BRUENINGHAUS HYDROMATIK A2FM125 HYDRAULIC MOTOR

The Brueninghaus Hydromatik A2FM125 Hydraulic Motor is a genuine bent-axis, fixed displacement piston motor, manufactured under the Rexroth part number A2FM125/61W-VAB027D (additional reference numbers 4618869 and 211.22.01.69). It’s built to convert hydraulic flow into rotational torque with high starting efficiency, making it a common choice for swing drives, track drives, and other rotational functions on heavy construction and industrial equipment.

With a geometric displacement of 125 cm³ per revolution, this motor is rated for a nominal working pressure of 400 bar and a maximum pressure of 450 bar, giving it the torque capacity needed for demanding applications like excavator track and swing drives, crawler cranes, and drilling rigs. Its bent-axis fixed displacement design means output speed scales directly with input flow while torque tracks system pressure — a straightforward relationship that gives predictable, reliable performance under shock loading and frequent direction reversals. At roughly 27 kg, the motor’s compact, high-power-density construction suits tight installation spaces without compromising output.

Because fixed displacement motors like this one operate at the core of a machine’s drive or swing circuit, using the genuine Rexroth/Brueninghaus Hydromatik unit rather than a mismatched substitute matters for maintaining correct torque output and preventing internal leakage. Worn seals or degraded rotating group components in a motor at this pressure rating can quickly translate into reduced swing torque, sluggish response, or uneven power delivery between paired motors — issues that are far more expensive to trace and fix than the cost of fitting the correct OEM replacement from the start.

Technical Features

• Genuine Brueninghaus Hydromatik / Rexroth-spec piston motor
• Model: A2FM125/61W-VAB027D
• Reference numbers: 4618869, 211.22.01.69
• Displacement: 125 cm³ per revolution
• Nominal pressure: 400 bar | Maximum pressure: 450 bar
• Bent-axis, fixed displacement design for predictable torque/speed output
• Approx. weight: 27 kg
• High starting torque, suited to shock loads and frequent reversals

Compatible Applications

• Excavator swing drives and track drives
• Crawler cranes and drilling rigs
• Hydrostatic transmission and industrial rotational drive systems

Alternative Part Numbers

• Volvo 11147935 Hydraulic Motor
• Danfoss OML 20 Hydraulic Motor
• Rexroth A2FM90/61W-VAB027 Hydraulic Motor

Shop & Supply stocks the Brueninghaus Hydromatik A2FM125 Hydraulic Motor for immediate dispatch, alongside a full range of genuine Rexroth, Volvo, and Danfoss hydraulic motors for construction and industrial equipment. Fitting the original part means the exact displacement, pressure rating, and internal tolerances your drive system was engineered around — consistent torque delivery without the guesswork of an unverified substitute.