Fawcett TM Upper - Hyd. Driven - Manual (Page 15)

GEROTOR MOTOR A25 A37 A50 A62 A100 A125
DISPLACEMENT (cubic inches per revolution)
0.82 1.16 1.53 1.88 3.11 3.73
GEROTOR SIZE (Inches) 0.250 0.375 0.500 0.625 1.000 1.250
CAPACITY (Maximum GPM) 8 8 8 8 8 8
SPEED (Maximum RPM) 2255 1592 1206 982 595 495
TORQUE (Maximum Inch-pounds) 149 222 284 363 570 656
MAXIMUM SIDE LOAD (pounds-force) 300 300 300 300 300 300
MAXIMUM PUSH FORCE (pounds-force) 500 500 500 500 500 500
MAXIMUM PULL FORCE (pounds-force) 300 300 300 300 300 300
Sample
Motor
Weights
(pounds)
F Standard Flange - Short Shaft 3.55 3.55 3.55 3.60 3.80 3.90
FMO Standard Flange - Long Shaft 3.65 3.65 3.65 3.70 3.90 4.00
FM Foot Mount - Long Shaft 6.15 6.15 6.15 6.20 6.40 6.50
F-T Turned Down Flange - Short Shaft 3.10 3.10 3.10 3.15 3.35 3.45
FMO-T Turned Down Flange - Long Shaft 3.20 3.20 3.20 3.25 3.45 3.55
FA-A Aluminum Body & Flange - Short Shaft 2.45 2.45 2.45 2.50 2.70 2.80
FMOA-A Aluminum Body & Flange - Long Shaft 2.55 2.55 2.55 2.60 2.80 2.90
FA-TA
Aluminum Body & Turned Down
Flange - Short Shaft
2.30 2.30 2.30 2.35 2.55 2.65
FMOA-TA
Aluminum Body & Turned Down
Flange - Long Shaft
2.40 2.40 2.40 2.45 2.65 2.75
The rotor gear of these low-weight motors rolls through four com-
plete "CYCLES" for each revolution of the output shaft. Thus,
four times greater torque at one-fourth of the conventional speed
is obtained without the use of gear reducers. In other words, with
hydraulic motors the same amount of torque is assured as you
would get from a much larger ordinary motor that is considerably
more expensive.
Of considerable importance to application design engineers is the
smooth rotation and long life of these unique motors. Because the
motors have five fluid chambers, the inherent four-to-one ratio
provides twenty fluid power cycles for each revolution of
the
output shaft. This feature assures a distinct addition, these
motors have only three moving parts (motor shaft, spline drive,
gerotor star) - this greatly extends the service life.
Within the broad range of each gerotor, any torque or speed can
be readily secured. Also the various sizes of gerotors available
provide a torque range from 0 to 656 inch-lbs. and R.P.M.
ranging from 0 to 2255. High selectivity to exactly meet
requirements is inherent in these motors.
We recommend parallel circuits versus series circuits, because
the back pressure generated cannot exceed 300 psi.
Recommended Oil: Mobil
®
DTE 13 (ISO-32 Hydraulic Oil).
Please note:
The capacity (GPM),
speed (RPM), and
output torque (IN-LBS)
provided in the table
are maximum quanti-
ties for
speci ? c gerotor
sizes.
For motor operating
characteristics under
various application
requirements - see
"Selection Guide"
tables on pages 4
and 5.
Positive
Metal-to-Metal
Sealing
Matched
Gerotor
Positive
Splined Drive
Lamina-
Bronze
Bearing
Surface
Needle
Bearing Six Styles of Mounts
(see page 2)
Sealed Against
Contamination
Lip Seal
6
Arrows show how
the shaft will sping
depending on fluid
flow through the
motor.