Fluid Power Engineering
Hydraulic Cylinder Calculator
Analyze hydraulic cylinders. Control inlet pressure, flow rates, cylinder dimensions, and piston rod diameter. Simulate extension / retraction dynamics and inspect output force curves.
Design Type
Double Acting
Push-Pull Model
Mesh
50 design points
Pressure sampled
Output
CSV
Force schedule ready
Parameters
Cylinder preset size
Animated stroke cycle
Actuator Physics Equations
Bore area (Push)
A_bore = pi * D^2 / 4
Annulus area (Pull)
A_annulus = pi * (D^2 - d^2) / 4
Output forces
F_push = P * A_bore, F_pull = P * A_annulus
Flow velocities
v_ext = Q / A_bore, v_ret = Q / A_annulus
At 150 bar, extension push capacity is 75.40 kN; retraction pull capacity is 51.54 kN.
Rod presence reduces retraction area to 34.4 cm² compared to the bore area of 50.3 cm².
Due to the reduced volume on retraction, retraction speed (0.10 m/s) exceeds extension speed (0.07 m/s) at equivalent flow rates.
Dynamic Cylinder Assembly
Push Force (Extension)
75.40kN
Pull Force (Retraction)
51.54kN
Extension Velocity
0.066m/s
Retraction Velocity
0.097m/s
Output Force vs. System Pressure
Cylinder Pressure/Force Schedule
| Pressure (bar) | Extension Force (kN) | Retraction Force (kN) |
|---|---|---|
| 10 | 5.03 | 3.44 |
| 50 | 25.13 | 17.18 |
| 90 | 45.24 | 30.93 |
| 130 | 65.35 | 44.67 |
| 170 | 85.45 | 58.41 |
| 210 | 105.56 | 72.16 |
| 250 | 125.66 | 85.90 |
| 290 | 145.77 | 99.65 |
| 330 | 165.88 | 113.39 |
| 370 | 185.98 | 127.14 |
| 410 | 206.09 | 140.88 |
| 450 | 226.19 | 154.63 |
| 490 | 246.30 | 168.37 |