Progressive compost technicians know once a proper recipe has been selected, mixing the ingredients is essential to ensure rapid decomposition and quality compost. One of the major benefits of mixing is to uniformly distribute nutrients and microorganisms throughout the compost pile.
The ROTO–MIX design combines gentle tumbling with quick complete mixing to save time and improve your bottom line. The ROTO–MIX conveyor can be used to build windrows or static piles. ROTO–MIX has a complete line of Industrial Mixers—one that will meet your needs today and tomorrow.


The rotor design lifts ingredients up to the side augers that move ingredients end-to-end for a fast thorough mix. Unlike the wedge point on other brands, our rotor lifts the material past the wedging point of the lower side auger, giving you a fluffier mixture while lowering power requirements.
Total movement of material in the mixing chamber eliminates dead spots common in conventional auger mixers.
patent pending
The ROTO–MIX mixing system carries US Patent Nos. 4,506,990—4,597,672—4,741,625 and CANADA Patent No. 1,249,262—other foreign patents pending.

For fast, accurate compost application–great for highway projects, housing developments, erosion control or anywhere an even compost bed is required.


patent pending
The single lever latch makes inspection easy and desirable compared to other little latches or hardware.
Allows quick lubrication from a single point. Heavy-duty drive assembly runs in an enclosed oil bath.
A lower center of gravity makes for a more stable unit when making windrows and less shock load when cornering.
The patented rotor lifts ingredients up to the side augers that move the ingredients from end-to-end for thorough mixing. The lifting action of the rotor eliminates wedging of the compost under the lower auger. Patented tumbling design reduces mixing power requirements.
Spline shafts eliminate shearing of keys and gaulding of shafts. Heavy-duty chains and bearings extend life and reduce downtime.
3⁄4", 5⁄8" and 1⁄2" flighting available for lower auger to extend life. Top augers available in 3⁄8" and 1⁄2" flighting.
The flared side allows ingredients to tumble out of the rotor speeding up the mixing action and reducing the chance for ingredients to get trapped inside the rotor.
Sturdy box frame construction with rectangular tubing for increased stability and weighing accuracy. Scale frame assembly allows scale frame to float independent of truck frame.
The ROTO–MIX system protects particle size with less grinding or compaction. Particle size and porosity are critical because it determines how well air can enter and diffuse into the composting mass.
With better air introduction and distribution, ROTO–MIX consistently produces quality compost by lifting the ingredients past the lower auger’s wedge point, resulting in a fluffier mixture that starts to compost faster.
Our thorough mixing action eliminates dead spots, auger tunneling and corner pile-up giving a consistent balance of nutrients and microorganisms from the first yard of compost to the last.
Mixes all types of compost ingredients, solid waste, yard waste, food waste, sludge and amendments, animal manure and a number of others with consistency day after day.
Load-cell mounting comes standard with ROTO–MIX ball and socket type tie bars to connect the mixer to the frame. This feature eliminates side and end movement on the load cells, which allow for scale dependability and accuracy.
Optional hydraulic folding conveyor up to 120" long gives you ability to build windrows, static piles or load truck fast and efficiently. We also have a portable stand-alone conveyor for stationary models.
The forward pitch rotor design, adjustable UHMW wiper blades, and the rotation of the lower auger quickly and efficiently cleans out the mixing chamber.
Short wheel base allows for easy maneuverability and tight turning radius.

The extra heavy-duty drive assembly runs in an oil bath.
A grease bank allows easy access to all drive assembly bearings.
Lower auger and rotor have double tapered roller bearings and both augers are flanged for easy removal over the top.
A low center of gravity puts less shock load on the axle and springs when cornering or driving over rough terrain.
Rotor is equipped with spring tension bars to relieve pressure and eliminate wedging of bulky materials. UHMW wiper blades are adjustable for a fast, effective clean-out.
Extra heavy wall auger tubes give maximum life and less maintenance.
Patented tumbling action allows easier pulling mixer action, reducing the load on the transmission, PTO, and drive line.
ROTO–MIX units have two automotive type drive shafts from a truck PTO to one heavy-duty gear reducer
The rotor design keeps the lower side auger at full capacity, giving quick clean-out.

Only two augers with one-half to two-thirds less flighting than most conventional auger mixers.
The patented rotor lifts material up to the side augers that move the material from end-to-end for thorough mixing. The lifting action of the rotor eliminates wedging of bulky materials under the lower auger.

Load precise rations without straining to see the display.
A transceiver (RF 900) connected to an EZ Indicator in the cab communicates via radio frequency to another RF 900 on the loader, which is connected to a Wireless RD 1000 Remote Display. With 16 different channels to select from, this is an ideal application for multi-unit installation since you no longer need a remote on each truck.

Transmitter / Receiver (TR optional)—Radio controlled TR lets you zero and select net or gross from up to 100 ft. away.
Get more for your money with the EZ II line of indicators. Call ROTO–MIX for information on the complete line and related products including stainless steel load sensors.



You’ll find fewer bearings and less moving parts overall than conventional auger mixers.
It all adds up to fewer repairs and a reduced cost for maintenance.

| Model Description | 1670 | 2300 | 2670 | 3410 |
|---|---|---|---|---|
| Maximum Mixing Capacity (cu. yd.) *** | 16.7 | 23 | 27.8 | 34.1 |
| Maximum Mixing Load (lb) *** | 17,500 | 17,500 | 20,500 | 26,100 |
| Unit Weight (lb) Truck Installed | 13,650 | 16,380 | 19,975 | 21,685 |
| Unit Weight (lb) Trailer w/Tires | 15,400 | 18,130 | 22,125 | 25,085 |
| Unit Weight (lb) Stationary w/o Motor | 13,360 | 16,090 | 18,655 | 20,485 |
| Power Requirement (hp) Truck | 230 | 230 | 230 | 250 |
| Power Requirement (hp) Trailer | 110 | 120 | 130 | 140 |
| Power Requirement (hp) Stationary | 50 | 50 | 50 | 40 / 75 |
| Mixer Length (in) | 170 | 218 | 223 | 232 |
| Mixing Chamber Length (in) | 144 | 192 | 192 | 216 |
| Length Hitch to Tire Center (in) | 171 | 182 | 185 1⁄2 | 193 |
| Length Cab to Axle Center (in) | 108 | 138 | 144 | 156 |
| Overall Length–Trailer (in) | 226 | 278 | 278 | 303 |
| Overall Length–Truck (cab to bumper) (in) | 181 | 229 | 235 | 262 |
| Overall Length–Stationary (in) | 182 1⁄2 | 230 1⁄2 | 234 | 250 |
| Overall Width–Folded Spout (in) | 112 | 112 | 115 | 122 3⁄4 |
| Overall Width–Stationary (in) | 106 1⁄2 | 106 1⁄2 | 110 | 118 3⁄4 |
| Overall Width–Mixer Only (in) | 106 1⁄2 | 106 1⁄2 | 110 | 118 3⁄4 |
| Overall Width–Optional Conveyor (in) | 140 | 140 | 145 | 172 |
| Overall Height–Trailer* (in) | 110 1⁄2 | 110 1⁄2 | 121 | 130 |
| Overall Height Mixer / Truck Frame / Ht. (in) | 116 / 36 | 116 / 36 | 119 / 36 | 135 / 36 |
| Overall Height Mixer–Stationary (in) | 85 1⁄2 | 85 1⁄2 | 89 1⁄2 | 101 3⁄4 |
| Overall Width of Tires–Trailer (in) | 94 | 94 | 96 | 96 |
| Overall Width of Tires–Truck (in) | 96 | 96 | 96 | 96 |
| Discharge Hinge Height Trailer (in) | 45 | 45 | 51 | 59 |
| Discharge Hinge Height Truck (in) | 51 | 51 | 52 | 56 |
| Discharge Width (in) | 46 1⁄2 | 46 1⁄2 | 46 1⁄2 | 46 1⁄2 |
| Thickness–Bottoms (in) ** | 3⁄8 | 3⁄8 | 3⁄8 | 3⁄8 |
| Thickness–End Plates (in) | 1⁄4 | 1⁄4 | 1⁄4 | 1⁄4 |
| Thickness–Sides | 7 ga | 7 ga | 7 ga | 7 ga |
| Top Auger Flight (in) | 3⁄8 x 24 OD | 3⁄8 x 24 OD | 3⁄8 x 24 OD | 3⁄8 x 24 OD |
| Lower Auger Flight (in) | 3⁄4, 1⁄2 x 24 OD | 3⁄4, 1⁄2 x 24 OD | 3⁄4, 1⁄2 x 24 OD | 3⁄4, 1⁄2 x 24 OD |
| Rotor Diameter (in) | 72 1⁄2 | 72 1⁄2 | 76 1⁄2 | 84 1⁄2 |
| Rotor Bar Options | 5,6 | 5,6 | 5,6 | 5,6 |
| Drive Chain–Auger Drive ** | #80H-100-120 | #80H-100-120 | #80H-100-120 | Hydrostatic |
| Drive Chain–Rotor Drive | #140 | #140 | #120-(2) | #180 |
*Tire size may vary in height. Unit weight, listed most common option packages. All dimensions and specifications are subject to change without notice.
**Other options available.
***Maximum mixer capacity can be reached by volume or weight. By volume, each rotor bar should always be visible at the peak of the rotor cycle. By weight, when maximum load capacity is reached.