Rotochopper replaceable mount rotorRotochopper replaceable mount rotor

Replaceable Mount Rotor

Our patented Replaceable Mount Rotor simplifies maintenance and increases versatility by allowing operators to easily exchange rotor tooth mounts.

Rotochopper replaceable mount rotor systemRotochopper replaceable mount rotor system

Simple Yet Solid

Each mount locks into the rotor drum with two bolts—no bushings, lock collars, or heavy shafts, and no need for specialized tools like rod pullers. A unique mounting design transfers impact stress to the rotor drum, minimizing bolt stress. Each mount is independently secured, so if one mount is damaged, only one needs to be replaced.

Rotochopper replaceable mount rotor with weld-on rakersRotochopper replaceable mount rotor with weld-on rakers

Unmatched Versatility

This exclusive rotor opens more market opportunities by allowing operators to use different mounts, including our KeyKnife chipper mounts. The replaceable mount rotor lets you switch from grinding to chipping without swapping rotors or assembling a complex overlay onto the rotor drum.

Equipment featuring this technology


  • UP TO 1050HP
  • 65-95,000lbs
  • 66" x 36" Throat Opening
  • Diesel Engine

Our largest and most versatile grinder, the B-66 offers high volume precision grinding capacity for a broad range of feedstocks.

Full Machine Details

B-66 EGrinder

  • UP TO 1,000HP
  • 59,000lbs
  • 66" x 36" Throat Opening
  • Electric Motor

The B-66 E electric grinder offers unparalleled efficiency and uptime for facilities that need high volumes of engineered fiber products.

Full Machine Details


  • UP TO 755HP
  • 57,000lbs
  • 66" x 26" Throat Opening
  • Diesel Engine

The FP-66 offers high-volume grinding features for companies that need “Perfect In One Pass” efficiency with mid-range horsepower.

Full Machine Details
B-66 wood grinder grinding logsB-66 wood grinder grinding logs

“My Rotochopper equipment has taken my business to levels I never imagined. I’m the luckiest guy in the world to have a company like Rotochopper in my backyard.”

—Trevor Hansen, Hansen Companies of Spicer