How Servo Hydraulic Presses Can Cut Energy Costs by Up to 30%
How Servo-Hydraulic Presses Can Cut Energy Costs by Up to 30%
For decades, the hydraulic press has been the workhorse of metal forming and stamping. But that power came at a cost—your motor ran at full speed, full time, even when the ram was idle. That waste is costing you thousands every year.
At Goodsjack Hydraulic Machinery, we've engineered a smarter approach. Our servo hydraulic press systems replace the fixed-speed induction motor with a servo-driven variable-speed pump. The result? Energy savings of up to 30%—and often more—depending on your application.
Why Conventional Hydraulic Presses Waste Energy
To understand the savings, you first need to see the problem. In a standard hydraulic press, the electric motor drives the pump at a constant speed regardless of demand. The pump continuously pushes oil through the system, and excess flow is dumped back to the tank through pressure relief valves.
Think of it like a car with the accelerator pressed to the floor, using the brakes to control speed. It's inefficient, generates excess heat, and burns through electricity even when the press is idle or in a holding cycle.
How Goodsjack's Servo-Hydraulic Technology Works
Our servo-hydraulic press uses a servo motor and a variable-displacement pump that only delivers the flow and pressure required at each moment of the cycle.
- During idle or holding phases, the motor slows down to near-zero RPM, consuming almost no power.
- During pressing, the motor ramps up precisely to match the force and speed needed.
- During retraction, the motor acts as a generator, regenerating energy back into the system, which can be stored for the next cycle or fed back into the grid.
This closed-loop control system (pressure and position sensors + servo drive + programmable logic) delivers ±1 bar pressure accuracy and response times under 50 milliseconds.
Real-World Cost Comparison: 100-Ton Press
Let's look at the numbers. A 100-ton hydraulic press running a typical 8-hour production shift (500 bends per hour) shows dramatic differences:
| Metric | Conventional Hydraulic | Servo-Hydraulic (Goodsjack) | Saving |
|---|---|---|---|
| Peak Power Draw | 15 kW | 12 kW | 20% |
| Average Power – Bending | 12 kW | 6 kW | 50% |
| Idle Power (motor off at rest) | 5 kW | 0 kW | 100% |
| Total Daily Energy Use | 120 kWh | ~46 kWh | ~61% |
| Annual Energy Cost (2,000 hrs, $0.15/kWh) | $4,500 | $1,740 | $2,760 saved/year |
Beyond Electricity: Additional Savings
Energy is just the beginning. Servo-hydraulic systems also eliminate or reduce many recurring costs:
- No hydraulic oil changes (annual saving: ~$500–$700)
- No oil disposal fees (~$200/year)
- Reduced cooling requirements—less heat generated means smaller (or no) cooling fans (~$100–$200/year saved)
- Lower maintenance on pumps and motors—servo systems run only when needed, extending component life
Over 10 years, the total operating cost difference between a conventional hydraulic press and a servo-hydraulic model can exceed $40,000.
Precision and Productivity Gains
Energy savings are compelling, but the performance benefits are just as important:
- Higher repeatability: Closed-loop control delivers positioning accuracy of ±0.005 mm, reducing scrap rates.
- Faster cycle times: Quick response times (under 50 ms) mean shorter idle and approach strokes.
- Lower noise: No constant pump drone—quieter operation improves shop floor conditions.
- Consistent quality: No thermal drift from oil temperature variation—your parts are uniform shift after shift.
Is a Servo-Hydraulic Press Right for Your Shop?
At Goodsjack, we've installed servo-hydraulic systems in a wide range of applications—from automotive stamping and LED heat sink forging to precision aerospace components.
If your operation:
- Runs presses through multiple cycles per hour (idle time = waste),
- Requires tight tolerances and consistent part quality,
- Wants to reduce monthly electricity bills and environmental footprint,
...then upgrading to a Goodsjack servo-hydraulic press is one of the smartest capital investments you can make.
Ready to Calculate Your Savings?
Every shop is different. Tonnage, cycle profile, material type, and local electricity rates all affect the exact numbers. Goodsjack offers free energy audits and ROI projections tailored to your specific production data.
Our team can help you model the savings for your existing press lines—or design a new servo hydraulic system that fits your exact needs.
Talk to a Goodsjack engineer today
Get a personalized energy-saving estimate for your shop
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