Pneumatic uses compressed air to lower the knife, and hydraulic uses hydraulic pressure to lower the knife, which is more powerful and stable.
Pneumatics need to supply stable air pressure, if the air pressure is not enough, the cutting effect will be poor.
Efficiency: Pneumatic action can be faster to hydraulic pressure.
Energy consumption: hydraulic power requires more capacity and electricity. Maintenance costs are more.
Pneumatic maintenance costs are low, while hydraulic oil needs to be replaced every one to two years.