(Bore Diameter)/2)2 × π(3.14) = Piston Surface Area
Use this to find the area in working square inches on hte barrel side of the piston in square inches.
((Bore Diameter / 2)2 - (Rod Diameter / 2)2) × 3.14 = Rod Side Piston Surface Area
Use this to find the working surface area on the rod side of the piston in square inches.
Piston Surface Area × Stroke / 231 = Gallons (Volume)
Use this to determine volume of oil to fill a cylinder
(Cyl. Area) in2 × PSI = (Pounds of Force) LBF.
Determine how much force will be applied with a certain cylinder and psi. You can also work backwards to find out what psi you would need to run to achieve a specific amount of force.
CYLINDER AREA IN2 × CYLINDER STROKE × 60 ÷ TIME IN SECONDS × 231 = GPM
Use this to find the rate of flow based on cylinder speed or use to calculate the speed your cylinder will travel based on your GPM.
PSI × GPM ÷ 1714 × PUMP EFFICIENCY = HP
Determine your required engine horsepower using your PSI and GPM.
TORQUE × RPM ÷ 63025 = MOTOR HP
Determine your horsepower using your torque and rpm. Work backwards using your rpm and hp to determine your torque.
PSI × MOTOR DISPLACEMENT ÷ 6.28 = MOTOR TORQUE
Determine your motor torque using the psi and motor displacement.
RPM × DISPLACEMENT ÷ 231 = GPM
Determine your pumps gpm or work backwards to figure out your displacement.