JSW All-Electric vs Servo-Hydraulic Machines: the Real Cost Difference

Servo-pump machines are now sold as standard across the market — old-style hydraulics with a pump running flat out regardless of whether the machine is moving have all but disappeared. Buyers increasingly ask a fair question: "Why pay a JSW premium when my servo-hydraulic machine already saves electricity?" The answer needs a sharper comparison than the old "electric vs hydraulic".

Where Servo-Hydraulics Still Lose Energy

A servo pump solved hydraulics' biggest problem — idling. The pump motor slows down or stops when the machine doesn't need flow. That was a real, well-earned improvement.

What servo-hydraulics does not solve is the nature of hydraulic power transmission itself. Oil still gets pushed through valves, hoses and cylinders, with fluid friction losses typically in the 15–25% range — against the much smaller losses of direct transmission through ball screws on all-electric machines. During the pressure-holding phase (while plastic packs in the mold), a servo motor must still push oil at high pressure to maintain force — while an electric machine simply locks position electrically at that stage, drawing negligible power. And oil heats up during operation, so extra energy goes to the chiller that cools it — a cost an all-electric machine does not have at all, since it holds no oil.

Added together, that typically means a JSW all-electric machine uses noticeably less energy per kilogram of plastic processed than a modern servo-hydraulic machine of the same tonnage — a smaller gap than against old-style hydraulics, but still significant enough to factor into a purchase decision. The exact percentage depends on the part, cycle and both machines' configuration — send us your process data for a precise comparison.

The Other Half of the Story: Parallel Axis Motion

A servo-hydraulic machine typically has one pump serving every function in sequence — mold opening, ejection, dosing. On a JSW all-electric machine, each axis is driven by its own independent servo motor, so mold opening, part ejection and dosing for the next shot can happen at the same time. That parallelization typically shortens the cycle, meaning more finished parts per hour on the same machine — an effect that is easy to underweight in a price comparison, and one that goes straight to profitability.

How This Fits into a Leasing Payment

The higher JSW purchase price shows up as a higher monthly leasing payment. But energy savings and the extra profit from a faster cycle are also monthly figures — so the relevant question is the net difference, not the gross machine price. The calculator on this page computes exactly that: enter both machine prices, leasing terms, consumption and output, and get the net monthly effect in euros.

At some leasing companies in the region, equipment that demonstrably cuts energy use and CO2 emissions qualifies for better "green" financing terms, sometimes backed by programs like the EBRD GEFF — check the current offer directly with the leasing company, terms change.

Perotec Systems supplies JSW all-electric injection molding machines for the Serbian market, with sizing for your part, installation, commissioning and service. For a more detailed comparison against classic hydraulics, see Electric vs Hydraulic Injection Molding Machines. Contact us with your part and current machine data and we will prepare an exact comparison.