Author: Xrido Group
Technical review: Xrido Engineering Team
Published: Aug 19, 2026
Updated: Sep 4, 2026
Quick answer
A mobile shredder’s productivity depends as much on its hopper, infeed feeder, discharge conveyor and magnet as on the shredding chamber. Size the hopper for your loading machine, choose conveyor length for your stockpile plan, and add magnetic separation for ferrous recovery.
Key takeaways
- Hopper size and feeder control must match the loading machine to keep the chamber fed steadily.
- Discharge conveyor length and stacking height shape stockpile logistics and secondary separation options.
- An overband magnet recovers ferrous metal automatically as material leaves the shredder.
- Options like wrapping screens and dust suppression depend on material and local regulation.
When buyers compare shredders they focus on the shafts and drive. In daily operation, the components around the chamber — hopper, feeder, conveyor and magnet — decide whether the machine runs productively or waits.
Hopper and infeed system
The hopper receives material from your excavator or wheel loader. Key checks:
- Capacity and shape — the hopper must accept your loading bucket in one pass without spilling. An undersized hopper forces slow, careful loading that throttles the whole line.
- Infeed feeder — a hydraulic feeder pushes material into the chamber at a controlled rate and can reverse to clear jams. Confirm the reversing function and control response.
- Control linkage — the operator usually runs the loading machine and the feeder together; ask how the controls integrate.
The shredding chamber
The chamber houses the slow-speed counter-rotating shafts that grip and shear material. Cutter design, shaft speed and the screen below the chamber set the output particle size. See how a mobile shredder works for the mechanism.
Discharge conveyor
The shredded material leaves the chamber on a belt conveyor. Specify it around your stockpile and separation plan:
- Length and stacking height — longer conveyors build larger stockpiles before repositioning is needed.
- Discharge position — the belt must present material to the magnet and, if fitted, to further separators at the right height and angle.
- Belt durability — sharp shredded fragments test belt quality; ask about cleaning systems that return carry-back material.
Overband magnet
For metal-bearing feeds, an overband magnet suspended above the discharge conveyor continuously lifts ferrous pieces out of the shredded stream. It is effectively mandatory for scrap metal and demolition wood work. Confirm the suspension height is adjustable as the belt wears and that the magnet discharges to a sensible collection point.
Power pack
Diesel drives suit sites without grid power; electric drives cut running cost and noise where yard power exists. Some machines offer both or hybrid arrangements — specify honestly where the machine will work.
Options worth discussing
- Dust suppression — water spray bars where dry, dusty material meets local regulation.
- Wrapping screens — pre-sorting or an ordered screen change system reduces downtime between output sizes.
- Remote monitoring — machine telemetry helps fleet operators track hours and faults.
Specify these components against your material and site — contact Xrido for configuration guidance and check our mobile equipment line.
Frequently asked questions
Is the overband magnet necessary for clean wood?
Clean pallet wood contains few nails, but demolition wood almost always does. Most wood recyclers keep a magnet fitted because ferrous contamination downgrades the chip product.
How long should the discharge conveyor be?
Long enough to reach your stockpile or separation equipment without repositioning the machine constantly. Balance conveyor length against transport width limits.
What hopper size do I need?
Match it to your loading machine: the hopper should accept a full bucket pass without spillage. Bring your excavator bucket size to the specification discussion.
Sources
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