New Bandit HM6420 Hammermill Horizontal Grinder Offers Speedy Feed Rates

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Bandit’s HM6420 is available with screens up to 7 inches and includes an impact detection system that shuts the system down gently if a contaminant is struck inside the grinding chamber. (Photo courtesy of Bandit.)

The new Bandit HM6420 tracked horizontal grinder is a heavy-duty workhorse. It features a 50-inch (127-centimeter)-diameter by 66-in. (168-cm)-wide hammermill that incorporates 1.75-in. (4.4-cm) drum skin formed from rolled plate. The machine’s Cat C32 engine is rated for 1,200 horsepower (895 kilowatts). Bandit showcased the HM6420 at the recent Compost2024 trade show in Daytona Beach, Florida.

Bandit says the HM6420 is well-suited for grinding material that may contain contaminants, thanks to its standard impact detection system that idles the grinder down and disengages the clutch if it detects an impact event.

Bandit’s HM6420 Hammers It

The HM6420 joins a Bandit lineup of horizontal grinders comprising machines designed to either “cut it,” “chip it,” or “hammer it.” This latest “hammer it” solution has a 40- by 64-in. (102- by 163-cm)-wide mill opening and a 7-in. (17.8-cm) main shaft that Bandit constructs of alloy steel and tests ultrasonically. The grinder’s pockets feature high-strength A-514 steel construction.

The HM6420 also puts to work 20 carbide-infused hammer inserts that Bandit says can stand up to the toughest material. The company uses a patent-pending quick-change pocket system to attach the holders to the mill, and each holder recesses into the mill pocket to enhance durability.

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Bandit says the HM6420 has one of the market’s fastest feed rates at 82 to 132 feet per minute. (Photo courtesy of Bandit.)

A Fast Feed Rate

The HM6420’s combination of a directly driven double-slat, track-type steel infeed conveyor, which measures 16 feet (4.9 meters) long by 64 in. (163 cm) wide, and a directly driven 64.75-in. (164-cm)-wide floating feed wheel allows it to grind huge quantities of material at once. The conveyor can generate over 18,000 pounds (8,165 kilograms) of pulling power, and the feed wheel adds another 17,000 lbs (7,711 kg) of pulling power and 8,650 to 17,300 lbs (3,924 to 7,847 kg) of downforce when using hydraulic pressure.

Bandit says the HM6420 has one of the market’s fastest feed rates at 82 to 132 ft (25 to 40 m) per minute. The grinder’s proportional feed system lets operators adjust the feed according to the material they’re processing, and they can do so using the machine’s radio remote with tether backup. The machine has a 56-in. (142-cm) dual-discharge system with a 16.6-ft (5.1-m) stacking height.

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Source: Bandit