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:
Kevlar is a U.S.-registered trademark of E.I. du Pont de Nemours and Company.
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.
The flail fastening system eliminates clogging from mud or crop residue. Its bracket design also helps prevent knife and ring loss.
Hard-to-reach center bearings can be serviced with the conveniently located grease fittings at the rear of the machine:
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 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.
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.
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.
|Cutting width||6.1 m
|Cutting height||7.6-25.4 cm
|Transport width||Endwise; drawn 2.39 m
Integral 6.48 m
|Transport length||Endwise; drawn 7.34 m
Integral 2.39 m
|Belts||Kevlar, 3/5V heavy-duty|
|PTO drivelines||44.5 and 35.1 mm
1.75 and 1.38 in.
|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
|Tip speed||224 km/h
|Hitch||Drawn or Integral (Cat. 3 or 3N Quik-Coupler required)|
|Safety deflector||Rubber deflector|
|Gauge wheels||4 (Drawn), 2 (Integral); infinitely adjustable|
|Warning lights||Integral (standard), drawn (optional)|
|Constant velocity joint driveline||Available|
|Tractor PTO hp range||Minimum 89 kg
|Tractor RPM||1,000 rpm|
|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
Deflectors can be used on the front of the shredder to prevent cut material from being thrown forward. Rubber deflectors are recommended when shredding in rocky areas.
Additional gauge wheels can be ordered, if needed, for improved cutting performance.
Transport warning lights are standard on the 520 Integral Flail Shredder and optional on the 520 Drawn Flail Shredder.