CONVERSIONS & FORMULAS
111
in
3
/rev x 16.387 = cm
3
/rev cm
3
/rev x 0.06102 = in
3
/rev
gpm x 3.78 = L/min L/min x 0.2642 = gpm
hp x 0.7457 = kW kW x 1.341 = hp
lb-ft x 1.3567 = Nm Nm x 0.7376 = lb-ft
lbs/in
2
(psi) x 0.06895 = bar bar x 14.50 = lbs/in
2
(psi)
lbs/in
2
(psi) x 6.895 = kPa kPa x 0.1450 = lbs/in
2
(psi)
lb x 0.4536 = kg kg x 2.205 = lbs
lb x 4.448 = N N x 0.2248 = lbs
in
3
x 16.387 = cm
3
cm
3
x 0.06102 = in
3
in
2
x 6.452 = cm
2
cm
2
x 0.1550 = in
2
in x 25.4= mm mm x 0.03937 = in
degree F-32 = °C 1.8 x °C+32 = ° F
1.8
c
St x 1.0 = mm
2
/sec mm
2
/sec x 1.0 =
c
St
SSU ≅ cSt x 4.25 + 14 20 cSt ≅ 99 SSU
pressure(psi) x displacement (in
3
/rev)
2π x mech. eff.
rpm x (in
3
/rev) x (psi)
395934 x overall eff.
rpm x (in
3
/rev) x volumetric eff.
231
231 x flow rate(U.S. gpm) x volumetric eff.
displacement (in
3
/rev)
pressure(psi) x displacement (in
3
/rev) x mech. eff.
2π
rpm x (in
3
/rev) x (psi) x overall eff.
395934
pressure(bar) x displacement (cm
3
/rev)
20π x mech. eff.
rpm x (cm
3
/rev) x (bar)
600000 x overall eff.
rpm x (cm
3
/rev) x volumetric eff.
1000
1000 x flow rate (Lpm) x volumetric eff.
displacement (cm
3
/rev)
pressure(bar) x displacement (cm
3
/rev) x mech. eff.
20π
rpm x (cm
3
/rev) x (bar) x overall eff.
600000
DEFINITION & UNIT
displacement
flow
power
torque
pressure
weight
force
volume
area
length
temperature
viscosity
FLUID POWER FORMULAS
Pump input torque lbs. in.
Pump input power hp
Pump output flow U.S. gpm
Fluid motor speed rpm
Fluid motor torque lbs. in.
Fluid motor power hp
(metric)
Pump input torque Nm
Pump input power kW
Pump output flow Lpm
Fluid motor speed rpm(min
-1
) (tr/mn)
Fluid motor torque Nm
Fluid motor power .kW
“The product information specifications and descriptions contained in this catalog have been
compiled for the use and convenience of our customers from information furnished by the
manufacturer, and we cannot and do not accept any responsibility for the accuracy or correctness
of any description, calculation, specification or information contained herein. No such description,
calculated, specified or information regarding the products being sold has been made part of the
basis of the bargain nor has same created or amounted to an express warranty that the products
would conform thereto. We are selling the goods and merchandise illustrated and described
in this catalog on an as is basis and disclaim any implied warranty, including any warranty
of merchantability or warranty of fitness for any particular purposes whatsoever, with
respect to the goods and merchandise sold. All manufacturer warranties shall be passed on to
our customers, but we shall not be responsible for special, indirect, incidental or consequential
damages resulting from the use of any of the products or information contained or described in the
catalog.”
