Rexroth A6VM Axial Piston Variable Motor
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Advantages of the Rexroth A6VM Axial Piston Variable Motor
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High Efficiency – Optimized piston geometry and low-friction design reduce energy loss and improve system performance.
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Variable Displacement – Allows for flexible speed and torque output to match varying operating loads.
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High Power Density – Compact structure provides strong output torque even in limited installation spaces.
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Durable & Reliable – Rugged construction ensures long service life in high-pressure and continuous-duty environments.
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Wide Application Flexibility – Suitable for winches, conveyors, wheel drives, slew drives, crane hydraulics, and more.
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Smooth Operation – Advanced control and precision components deliver low-noise, stable motion, and excellent dynamic response.
| Parameter | Value / Range |
|---|---|
| Design / Type | Axial piston variable motor |
| Nominal Pressure (pₙ) | Up to 400 bar for many sizes |
| Maximum Pressure (pₘₐₓ) | ~ 450 bar for many sizes |
| Displacement (Vgₘₐₓ) | Common sizes: 28.1, 54.8, 80, 107, 140, 160 cm³/rev |
| Minimum Displacement (Vgₘᵢₙ) | 0 cm³/rev for many models (i.e. can “swivel to zero”) |
| Critical Displacement (Vgₓ) | (value where speed limit changes) e.g. for A6VM55: ~ 35 cm³ |
| Max Speed at Vgₘₐₓ (nₙₒₘ) | – A6VM28: ~ 5550 rpm – A6VM55: ~ 4450 rpm – A6VM80: ~ 3900 rpm; A6VM107: ~ 3550 rpm; A6VM140: ~ 3250 rpm; A6VM160: ~ 3100 rpm |
| Max Speed at Vg < Vgₓ | e.g. A6VM55: ~ 7000 rpm; A6VM80: ~ 6150 rpm; A6VM107: ~ 5600 rpm; A6VM140: ~ 5150 rpm; A6VM160: ~ 4900 rpm. |
| Inlet Flow (qᵥ) at nₙₒₘ | e.g. ~ 156 L/min for 28cc; ~ 244 L/min for 55cc; ~312 L/min for 80cc; ~380 L/min for 107cc; ~455 L/min for 140cc; ~496 L/min for 160cc. |
| Torque (Δp = 400 bar) | e.g. 179 Nm (28cc), 349 Nm (55cc), 509 Nm (80cc), 681 Nm (107cc), 891 Nm (140cc), 1019 Nm (160cc) |
| Rotary Stiffness (Vgₘₐₓ to Vgₘₐₓ/2) | Example (from A6VM-series): for NG55 ~ 10 kNm/rad, for NG80 ~ 16 kNm/rad, etc. |
| Weight | Depends on size — e.g. ~26 kg for 55cc, ~34 kg for 80cc, ~47 kg for 107 cc |
| Operating Circuits | Suitable for both open and closed circuits. |
| Control Options | Multiple: hydraulic, electro-hydraulic, with optional counterbalance valve, flush/boost valve, etc. |