Calculator Inputs
Example Data Table
| Equipment | Input Power (kW) | Output Power (kW) | Loss (kW) | Efficiency (%) |
|---|---|---|---|---|
| Helical Gearbox | 15.00 | 14.10 | 0.90 | 94.00 |
| Belt Drive | 8.00 | 7.08 | 0.92 | 88.50 |
| Chain Drive | 11.50 | 10.70 | 0.80 | 93.04 |
| Worm Gear Reducer | 9.20 | 7.10 | 2.10 | 77.17 |
| Rolling Bearing Assembly | 5.50 | 5.23 | 0.27 | 95.09 |
Formula Used
Mechanical Efficiency: η = (Useful Output / Input) × 100
Power from Torque and Speed: P(kW) = (2 × π × N × T) / 60000
Losses: Loss = Input − Useful Output
Loss-Based Output: Output = Input − Total Loss
Loss-Based Input: Input = Output + Total Loss
Loss Percentage: Loss % = (Loss / Input) × 100
How to Use This Calculator
- Select the most suitable calculation method for your available data.
- Enter machine identification, benchmark efficiency, daily hours, and duty cycle.
- Provide either power, torque-speed, loss-based, or energy values.
- Press the calculate button to generate efficiency, losses, and grade.
- Review the summary cards, detailed table, and Plotly chart.
- Download the result as CSV or PDF for documentation.
Frequently Asked Questions
1. What does mechanical efficiency show?
It shows how much input power or energy becomes useful output. The rest is lost through friction, heat, vibration, leakage, or transmission resistance.
2. Can mechanical efficiency be above 100%?
No. Values above 100% usually mean incorrect measurements, mismatched units, or entered output values that exceed actual input.
3. Which method should I choose?
Use direct power when both power values are known. Use torque-speed for rotating equipment. Use loss-based inputs when losses are measured. Use energy mode for cycle or batch analysis.
4. Why are torque and speed useful?
They let you estimate shaft power when direct power meters are unavailable. This is common for motors, gearboxes, conveyors, pumps, and rotating production equipment.
5. What causes poor efficiency?
Common causes include friction, poor lubrication, misalignment, worn bearings, belt slip, overload, poor assembly, and operating outside the machine’s ideal range.
6. Does duty cycle change the efficiency result?
It does not change the core efficiency percentage directly. It helps estimate daily useful energy and daily losses under realistic operating time.
7. Are the export files suitable for reports?
Yes. The CSV file is useful for spreadsheets and logging. The PDF export captures the result area and chart for quick reporting or sharing.
8. How often should efficiency be checked?
Check after installation, maintenance, lubrication changes, load changes, or when heat, noise, energy use, or output quality suggest performance drift.