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Bandit hammermill grinder designed for applications that may contain contaminants

A Bandit HM6420 hammermill horizontal grinder
A Bandit HM6420 hammermill horizontal grinder Bandit Industries

Bandit Industries has launched a new horizontal grinder, the HM6420. This 40-inch capacity grinder is designed and manufactured to be an alternative solution for applications that may contain contaminants.

A Caterpillar C32, 1,200 horsepower engine provides the power and torque needed for performance and efficiency. Inside the HM6420 is a 50-inch diameter hammermill that is 66 inches wide. It features a 1375-inch drum skin custom-formed from rolled plate. A 7-inch alloy steel main shaft supports the mill. Each pocket inside the mill is built with A-514 steel.

Equipped with 20 carbide-infused hammer inserts, the HM6420 can withstand tough material fed into the machine. Each holder is attached to the mill because of a quick change pocket system. Each holder recesses into the mill pocket. A top plate is held in by six hex bolts while each hammer insert is attached with two.

A slat-style infeed conveyor is directly driven generating over 18,000 pounds of pulling power. The feed wheel is also directly driven and provides an additional 17,000 pounds of pulling power and 8,650 to 17,300 pounds of downforce when hydraulic pressure is applied. Bandit says that these combinations allow the HM6420 to grind massive quantities of material efficiently and effectively.

A proportional feed system is standard and regulates the feed system from 82 to 132 feet per minute. Bandit says that the HM6420 has one of the fastest feed rates on the market, allowing it to process material quickly. The proportional feed system allows operators to adjust the feed based on the material being processed.

Three screens are located on the top side of the HM6420 mill. A variety of screen sizes are available up to 7 inches to produce various end-product sizes. The top feed wheel moves upward, and a removable screen cradle allows for quick screen set-up changes. All work for screen changing is performed outside of the machine.

An impact detection system is standard and designed to limit damage if a contaminant is struck inside the grinding chamber. Once an impact event is detected, the grinder will idle down, open the gate, disengage the clutch, and reverse the feed.

A 56-inch height adjustable discharge with a stacking height of 16 feet 8 inches is standard. The height of the discharge can be adjusted accommodating various grinding scenarios and situations. The standard wireless remote controls all grinding and tracking functions and features an LCD screen that will display engine coolant temperature, engine oil pressure, engine load percentage, engine RPM, and battery voltage. 

Bandit initially debuted the HM6420 at the CONEXPO-CON/AGG 2023. After the show, Bandit conducted more tests and evaluations and the machine was then demonstrated at Bandit's 40th anniversary event. Final testing of the HM6420 took place in the fourth quarter of 2023 and the machine will begin production in the first quarter of 2024. Bandit will be showcasing the HM6420 in February at the Compost Show in Daytona Beach, Florida.

Company info

6750 Millbrook Road
Remus, MI
US, 49340


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