pull =sin(angle)*PSI*3.1415*(b2-d2)/4 lbs.
Push =sin(angle)*PSI*3.1415*b2/4 lbs.
For example when Bore of a Cylinder (b) = 15, Pound per Square Inch (PSI) = 10, Diameter of a Rod (d) = 10, Angle (degrees) = 90, then take the values into formula, then Push of a Hydraulic Cylinder is 1768.00 lbs, Pull of a Hydraulic Cylinder is 982.00 lbs.