51V160RF1CN2NNNNA0NNN115AANN000 Danfoss Hydraulic Motor 160cc 420bar

Product Overview

The 51V series is a key member of the Danfoss Sauer Series 51 bent-axis variable displacement axial piston motor family. 51V denotes Variable Displacement motors, featuring advanced bent-axis design with spherical pistons and synchronizing gears. The angle between the cylinder block and the output shaft can be varied between 32° and 6°, providing a 5:1 maximum-to-minimum displacement ratio.

The 51V160 is the 160 cm³ mid-to-large displacement model in this series, equipped with 51V proportional control for stepless displacement regulation. Motors typically start at maximum displacement to provide maximum starting torque for rapid acceleration; as speed increases, displacement automatically decreases, enabling smooth transition from low-speed high-torque to high-speed light-load operation. The Series 51 is primarily designed for integration with other products to form closed-circuit systems for hydraulic power transmission and control.

Our product provides a fully interchangeable direct replacement for the original Danfoss Sauer 51V series motor, with identical mounting dimensions, port specifications, and shaft configurations. Every unit undergoes 100% simulated duty-cycle testing—performance-validated under rated pressure, peak pressure, and full speed range to ensure volumetric efficiency, mechanical efficiency, torque output, noise levels, and thermal characteristics meet or exceed original OEM specifications.

Model 1: 51V160RF1CN2NNNNA0NNN115AANN000

Technical Specifications 

• Full Model: 51V160RF1CN2NNNNA0NNN115AANN000

• Brand: Danfoss Sauer

• Series: Series 51 Variable Motor

• Motor Type: 51V160

• Rotation: R = Right-hand (Clockwise)

• Max. Displacement (Vg max): 160 cm³/rev (9.82 in³/rev)

• Min. Displacement (Vg min): 32 cm³/rev

• Displacement Ratio: 5:1

• Max. Pressure: 420 bar

• Peak Pressure: 480 bar

• Max. Speed: 5,000 rpm

• Rated Speed: 2,200–5,600 rpm

• Speed Range: 2,200–7,000 rpm

• Control Type: Proportional Control

• Input Shaft: F1 = 13T 8/16 Pitch Spline

• Controls: N2 = Hydraulic 2-Position Control

• Servo Pressure: NN = For Special Controls

• Loop Flushing: NN = No Loop Flushing Function

• Endcap Ports: R = Side SAE Ports

• Min. Displacement Setting: 085 = 85 cm³

• Max. Displacement Setting: N = 100% Maximum

• Flushing Shuttle Spool: AA = 6.2 bar

• Mounting: SAE Flange / Cartridge / DIN Flange

• Housing Material: High-Strength Cast Iron

• Weight: Approx. 50–70 kg (depending on configuration)

Key Technical Advantages

1. Bent-Axis Design with Spherical Pistons — Industry-Leading Technology
The Series 51 features a proven bent-axis design concept with spherical pistons and synchronizing gears. The ball end of each piston runs in a socket bushing pressed into the output shaft, with no other parts used to connect the pistons to the shaft. This design significantly reduces internal leakage, improves volumetric efficiency, and provides excellent shock and thermal shock resistance.

2. 5:1 Displacement Ratio
The angle between the cylinder block and output shaft varies between 32° and 6°, delivering a 5:1 displacement ratio (160 cm³ : 32 cm³). The motor starts at maximum displacement for maximum starting torque and rapid acceleration; under the same input conditions at minimum displacement, shaft speed increases approximately fivefold. This enables flexible adaptation across a wide range of speed and torque requirements.

3. Ultra-High Pressure & Speed Capability
Withstands system pressures up to 420 bar and peak pressures up to 480 bar, delivering output speeds up to 5,000 rpm. The combination of high pressure and high speed delivers exceptional power density in a compact package.

4. Complete Control Family & Versatile Configurations
Offers a complete family of controls and regulators — proportional control, hydraulic 2-position control, pressure compensators, and more. The pressure compensator activates in both motor and pump modes. Available in SAE, cartridge, and DIN flange configurations, specifically designed for direct mounting into compact planetary drives.

5. Proven Reliability & Performance
The Series 51 motors have been validated in tens of thousands of construction and agricultural machines worldwide. Two tapered roller bearings support the output shaft, ensuring long-term reliable operation.

Application Areas

The 51V160 motor is widely used in closed-circuit hydrostatic transmission systems:

• Forestry Machinery: Hydrostatic travel drives for Ponsse, Timberjack, and Valmet forwarders and harvesters

• Agricultural Machinery: Chassis travel drives for Claas Lexion and New Holland CR series combine harvesters

• Compaction Equipment: Hydrostatic travel drives for Dynapac CA series and Bomag BW series heavy soil compactors

• Construction Equipment: Tracked bulldozer and excavator travel drives

• Industrial Drives: Closed-circuit hydrostatic transmission systems

Expert Maintenance Tips

1. Shaft seals and all O-rings must be replaced after every disassembly.

2. Pre-lubricate all moving parts with clean hydraulic fluid before assembly.

3. Purge all air from the motor housing and prime with hydraulic oil before initial start-up to prevent dry-start damage.

4. Monitor case drain flow regularly — an abnormal increase indicates potential piston, cylinder, or bearing wear.

5. The Series 51 features a 5:1 displacement ratio — verify displacement control mechanism calibration and response characteristics on a test bench after service.

6. Ensure hydraulic system filtration meets Danfoss specifications (recommended β₁₀ ≥ 75, ISO 4406 cleanliness code不低于 18/16/13) to maximize motor service life.

7. If equipped with a pressure compensator, regularly verify the compensator setting and its low pressure rise characteristics.

Model 2: 51V160RF1NHSA2BHE1NNN058AANN1012

Product Overview

The 51V160RF1NHSA2BHE1NNN058AANN1012 is a 160 cm³ displacement model in the Danfoss Sauer Series 51 bent-axis variable displacement axial piston motor family. Sharing the same foundational platform and core technical specifications as Model 1, this model features different control options, shaft configurations, and seal materials to accommodate diverse application requirements.

Our product provides a fully interchangeable direct replacement for the original Danfoss Sauer 51V160 series motor, with identical mounting dimensions, port specifications, and shaft configurations. Each unit undergoes 100% simulated duty-cycle testing—performance-verified at rated pressure, peak pressure, and full speed range to ensure all performance indicators meet or exceed OEM specifications.

Technical Specifications (Bulleted List)

• Full Model: 51V160RF1NHSA2BHE1NNN058AANN1012

• Brand: Danfoss Sauer

• Series: Series 51 Variable Motor

• Motor Type: 51V160

• Rotation: R = Right-hand (Clockwise)

• Max. Displacement (Vg max): 160 cm³/rev (9.82 in³/rev)

• Min. Displacement (Vg min): 32 cm³/rev

• Displacement Ratio: 5:1

• Max. Pressure: 420 bar

• Peak Pressure: 480 bar

• Max. Speed: 5,000 rpm

• Rated Speed: 2,200–5,600 rpm

• Speed Range: 2,200–7,000 rpm

• Control Type: Proportional Control

• Input Shaft: F1 = 13T 8/16 Pitch Spline

• Controls: NHS = Hydraulic Proportional Control (Special Configuration)

• Servo Pressure: A2 = Specific Servo Pressure Configuration

• Endcap Ports: BHE1 = Special Endcap Port Configuration

• Min. Displacement Setting: 058 = 58 cm³

• Mounting: SAE Flange / Cartridge / DIN Flange

• Housing Material: High-Strength Cast Iron

• Weight: Approx. 50–70 kg (depending on configuration)

Key Technical Advantages

1. Bent-Axis Design with Spherical Pistons — Industry-Leading Technology
The Series 51 features a proven bent-axis design concept with spherical pistons and synchronizing gears. The spherical piston design significantly reduces internal leakage, improves volumetric efficiency, and provides excellent shock and thermal shock resistance.

2. 5:1 Displacement Ratio
The angle between the cylinder block and output shaft varies between 32° and 6°, delivering a 5:1 displacement ratio (160 cm³ : 32 cm³). The motor starts at maximum displacement for maximum starting torque and rapid acceleration; under the same input conditions at minimum displacement, shaft speed increases approximately fivefold.

3. Ultra-High Pressure & Speed Capability
Withstands system pressures up to 420 bar and peak pressures up to 480 bar, delivering output speeds up to 5,000 rpm.

4. Complete Control Family & Versatile Configurations
Available in SAE, cartridge, and DIN flange configurations. The pressure compensator option features low pressure rise (short ramp) characteristics, ensuring optimal power utilization across the entire displacement range.

5. Proven Reliability & Performance
Two tapered roller bearings support the output shaft, ensuring long-term reliable operation. The Series 51 motors have been validated in tens of thousands of construction and agricultural machines worldwide.

Application Areas

The 51V160 motor is widely used in closed-circuit hydrostatic transmission systems:

• Forestry Machinery: Hydrostatic travel drives for Ponsse, Timberjack, and Valmet forwarders and harvesters

• Agricultural Machinery: Chassis travel drives for Claas Lexion and New Holland CR series combine harvesters

• Compaction Equipment: Hydrostatic travel drives for Dynapac CA series and Bomag BW series heavy soil compactors

• Construction Equipment: Tracked bulldozer and excavator travel drives

• Industrial Drives: Closed-circuit hydrostatic transmission systems

Expert Maintenance Tips

1. Shaft seals and all O-rings must be replaced after every disassembly.

2. Pre-lubricate all moving parts with clean hydraulic fluid before assembly.

3. Purge all air from the motor housing and prime with hydraulic oil before initial start-up to prevent dry-start damage.

4. Monitor case drain flow regularly — an abnormal increase indicates potential piston, cylinder, or bearing wear.

5. The Series 51 features a 5:1 displacement ratio — verify displacement control mechanism calibration and response characteristics on a test bench after service.

6. Ensure hydraulic system filtration meets Danfoss specifications (recommended β₁₀ ≥ 75, ISO 4406 cleanliness code不低于 18/16/13) to maximize motor service life.

7. Weight is approximately 50–70 kg — use proper lifting equipment during installation and removal to prevent personal injury or component damage.