Bosch Rexroth A6VM Variable Piston Motor

The Bosch Rexroth A6VM Series is a highly versatile, variable displacement axial piston motor featuring a robust bent-axis design. Designed for both open and closed-circuit operations, it is the perfect companion to high-pressure hydraulic pumps (like the A4VG series) in hydrostatic transmissions. With a wide displacement range (from size 28 to 355) and a massive control range, the A6VM delivers exceptional starting torque and smooth low-speed performance, making it the industry standard for heavy mobile machinery and industrial winches.

Key Features:

Series: A6VM (Variable Displacement, Bent-Axis)
Sizes Available: 28, 55, 80, 107, 160, 200, 250, 355
Max. Pressure: 400 bar (Nominal) / 450 bar (Peak)
Model Highlight: A6VM107EZ4/63W-VAB027B
Application: Hydrostatic drives, winches, and track drives.

Product Overview The Rexroth A6VM Variable Motor is engineered to convert hydraulic energy into mechanical power with maximum efficiency. Its signature bent-axis design allows for a large swivel angle, providing a wide control range (from maximum displacement to zero). When displacement is reduced to zero, the motor can achieve extremely high rotational speeds, making it ideal for vehicles that require both high tractive effort (high torque at low speed) and fast travel speeds on the road.

Why Choose the Rexroth A6VM Series?

High Starting Torque: The bent-axis design ensures minimal mechanical friction, delivering excellent starting torque to move heavy loads smoothly from a standstill.
Wide Control Range: The variable displacement capability allows machines to infinitely adjust speed and torque to match the load requirements, saving energy.
Extensive Control Options: Available with various control modules, including Proportional Electric (EP), Hydraulic Proportional (HP), Two-point Electric (EZ), and Pressure Control (HA), ensuring seamless integration into any control system.
Compact & Robust: Features a space-saving design with highly durable tapered roller bearings that can withstand significant radial and axial forces.

Common Applications:

Mobile Hydraulics: Track drives for excavators, wheel drives for loaders, and winch drives for cranes.
Mining & Drilling: Rotary heads for drill rigs, heavy-duty conveyors.
Industrial: Shredder drives, heavy-duty presses, and test rigs.

Specification	Value / Description
Product Type	Variable Displacement Axial Piston Motor
Design Type	Bent-axis design (For open and closed circuits)
Series	A6VM (Series 63)
Available Sizes ( $V_{g max}$ )	28, 55, 80, 107, 160, 200, 250, 355 cm³/rev
Nominal Pressure	400 bar (5800 psi)
Peak Pressure	450 bar (6500 psi)
Model Breakdown	A6VM 107 EZ4 / 63 W – V A B027 B
– A6VM	Axial piston motor, variable displacement, bent-axis
– 107	Size: 107 cc/rev
– EZ4	Control: Two-point electric control (switching solenoid)
– 63	Series: 63
– W	Direction of Rotation: Bi-directional
– V A	FKM (Viton) seals, Splined shaft (DIN 5480)
– B027 B	Port plate design and integrated flush valve/counterbalance valve options