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Virnig V70 Open Front Rotary Brush Cutter

Virnig V70 Open Front Rotary Brush Cutter

Capable of cutting up to 8″ trees, this high performance brush cutter provides faster blade tip speed, quick spin up, and rapid recovery.

  • BENT-AXIS PISTON MOTOR WITH RELIEF VALVES ENSURES RAPID FLYWHEEL SPIN UP & RECOVERY, REACHING FULL SPEED IN 13 SECONDS
  • STANDARD MOTOR GUARD & SPINDLE GUARD
  • CIRCULAR FLYWHEEL WITH 4 DOUBLE-SIDED BLADES BOUNCES OFF STUMPS
  • REPLACEABLE AR400 FRONT SKID SHOES & BOLT-ON AR400 BOTTOM DECK RUNNERS
  • SPINDLE LOW PRESSURE OIL VENT SAFEGUARDS BEARING ADAPTER SEALS IF MOTOR SEALS FAIL
  • CASE DRAIN CONNECTION INDICATOR PROVIDES VISUAL CONFIRMATION OF FUNCTIONING CASE DRAIN

DO NOT OPERATE CUTTER WITHOUT A SHATTERPROOF CAB ON LOADER.

NO HYDRAULIC BRAKING – FLYWHEEL MAY TAKE MINUTES TO COME TO A COMPLETE STOP.

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Specifications
ModelPRC72PRC78PRC84
Cut Width72.0 in / 1829 mm78.0 in / 1981 mm84.0 in / 2134 mm
Overall Width78.0 in / 1981 mm84.0 in / 2134 mm90.0 in / 2286 mm
Overall Height20.1 in / 511 mm
Overall Depth80.3 in / 2040 mm86.3 in / 2192 mm92.3 in / 2344 mm
Deck Height8.3 in / 211 mm
Push Bar Height23.4 in / 594 mm
Cut Height2.3 in / 58 mm
Cutting Capacity, Diameter8.0 in / 203 mm
Number of Teeth (Optional)202428
Deck Thickness¹: Top & Side0.25 & 0.25 in / 6.4 & 6.4 mm
Recommended Flow Rate30 - 50 GPM / 114 - 190 L/min
Max Operating Pressure4500 PSI / 31.0 MPa
Approximate Weight2155 lb / 978 kg2315 lb / 1050 kg2490 lb / 1130 kg
Recommended Loader CapacityGreater than 2200 lb / 998 kg

¹ Deck material is Grade 50 Plate (50,000 PSI / 345 MPa minimum yield strength).

Blade Tip Speeds (FPM / m/min)

High Flow Models (30–39 GPM / 114–148 L/min)
Model30 GPM Minimum39 GPM Maximum
PRC72-HF3913,465 FPM / 68.43 m/s17,505 FPM / 88.91 m/s
PRC78-HF3914,580 FPM / 74.48 m/s18,955 FPM / 96.25 m/s
PRC84-HF3915,695 FPM / 79.82 m/s20,405 FPM / 103.54 m/s
High Flow Models (39–50 GPM / 148–190 L/min)
Model39 GPM Minimum50 GPM Maximum
PRC72-HF5015,530 FPM / 78.92 m/s19,910 FPM / 101.40 m/s
PRC78-HF5016,820 FPM / 85.46 m/s21,560 FPM / 109.73 m/s
PRC84-HF5018,105 FPM / 91.71 m/s23,210 FPM / 117.68 m/s

Flow rates are given in gallons per minute (GPM) / litres per minute (L/min), and blade tip speeds are shown in feet per minute (FPM) / meters per second (m/s).

FAQs

  • All V70 PRC Brush Cutters are equipped with a bent-axis piston motor, delivering high torque and fast recovery in tough cutting conditions. 
  • The V60 IRC Brush Cutter uses different motor types depending on the configuration: 
    • Standard and High Flow models use an Eaton® Geroler motor, delivering consistent performance with a maximum operating pressure of 3,500 PSI on Standard Flow and 4,100 PSI on High Flow machines. 
    • High Pressure (IRC-HP) models step up to a radial piston motor, capable of handling pressure up to 4,500 PSI. This design delivers more torque under load, ideal for tough, high-demand cutting jobs. 
  • Both the V60 IRC-HP and V70 PRC models use piston motors, allowing them to rapidly spin up the heavy-duty flywheel, reaching full speed in approximately 13 seconds. 
  • The V70 Open Front Brush Cutter delivers up to 37% faster blade tip speed compared to the V60 IRC-HF model, resulting in improved cutting performance, especially in dense brush and tall grass. 
  • However, unlike the V60 Open Front Cutter, the V70 does not include a hydraulic brake. Without braking, the flywheel continues spinning for several minutes after the hydraulics are shut off, which operators should be aware of for safety and handling. 

Note: The V70 Open Front Cutter is designed for high flow skid steers only and is not compatible with standard flow machines. 

Here’s a chart of the key differences between Virnig V70 & V60 Brush Cutters:

The V70 Open Front Cutter is designed to rough-cut large, dense brush or trees up to 8” in diameter. 

For efficient operation, purchase a V70 Open Front Cutter with a cut width that is wider than the tires or tracks of your loader.  

Loader capacity should also be considered. Selecting a skid steer attachment that is too wide will add weight, volume, and surface area, all factors that could affect performance.

The brush cutter motor flow rate should be optimized to match the skid steer’s flow rate. These are measured in gallons per minute (GPM). Running a higher GPM than the brush cutter motor is rated for can potentially damage the motor and will void the warranty. All Virnig skid steer attachments with hydraulic motors have a zero overflow rating to prevent premature failure. 

The V70 Open Front Brush Cutter has two motor options to match your high flow skid steer.  

  • 1: 30-39 gpm flow rate (39 gpm max) – for skid steers with flow rate of 30-39 gpm 
  • 2: 39-50 gpm flow rate (50 gpm max) – for skid steers with flow rate of 39.1-50 gpm 

For a skid steer with hydraulic flow of 40 gpm, you’ll need the 39-50 gpm motor option and you’ll have to choose between a 72, 78 or 84 inch cutting width. 

For more information, contact DTE Equipment.

No, the V70 Open Front Brush Cutter doesn’t have a brake. The cutter’s flywheel will continue to spin for several minutes before stopping. Operators should NEVER leave the cab until the flywheel stops spinning. 

The V70 Open Front Cutter can cut trees up to 8” in diameter. Cutting trees larger than 8” in diameter could damage the motor and components and lead to expensive repairs.

The spindle is the most expensive performance component on a skid steer brush cutter. It is responsible for smoothly transferring power from the hydraulic motor to the flywheel and absorbing impact that could damage the hydraulic motor.  

High-performance skid steer brush cutters require heavy-duty spindles to ensure reliability and productivity. Virnig understands this requirement by using a 3 ⅜” forged spindle shaft with USA made bearings on all V70 Open Front Brush Cutter models. 

The case drain connection indicator provides visual confirmation of a functioning case drain. If there’s oil coming out of the 90 degree elbow, the case drain is either not connected to the machine or isn’t functioning properly. Steady oil flow coming from this line could also mean something is wrong with the skid steer. 

No. Running the flywheel system in reverse (clockwise) will also cause the cutter to cut poorly, easily stall, and have minimal torque.  

The V70 Open Front Brush Cutter is designed to spin counter-clockwise and takes several minutes to slow down. If the flywheel is running in reverse, slow down will be much faster and very loud.  

Operating the V70 Open Front Brush Cutter’s flywheel in the counter-clockwise direction is essential for proper operation preventing damage to the cutter’s blades and motor.

Teeth are positioned between the blades and cut slightly below the blades for a more manicured finish. They can also help grind small stumps. 

No, the V70 Open Front Brush Cutter is not designed for finish work like a V50 Rotary Brush Cutter, so the floating deck and rollers are not options. 

The V70 Brush Cutter comes ready to operate with couplers and 1” diameter Eaton® hoses.

Skid steer brush cutters are capable of throwing debris over 200 feet and can cause serious bodily harm or death if not used with a shatterproof cab.

Options

Carbide Teeth

  • Grind stumps and mulch material for a better finish.

Pressure Gauge

  • Monitor hydraulic operating pressure for max productivity. Helps utilize full flywheel inertia and maintain high performance without going into relief.