 Force  The amount of force a hydraulic cylinder can generate is equal to the hydraulic pressure times the “effective area” of the cylinder (see cylinder selection charts).   Example 1 An RC106 cylinder with 14,5 cm^{2} effective area operating at 700 bar will generate what force? Force = 7000 N/cm^{2} x 14,5 cm^{2} = 101500 N = 101,5 kN
Example 2 An RC106 cylinder lifting 7000 kg will require what pressure? Pressure = 7000 x 9,8 N ÷ 14,5 cm^{2} = 4731,0 N/cm^{2} = 473 bar.
Example 3 An RC256 cylinder is required to produce a force of 190.000 N. What pressure is required? Pressure = 190.000 N ÷ 33,2 cm^{2} = 5722,9 N/cm^{2} = 572 bar.
Example 4 Four RC308 cylinders are required to produce a force of 800.000 N. What pressure is required? Pressure = 800.000 N ÷ (4 x 42,1 cm^{2}) = 4750,6 N/cm^{2} = 476 bar. Remember, since four cylinders are used together, the area for one cylinder must be multiplied by the number of cylinders used.
Example 5 A CLL2506 cylinder is going to be used with a power source that is capable of 500 bar. What is the theoretical force available from that cylinder? Force = 5000 N/cm^{2} x 366,4 cm^{2} = 1.832.000 N = 1832 kN 
Use this formula to determine either force, pressure or effective area if two of the variables are known.     Cylinder Oil Capacity  The volume of oil required for a cylinder (cylinder oil capacity) is equal to the effective area of the cylinder times the stroke*.   Example 1 An RC158 cylinder with 20,3 cm^{2} effective area and 200 mm stroke requires what volume of oil? Oil Capacity = 20,3 cm^{2} x 20 cm = 406 cm^{3}
Example 2: An RC5013 cylinder has an effective area of 71,2 cm^{2} and a stroke of 320 mm. How much oil will be required? Oil Capacity = 71,2 cm^{2} x 32 cm = 2278,4 cm^{3}
Example 3: An RC10010 cylinder has an effective area of 133,3 cm^{2} and a stroke of 260 mm. How much oil will it require? Oil Capacity = 133,3 cm^{2} x 26 cm = 3466 cm^{3}
Example 4: Four RC308 cylinders are being used, each with an effective area of 42,1 cm^{2} and a stroke of 209 mm. How much oil will be required? Oil Capacity = 42,1 cm^{2} x 20,9 cm = 880 cm^{3} for one cylinder. Multiply by four to obtain the required capacity: 3520 cm^{3}     * Note: these are theoretical examples and do not take into account the compressibility of oil under high pressure.
 
