New 520 Drawn Flail Shredder

Cutters & Shredders
Key Features
  • Front rubber deflectors
  • Heavy-duty gearbox
  • Steel rotor bearings
  • Square rotor designed for superior strength

More Info


Heavy-duty John Deere-designed gearbox

A heavy-duty, John Deere-designed and John Deere-built gearbox transfers power to the Kevlar® drive belts through cross shafts with intermediate bearing supports:

  • The transmission is bolted directly to the frame.
  • This gearbox has a constant-duty rating of 180 hp and a maximum rating of 270 hp.
  • It carries a limited two-year warranty.

Kevlar is a U.S.-registered trademark of E.I. du Pont de Nemours and Company.

Drawn or integral model available to meet a variety of applications
The 520 Flail Shredder can be ordered with two different types of tractor hookup, drawn or integral, depending on preference. An integral flail shredder allows making a very tight turning radius, even when the tractor is equipped with dual wheels.
Flail fastening system eliminates clogging from mud or crop residue
Flail fastening systemFlail fastening system

The flail fastening system eliminates clogging from mud or crop residue. Its bracket design also helps prevent knife and ring loss.

Lateral-bearing service accessLateral-bearing service access
Center-bearing service accessCenter-bearing service access

Hard-to-reach center bearings can be serviced with the conveniently located grease fittings at the rear of the machine:

  • There is no need for the operator to crawl under the machine to perform this service task, thus increasing the probability of the job being performed and completed safely.
Square rotor designed for superior rotor strength

Designed for superior rotor strength, the square rotor, together with the opposite-mounted flails, provides a machine with less potential vibration, increasing the life of rotor bearings and belts.


Since 248 knives are mounted on the full length of the rotors on the main cutterbar, with 2.5 cm (1 in.) of overlap, a stalk won't get missed. This is a significant improvement over the 216 knives mounted on the previous 220 Flail Shredder.

Optional wheel supports eliminate uncut middle strip in non-row-crop field
Wheel supportsWheel supports

Optional wheel supports eliminate the uncut middle strip in crops like wheat, oats, and barley. The shredder can be pulled at an angle, offsetting the rotors and cutting evenly across the entire width of the machine.

Steel rotor bearings for increased bearing life
Rotor bearingsRotor bearings

The rotor bearings are now made of steel and have a three-lip seal to keep the dirt out and increase the life of the bearings.


The side and center bearings now have guards in order to avoid leaks and dust, increasing the life of the bearings.

Rubber deflectors will not dent or rust
Rubber deflectorsRubber deflectors
Front rubber deflectors keep debris and other materials under the shredder and away from the tractor and operator. Because they are made out of rubber, they will not dent or rust.


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John Deere520 Drawn Flail Shredder
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Power requirements
Tractor PTO hp range Minimum 89 kg
120 hp
Tractor RPM 1,000 rpm
Gear case
Number of knives 248 side slicer (124 pairs)
Knife dimensions 7.87 x 63.5 mm
0.31 x 2.5 in.
Knife mounting system Bracket and D-ring
Type Alloy steel, hardened with vanadium carbide and reversible
Knives overlap 27.18 mm
1.07 in.
Tip speed 224 km/h
139 mph
Rotor speed 2,000 rpm
Rotor diameter Square rotor 17.8 x 17.8 cm
7 x 7 in.
Rotor bearing Double-row, barrel-type, triple-sealed, 2-year warranty
Bearing size 42.86 mm
1.69 in.
Belts Kevlar, 3/5V heavy-duty
PTO drivelines 44.5 and 35.1 mm
1.75 and 1.38 in.
Hitch Drawn or Integral (Cat. 3 or 3N Quik-Coupler required)
Hood thickness
Safety deflector Rubber deflector
Gauge wheels 4 (Drawn), 2 (Integral); infinitely adjustable
Warning lights Integral (standard), drawn (optional)
Cutting capacity
Cutting width 6.1 m
20 ft
Cutting height 7.6-25.4 cm
3-10 in.
Transport width Endwise; drawn 2.39 m
7.83 ft
Integral 6.48 m
21.25 ft
Transport length Endwise; drawn 7.34 m
24.08 ft
Integral 2.39 m
7.83 ft
Weight 2,268 kg
5,000 lb
Optional equipment
Easy transport Available
Constant velocity joint driveline Available
Skid shoes Available

Accessories and Attachments

Easy End Transport

Easy-End Transport - BP18092
Endwise transportEndwise transport

An easy-end transport system is available as an attachment on the 520 Flail Shredder for more convenient transport positioning.


The attachment includes two additional arms, one for the front and one for the rear of the machine:

  • Reduces the time it takes to prepare the machine for endwise transport
  • Allows the arms to be left on for normal field operation
  • Not compatible with the disk hitch attachment
  • Transport width of less than 8 ft
Field positionField position
Transport positionTransport position

Transport arms are pinned in the down position for transport and pinned up during field operation.


Deflectors - Rubber - BP18050
Deflectors - Steel - BP16572
Disk Hitch with Hose Support - BP16346
Driveline with Overrunning Clutch and Constant Velocity Joint, 1-3/4 In. Drive - AP40461
Driveline with Overrunning Clutch and Constant Velocity Joint, 1-3/8 In. Drive - AP40459
Driveline with Overrunning Clutch, 1-3/4 In. Drive - AP40460
Driveline with Overrunning Clutch, 1-3/8 In. Drive - AP40458
Gauge Wheel Support - BP17320

Additional gauge wheels can be ordered, if needed, for improved cutting performance.

Lateral Skid Plate - AP40006
Safety Warning Light - BP18226
Warning lightsWarning lights

Transport warning lights are standard on the 520 Integral Flail Shredder and optional on the 520 Drawn Flail Shredder.

Wheel and Tire (7.60-15 6PR) - BP18208

Weed Separator

Weed Separator (Center Divider) - BP16573