Cylinder Bore: 7″ | Piston Area: 38.485 in²
At 3,000 PSI → 115,454 lbs (57.7 tons)
7″ Bore Hydraulic Cylinder Force Table
| Pressure | Force (lbs) | Force (tons) | Force (kN) |
|---|---|---|---|
| 500 PSI | 19,242 lbs | 9.6 tons | 85.6 kN |
| 1,000 PSI | 38,485 lbs | 19.2 tons | 171.2 kN |
| 1,500 PSI | 57,727 lbs | 28.9 tons | 256.8 kN |
| 2,000 PSI | 76,969 lbs | 38.5 tons | 342.4 kN |
| 2,500 PSI | 96,211 lbs | 48.1 tons | 428.0 kN |
| 3,000 PSI | 115,454 lbs | 57.7 tons | 513.6 kN |
| 3,500 PSI | 134,696 lbs | 67.3 tons | 599.2 kN |
| 4,000 PSI | 153,938 lbs | 77.0 tons | 684.8 kN |
| 5,000 PSI | 192,423 lbs | 96.2 tons | 855.9 kN |
| 6,000 PSI | 230,907 lbs | 115.5 tons | 1,027.1 kN |
| 8,000 PSI | 307,876 lbs | 153.9 tons | 1,369.5 kN |
| 10,000 PSI | 384,845 lbs | 192.4 tons | 1,711.9 kN |
How to Calculate 7″ Bore Cylinder Force
Force = Pressure × Piston Area
Area = π × (Bore ÷ 2)² = π × (3.5)² = 38.4845 in²
To find the push force of a 7″ bore hydraulic cylinder, multiply the operating pressure (in PSI) by the piston area (38.485 in²).
Example at 3,000 PSI:
Force = 3,000 × 38.4845 = 115,454 lbs (57.7 tons)
Rod-Side (Pull) Force
The retract force is always less than the push force because the rod displaces part of the piston area. To calculate pull force, subtract the rod cross-section area from the bore area:
Pull Force = Pressure × (Bore Area − Rod Area)
Important Notes
- These are theoretical forces. Real-world output is 3-5% less due to seal friction.
- Rod diameter matters for retract force — larger rods reduce pull force significantly.
- Never exceed rated pressure. Most industrial cylinders are rated for 3,000 or 5,000 PSI.
- Dynamic vs static: Moving loads require additional force to overcome inertia and friction.
Other Bore Sizes
- 1″ bore force chart
- 1.5″ bore force chart
- 2″ bore force chart
- 2.5″ bore force chart
- 3″ bore force chart
- 3.25″ bore force chart
- 3.5″ bore force chart
- 4″ bore force chart
Need custom calculations?
Use our Interactive Hydraulic Cylinder Calculator for any bore, rod, and pressure combination.
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