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Hydraulic Formulas



Torque, HP, Speed Relations in Hydraulic Pumps & Motors



T = (HP x 5252) / RPM HP = (T x RPM) / 5252 RPM = (HP x 5252) / T



Definitions

T = Torque, foot-lbs

RPM = Speed, revs./minute

HP = Horsepower



Hydraulic Power Flowing Through the Pipes



HP = (PSI x GPM) / 1714



Definitions

HP = Horsepower

PSI = Gauge pressure, lbs/sq. inch

GPM = Flow, gallons per minute



Force Developed by an Air or Hydraulic Cylinder

F = A x PSI



Definitions

F = Force or thrust, lbs

A = Piston area, square inches

PSI = Gauge pressure, lbs/sq. inch



Inch & Millimeters (MM) Conversions



MM = inches x 25.4

Inches = MM x 0.03937