Peterson R+ Grinder Package


With 10+ years of development, the R+ package combines the very best in engineering and innovative design to equip a typical “high speed” Peterson horizontal grinder into a “medium speed” machine, utilizing the production of a typical high speed grinder, and the protection of a slow-speed shredder.

With performance nearly doubling the output of typical slow speed shredders, R+ equipped Peterson horizontal grinders offer a solution that has high output, and superior machine protection against ungrindable materials.

Typical R+ applications include Municipal Solid Waste (MSW), Construction and Demolition (C&D) debris, chunk wood such as stumps, storm debris, railroad ties, and other materials.

The R+ package uses a specially designed rotor with high and low bits, that turns at half the speed of our standard units. This processes material through a specialized heavy duty grate, with the high and low bits passing through the fingers, providing extensive fracturing surfaces for superior product reduction.

The R+ package utilizes Peterson’s patented Impact Release System, and Impact Cushion System to protect your investment against an ungrindable object, but has additional modifications such as a heavier duty cushion block to prevent nuisance openings, and an upgraded Impact Release System designed to perform in the harsher environment.

Other mods include more space for ground material to exit the machine, and a heavier duty discharge belt.

Already own a Peterson grinder? Your 4700, 5700, or 6700-series machine may be able to be upgraded as a package so you can take on the difficult jobs that you may have passed by before. Likewise, if you no longer need the protection of the R+ package, and your grinder is going into other applications, the R+ specific parts can be removed and replaced with standard units to change the machine back to a standard “high speed” grinder– no other machine on the market can do that!


  • Construction and Demolition (C&D) Recycling

    Construction & Demolition Recycling (C&D) is mixed material associated with construction and demolition. The material could include wood, cardboard, plastic, metal, wire, roofing shingles, concrete and more. By separating and recycling different materials it reduces landfill use and tipping fees, while also producing value-added products.
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  • Municipal Solid Waste (MSW) Recycling

    Peterson horizontal grinders with the R+ package are an ideal tool for MSW reduction. R+ equipped Peterson horizontal grinders turn the rotor at a slower speed and have heavier duty internal components to handle the tramp metal often found in this application.
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  • Railroad Tie Recycling

    The creosote treated railroad ties are a valuable energy source, once they have been broken down into a manageable and consistent size.
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  • Natural Disaster Cleanup

    Peterson horizontal grinders are ideal for storm debris cleanup. Our horizontal grinder design allows for easy feeding of odd-shaped material, without the dangers, found in typical tub grinder designs.
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