Explore hydraulic motor calculations and formulas for precise engineering solutions on Evolution’s engineering toolbox.
GPM of Flow Needed for Fluid Motor Speed
Example: How many GPM are needed to drive a 3.75 cubic inch motor at 1500 rpm?
Formula: Motor Displacement x Motor RPM ÷ 231 = gpm
Fluid Motor Speed from GPM Input
Example: How fast will a 0.75 cubic inch motor turn with 6 gpm input?
Formula: 231 x GPM ÷ Fluid Motor Displacement = RPM
Fluid Motor Torque from Pressure and Displacement
Example: How much torque does a 2.5 cubic inch motor develop at 2,000 psi?
Formula: PSI x Motor Displacement ÷ (2 x π) = torque in inch pounds
Fluid Motor Torque from Horsepower and RPM
Example: How much torque is developed by a motor at 12 horsepower and 1750 rpm?
Formula: Horsepower x 63025 ÷ RPM = torque in inch pounds
Fluid Motor Torque from GPM, PSI and RPM
Example: How much torque does a motor develop at 1,200 psi, 1500 rpm, with 10 gpm input?
Formula: GPM x PSI x 36.77 ÷ RPM = torque in inch pounds
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