Catalog excerpts
Available in .5,1.0, 2.2, 5.0, 7.6, and 10 cu. in. displacementUNIQUE ROL-VANE MOTOR PRINCIPLE. Key to the Hartmann Rol-Vane Motor’s high torque - low speed operation and instant reversibility is the Rol-Vane principle. The motor’s dual-vane rotor and timed interval valving create a hydraulically balanced unit, eliminating radial bearing loads - a major cause of hydraulic motor wear. HOW ROL-VANE WORKS Hydraulic fluid from the supply line flows to the rotor shaft via a combined body and shaft groove. Passages within the rotor shaft direct the pressurized fluid ( shaded area) radially into...
Open the catalog to page 2OPERATING CHARACTERISTICS THE ROL-VANE HYDRAULIC MOTOR is an efficient and compact means of applying variable speed rotary hydraulic power. LINEAR OUTPUT TORQUE with constant input pressure. The pulseless torque is created by having a constant area operated on by a constant pressure at a constant radius. SYMMETRICAL REVERSIBILITY is obtained by having identical flow paths within the motor. SELF-LUBRICATION provided by the driving fluid. BALANCED PRESSURE AREAS and the elimination of mechanical rubbing surfaces minimizes breakaway friction torque loss permitting maximum stall torque, inching...
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