Model 865 Vertical Feed Mixer

Download Vertical Feed Mixer Brochure

Model 865 is a twin auger vertical feed mixer with a mixing capacity of 860 cu. ft and it can hold a maximum load with a heavy ration up to 21,500 lbs. The side discharge or front center flat sliding conveyor feed out of either side. Fixed or adjustable incline conveyors are optional. Twin matching single flighted augers with several knife options are available for faster mixing and processing of long fiber material. This unit is available in either truck, trailer or stationary. Its low profile allows several types of loaders to input feed without clearance concerns. The trailer model can be operated with a 110 hp or larger tractor. Twin screws are powered by a reliable, low maintenance PTO-driven, planetary gearbox. This feed mixer is for medium, to large sized dairy, cow/calf, stocker and heifer operations.

Roto-Mix Vertical Mixer Over Pit


Feed rises 42" per revolution to mix twice as fast!

42" every 3.3 seconds at 18 revolutions per minute!

1505 Veertical Mixer865 Vertical Mixer from Front

Inclined Conveyor

745/865 models have inclined conveyor with optional 14" spout with magnets to match your feeding needs.

Two Speed Gearbox

745/865 models have two-speed gearbox for slow speed mixing and high RPM for better cleanout. Optional hydraulic shifter allows operator to change between low and high gear from tractor seat.

Vertical Dimensional Drawing


  Auger Screws Twin
  Auger Flighting Single
  Empty weight, trailer models, lb. (kg) 15,200 (6895)
  Weight, 8" end cap ext., lb. (kg) 150 (68)
A Trailer tub length, in. (cm) 226 (574)
B Trailer overall length, in. (cm) 283 (719)
C Trailer tub width, in. (cm) 111 (282)
D Trailer overall height, in. (cm) 115 (292)
E Trailer discharge height, in. (cm) 27–49 (69–124)
F Trailer outside tread width (tires), in. (cm) 110 (279)
G Truck tub length, in. (cm) 226 (574)
H Truck behind cab to end of tub, in. (cm) 267 (678)
I Truck tub width, in. (cm) 111 (282)
J Overall height with 38" truck frame, in. (cm) 131 (333)
K Discharge height with 38" truck frame, in. (cm) 45 (114)
  Transport width, in. (cm) 110.5 (281)
  Loading height, trailers, in. (cm) 114.5 (291)
  Hydraulic drive system NA
  Auto-Mix drive NA
  PTO speed, rpm 1,000
  Trailer recommended PTO horsepower (kilowatts) 135 (101)
  Truck recommended engine horsepower (kilowatts) 250 (186)
  Tires size, trailers, in. (cm) 255/70R 22.5 36 OD (91)
  Hubs, lb. (kg) 10 bolt 20,000 (9072)
  Conveyor width, conveyor models, in. (cm) 42 (107)
  Maximum load with a hay ration by weight, lb. (kg) 15,480 (7021)
  Maximum load with a heavy ration by weight, lb. (kg) 21,500 (9752)
  Mixing capacity* cu. ft. (m³) 860 (24.4)
  Discharge magnets Optional
  Screw speeds at 1,000-rpm pto 27/low 40/high

All dimensions and specifications are approximate and subject to change without notice.
*Extension capacity
‡Minimum tractor PTO 180 hp (210 Engine HP–156 [kw] or higher).