Ask five people how to size an industrial shredder and you'll get five different starting points — capacity, motor size, blade type. None of those are wrong exactly. They're just not where the decision actually begins.
Start with what you're actually feeding it
The material comes first, always. Two customers asking for "5 tonnes an hour" can need completely different machines if one is feeding clean pallet wood and the other is feeding steel-reinforced tyres. Toughness, bulk density, contamination, and the size of the largest single piece all shape the decision before capacity even enters the conversation.
Feed opening and cutter geometry
Whatever goes in has to physically fit, with room to spare — that part's obvious. Less obvious is how cutter geometry does the real work after that: coarse profiles rip through volume fast, finer ones trade some throughput for a tighter, more consistent output straight off the shaft.
Why torque matters more than horsepower here
For dense or contaminated material, slow and forceful beats fast and light. That's the whole reason twin-shaft shredders exist — running at low shaft speed with high torque, they tear through mixed and bulky waste that would stall a faster single-shaft machine.
The screen decides what leaves the chamber
If downstream equipment needs a consistent particle size — a baler, a conveyor, a mill — a screen or sizing grid at the discharge holds back anything oversized until it's been reduced further. Skip this, and you're relying on the shredder alone to hit a spec it was never built to guarantee.
What we actually need from you
Photos of the toughest, largest pieces in your waste stream tell us more than a spec sheet ever could. Add your target hourly rate and the output size you need downstream, and that combination — not a single number — is what determines shaft layout, cutter profile, drive rating and discharge arrangement.