Danfoss 51 Series Motor | 51D080, 51D110, 51D160, 51D250 | High Pressure Bent Axis Motor

Danfoss 51 Series High-Pressure Bent Axis Variable Piston Motor

Product Overview: The Danfoss 51 series and the advanced 51-1 series are globally recognized benchmarks for high-performance variable displacement motors. Utilizing sophisticated Bent Axis technology, this series spans core displacements from 80cc (51D080) to the high-torque 250cc (51D250) configurations. Featured models like the 51D080-1-RD3NE2B1 are specifically engineered for closed-circuit hydrostatic transmissions, delivering exceptional starting torque and a vast speed modulation range under peak pressures up to 480 Bar. Its compact envelope and superior volumetric efficiency make it the premier choice for asphalt paver drives, rotary drilling rig power heads, and heavy industrial applications.

Key Technical Advantages:

• Exceptional Speed Modulation Range: Features a high maximum-to-minimum displacement ratio, allowing machinery to transition seamlessly from high-torque climbing to high-speed travel without mechanical gear shifting.

• Ultra-High Pressure Reliability: Rated for continuous operation at 450 Bar (6525 PSI) with peak capabilities reaching 480 Bar, ensuring structural integrity under extreme load cycles.

• High-Efficiency Bent Axis Design: The bent axis architecture offers lower frictional losses and higher mechanical efficiency than swashplate designs, delivering smoother torque output especially during low-speed startups.

• Integrated Control Systems (-RD3NE2B1): * Equipped with precise two-position, proportional, or pressure compensator control mechanisms.

  • Features premium sealing systems for maximum stability in high-temperature environments and diverse hydraulic fluid conditions.

• Rugged Industrial Configuration Codes:

  • NNU1 / NNN032AAE6: Represent customized shaft ends, mounting flanges (SAE standards), and sensor interfaces tailored for global OEM compatibility, ensuring 100% “plug-and-play” replacement.

Detailed Models & Parameters:

• Core Series: Danfoss 51 & 51-1 Series.

• Representative Models: 51D080, 51D110, 51D160, 51D250, 51D080-1-RD3NE2B1.

• Configuration Codes: NNU1, NNN032AAE6, 0000.

• Displacements: 80, 110, 160, 250 cm³/rev.

• Pressure Ratings: Continuous 450 Bar (6525 PSI); Peak cycles up to 480 Bar (6960 PSI).