PR6600 Primary Reducer

SSI’s PRI-MAX® PR6600 is a heavy duty, low-speed, high-torque industrial primary shredder designed for high capacity volume reduction of the toughest materials considered by others to be “non-shreddable”.

SSI’s PRI-MAX® PR6600 primary reducer is more than a heavy duty shredder. It combines ripping and shearing technologies to shred, tear, pierce, chop, split, flatten, crush, break and reduce materials. The unique cutter profiles and patented open cutting table design are key to achieving high capacity reduction of virtually any material. With processing rates from 60 to 150 tons per hour, SSI’s PRI-MAX® PR6600 is one of the most comprehensive multi-material reducers in the world.

PRI-MAX<sup>®</sup> PR6600 Primary Reducer
PRI-MAX<sup>®</sup> PR6600 Primary Reducer System PRI-MAX<sup>®</sup> Cutters

Typical Applications for PRI-MAX® PR6600

  • Mixed & Organic Waste

    Extremely high volume mixed MSW, land clearing, stumps, etc.

  • MSW / RDF

    SSI’s highest capacity machine for bag opening, high volume preconditioning for MRFs, tramp metal liberation, mixed material processing, etc.

  • Paper

    Cores, bales, slab, etc.

  • Metals

    Appliances, very high volume aluminum bales, sheet, bulky ferrous formed parts, etc.

  • Rendering

    Animal carcasses and parts, etc. 

  • Wood

    High capacity C&D, white wood, pallets, spools, crates, land clearing residuals, railroad ties of all sizes, etc. 

  • Demolition Waste

    High volume C&D processor - tiles, wood, flooring, etc

  • Fibers

    Foam, carpet, textiles, etc.

  • Landfill

    Cell reclamation, densification, etc.

  • Baled & Bulky Materials

    Baled metals, furniture, appliances, spools and crates, etc.



PRI-MAX® Reducers process almost anything at rates up to 80 tons per hour.


Large hoppers designed to be bulk fed by heavy equipment.


Independent, bi-directional shaft rotation and aggressive cutter design allow the PRI-MAX® to process material in both forward and reverse, which increasing production and minimizes bridging or build-up around the shafts.


Heavy duty, open-grate cutting table and strategic cutter placement ensure that abrasives including aggregate, sand, soils and metal fragments will fall directly through the machine, reducing wear and operating costs.


PRI-MAX® machines are able to process a wide range of loose and baled metals. Tramp metal contaminants in a mixed material stream do not create downtime or costly repairs.


Low-speed, hydraulic drive technology provides an environmentally friendly operation with low noise, low dust, minimized fines, high on-line reliability and low maintenance.

Shredder Model:

PRI-MAX®  PR6600

Drive Hydraulic
Production Rate 60 - 150 tons per hour
Infeed Opening Dimensions 3,429 x 4,267 mm (135 x 168 in) - w/standard hopper
Infeed Capacity* 20.3 m3 (26.5 yd3) - w/standard hopper
Active Cutting Zone Dimensions 2,350 x 3,300 mm (92½ x 130 in)
Active Cutting Zone Area 7.75 m3 (83.5 yd3)
Hydraulic Drive Type Direct
Hydraulic System Closed loop, load-sensing, with smart torque package
Number of Shafts 2 (independently driven, bi-directional)
Cutters Per Shaft 7 / 9 / 12
Number of Hooks Per Cutter 6
Cutter Thickness 76 mm (3 in)
Electric Power Rating 373 kW (500 hp)

* Extended hoppers available for increased infeed capacity. The capacities stated are guidelines and not guaranteed values. Actual capacity may vary depending on your specific material, number of cutters, feed method and other operational variables.

Note: Illustrations, specifications and descriptions presented reflect standard product at time of publication and are subject to change without notice. Dimensions are approximate. Photographs may include optional equipment and accessories. SSI offers compactors, balers, granulators, conveyors and classifiers as well as specialized motors, stands, hoppers, and mobile configurations. Consult factory to discuss your processing needs.

PRI-MAX® PR-6600 Primary Reducer

Shredder Model:

PRI-MAX®  PR6600

Infeed Opening Dimensions 3,429 x 4,267 mm (135 x 168 in) - w/standard hopper
Active Cutting Zone Dimensions 2,350 x 3,300 mm (92½ x 130 in)
Infeed Capacity* 20.3m3 (26.5 yd3) - with standard hopper