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VANE CROSSING VANE
The Rineer patented vane crossing vane design produces much higher volumetric and mechanical efficiencies than is possible with a standard vane type design. This design provides a sealing vane between cavities to improve mechanical and volumetric efficiencies.
STARTING AND STALL TORQUE
The Rineer motor produces torque curves which are virtually flat with starting and stall torque equal to approximately 90-94% of theoretical torque.
SEALS
Buna N seals are supplied as standard on the Rineer motors. Viton seals may be ordered as an option.
FILTRATION
25 micron minimum
FLUID
We suggest premium grade fluids containing high quality rust, oxidation and foam inhibitors, along with anti-wear additives. For best performance, minimum viscosity should be maintained at 100 SSU or higher. Fluid temperature should not exceed 180o F. Elevated fluid temperature will adversely affect seal life while accelerating oxidation and fluid breakdown. Fire resistent fluids may be used with certain limitations. Contact Rineer for additional information.
CASE DRAIN
The 125 Series Motor is designed for external case drain. Two 1/2 inch o-ring boss ports are supplied; use the port at the highest elevation. We recommend case drain pressure of 35 PSI or less when using standard seals.
CASE DRAIN CIRCULATION
Fluid should be circulated through the case when a temperature differential exists between the motor and the system in excess of 50o F. Should this occur, contact a Rineer Application Engineer.
CASE DRAIN AND CROSS PORT LEAKAGE
The combined case drain and cross port leakage of the single stacked motor is approximately 1 to 1-1/2 GPM per 1,000 PSI, while the double stacked motor is approximately 2 GPM per 1,000 PSI. This will vary with the oil viscosity and internal clearance selection.
ROTATION
The 125 Series Motor rotates equally well in either direction and smoothly throughout its entire pressure and speed range. Viewing the output shaft, rotation is clockwise when oil is supplied to the port nearest to the shaft.

MORE POWER STROKES PER REVOLUTION
The 125 Series has six stator cavities and 16 rotor vanes. Each rotor vane works in each stator cavity once per revolution, which results in 96 power strokes per revolution. This helps produce higher mechanical efficiency and flatter torque curves.
HORSEPOWER LIMITATION
Maximum horsepower limitation may vary with different applications. When using the 125 Series standard motor above 300 HP, consult a Rineer Application Engineer.
SINGLE STACKED, DOUBLE STACKED
Single stacked motors have displacements ranging from 60 in3 to 125 in3 and are comprised of a single rotor stator package located between two housings. Double stacked motors have displacements ranging from 150 in3 to 250 in3 and are comprised of two rotor stator packages located between two housings. Any of the single stacked rotor stator packages may be placed together to form a double stacked motor.
DOUBLE KEY, DOUBLE SPLINED
The 125 Series is available with the standard 3-1/2 inch keyed or splined shaft extending through both the front and rear housings.
FEMALE KEY, FEMALE SPLINE
The female key and female spline shaft configurations are available only in the single stack 60 in3 through 125 in3 displacement motors.
HOUSING OPTIONS
The standard 125 Series motors have one six-bolt front housing and one rear housing. Special 125 Series motors are available with two six-bolt front housings or two rear housings. The rear housing is provided with six each 5/8-11 mounting threads on a 8.750 bolt circle.
BEARING LOADING OPTIONS
The bearings in the standard 125 Series motor can accept radial load per the radial capacity chart located in the BEARING section of this site. Thrust style motors are also available with tapered thrust bearings. See bearing charts for thrust loading capacities. See 125 Code 62 High Pressure series motors for additional heavy duty thrust bearing packages including drill motors. For additional thrust-type applications, contact Rineer for optional bearing configurations.
MOUNTING
The mounting position is unrestricted. The shafts, pilots, and mounting faces should be within .002 TIR.
INTERMITTENT CONDITIONS
Intermittent conditions are to be less than 10% of every minute.
125 SERIES STD DATA