. Due to the way the UltraGrinder operates, those functions are not needed.
“If you can run a skid steer, you can efficiently and safely grind with an UltraGrinder,” Holman said. “All you need to do is plug in three hoses and go cut wood.”
Cushioned parallelogram mechanism
At the center of the UltraGrinder’s efficiency, productivity and safety is the cushioned parallelogram mechanism, which alleviates excess pressure on the cutting wheel, protects the drivetrain and extends product lifecycle.
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 three inches of cushioned movement for the UltraGrinder cutting head and to keep it 90 degrees to the cut at all times.
Dual-direction cutting
The UltraGrinder also features teeth on both sides of the cutting wheel, which is an ArborWolf exclusive that allows operators to cut safely in both forward and reverse directions through a stump. The cushioned parallelogram mechanism, which cushions in both directions, makes cutting both ways possible.
With an UltraGrinder, the operator drives up to the stump, positions the attachment, drives forward and cuts. Once that cut is made, the operator simply lowers the unit several inches and backs up, making another cut in the process. With other skid steer stump grinder attachments, the operator has to lift the attachment, back up, lower the unit, reposition it and drive forward again to make another cut.
More than 90 percent efficient
Operators can grind more stumps in less time with the UltraGrinder thanks to the radial piston motor. The UltraGrinder is able to channel more of a machine’s power into the cutting wheel, and the result is an attachment that is 92-95 percent efficient. For example, with a 50-horsepower machine, the UltraGrinder is able to channel 46- 47.5 HP to the cutting wheel.
The cutting wheel also spins at 1,000 rpms. The high rotation rate translates into fast cutting and smooth operation because the potential for wheel grabbing or sudden stops is minimized.
“The UltraGrinder is easy on, easy off and very small so it’s easy to carry with you,” Holman said.
The UltraGrinder delivers the productivity of a dedicated stump grinder but at around one-fourth of the initial cost. It is currently available for low- and high-flow skid steers from 16-45 gallons per minute (GPM), and versions for mini skid steers and mini excavators will be available soon.
“Our design makes it incredibly efficient while keeping it as simple as possible,” said Jerry Holman, ArborWolf president and product development manager.
Plug-N-Grind
ArborWolf created the UltraGrinder for a range of users, including professional tree and tree-maintenance contractors and companies, landscapers, farmers, ranchers and landowners. The UltraGrinder’s simple connection and operation also make it ideal for the rental industry.
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. Due to the way the UltraGrinder operates, those functions are not needed.
“If you can run a skid steer, you can efficiently and safely grind with an UltraGrinder,” Holman said. “All you need to do is plug in three hoses and go cut wood.”
Cushioned parallelogram mechanism
At the center of the UltraGrinder’s efficiency, productivity and safety is the cushioned parallelogram mechanism, which alleviates excess pressure on the cutting wheel, protects the drivetrain and extends product lifecycle.
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 three inches of cushioned movement for the UltraGrinder cutting head and to keep it 90 degrees to the cut at all times.
Dual-direction cutting
The UltraGrinder also features teeth on both sides of the cutting wheel, which is an ArborWolf exclusive that allows operators to cut safely in both forward and reverse directions through a stump. The cushioned parallelogram mechanism, which cushions in both directions, makes cutting both ways possible.
With an UltraGrinder, the operator drives up to the stump, positions the attachment, drives forward and cuts. Once that cut is made, the operator simply lowers the unit several inches and backs up, making another cut in the process. With other skid steer stump grinder attachments, the operator has to lift the attachment, back up, lower the unit, reposition it and drive forward again to make another cut.
More than 90 percent efficient
Operators can grind more stumps in less time with the UltraGrinder thanks to the radial piston motor. The UltraGrinder is able to channel more of a machine’s power into the cutting wheel, and the result is an attachment that is 92-95 percent efficient. For example, with a 50-horsepower machine, the UltraGrinder is able to channel 46- 47.5 HP to the cutting wheel.
The cutting wheel also spins at 1,000 rpms. The high rotation rate translates into fast cutting and smooth operation because the potential for wheel grabbing or sudden stops is minimized.
“The UltraGrinder is easy on, easy off and very small so it’s easy to carry with you,” Holman said.