Gear Pump CC Calculator – Easy Guide to Calculate Pump Displacement
Use a gear pump cc calculator to quickly find the displacement of your pump in cubic centimeters (cc). This helps you select the right pump size for hydraulic systems and improve efficiency. Follow this simple guide to learn how to calculate gear pump cc step by step.
Gear Pump CC Calculator
How to Use a Gear Pump CC Calculator
- Enter gear outer diameter (OD): Measure the full diameter of the gear in millimeters.
- Enter gear inner diameter (ID): Measure the shaft hole or root diameter.
- Enter gear width (thickness): Measure the width of the gear in millimeters.
- Enter number of gears: Usually 2 for standard gear pumps.
- Click calculate: The calculator will show displacement in cc/rev (cubic centimeters per revolution).
- Always use accurate measurements.
- Use consistent units (mm recommended).
- Double-check inputs before calculating.
How to Calculate Gear Pump CC (Step-by-Step)
Calculating the displacement of a gear pump requires knowing the physical dimensions of the gears. Use the formula below for manual calculation.
Step-by-Step Example
Given Data:
- Outer Diameter (OD) = 80 mm
- Inner Diameter (ID) = 40 mm
- Width = 30 mm
- Number of Gears = 2
1. Square the diameters:
OD² = 80 × 80 = 6400
ID² = 40 × 40 = 1600
2. Subtract:
6400 - 1600 = 4800
3. Multiply by π / 4:
π/4 ≈ 0.785
4800 × 0.785 = 3768
4. Multiply by width:
3768 × 30 = 113040
5. Multiply by number of gears:
113040 × 2 = 226080
6. Convert to cc:
226080 ÷ 1000 = 226.08 cc/rev
Final Answer: Gear Pump Displacement = 226.08 cc/rev
Gear Pump CC Conversion Chart
Reference table for flow rates based on various displacement sizes and RPM speeds.
| CC/Rev | Liters/Min @ 1000 RPM | Liters/Min @ 1500 RPM | Liters/Min @ 2000 RPM |
|---|---|---|---|
| 5 cc | 5 L/min | 7.5 L/min | 10 L/min |
| 10 cc | 10 L/min | 15 L/min | 20 L/min |
| 20 cc | 20 L/min | 30 L/min | 40 L/min |
| 50 cc | 50 L/min | 75 L/min | 100 L/min |
| 100 cc | 100 L/min | 150 L/min | 200 L/min |
Note: Flow Rate (L/min) = CC × RPM ÷ 1000
Frequently Asked Questions (FAQs)
A gear pump cc calculator helps you calculate pump displacement in cubic centimeters per revolution. It simplifies manual calculations.
Displacement determines how much fluid the pump moves per revolution. It directly affects flow rate and system performance.
Most calculations use millimeters (mm) for dimensions and cubic centimeters (cc) for displacement.
Multiply cc by RPM and divide by 1000 to get flow rate in liters per minute (L/min).
Yes. Use the displacement formula and follow step-by-step calculations. However, a gear pump cc calculator saves time and reduces errors.
Yes. A larger gear width increases displacement and flow capacity.
It is highly accurate if you input correct measurements.
It can cause excessive flow, pressure issues, and system inefficiency.
It works for standard external gear pumps. Complex designs may require adjustments.
Yes. Gear pump cc calculation is widely used in hydraulic system design.