We’ve all seen the videos. Those crushers where the two cylinders with teeth roll towards one another and just obliterate everything.
How?
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A couple of 30 horsepower electric motors, a very beefy gearbox, and some large roller bearings for each end of the blade spindles. That’s really all it is.
These industrial shredders are ready-made manufactured equipment that a company can just go out and buy. Pricing is in the upper 5 to middle 6 figure range, depending on what you’re planning on shredding and the amount of reduction in size between the average input material size and the average output material size. Also, most of these run on three-phase electricity.
The power of gear boxes pretty much.
If you have a motor than has 20lbs of torq, put it on a gearbox that’s 30:1 (30 input rotations= 1 output rotation) then, all of a sudden, your motor is producing 600lbs of torq.
Can also work the opposite way to.
If you have a motor that runs at 20RPM, put it on a 1:30 gearbox, then that motor now has an output of 600RPM.
A gearbox pretty much scales up or down the input values.
Power/ torque, as already mentioned. But two more things: big tough bearings for the moving parts, and 2) tough and hard steel alloys. Manganese, chromium, and molybdenum steel alloys are common. They give good control of hardness (cutting capability), toughness (not brittle) and abrasion resistance.
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