SNP3NN/048RN07SAP1BBBAZZNN/NNNNN Danfoss Gear Pump 48.3 cc 250 bar

Product Overview

The SNP3NN/048RN07SAP1BBBAZZNN/NNNNN is a high-performance fixed-displacement external gear pump from Danfoss (formerly Sauer-Danfoss / Sauer-Sundstrand) SNP3NN Series — Group 3. Manufactured by Danfoss’ Turolla brand in Italy, this series is widely recognized as a benchmark product in the mobile and industrial hydraulics industry.

Constructed with a high-strength extruded aluminum alloy body, aluminum cover, and flange, all pumps in this series feature pressure-balanced design for exceptional efficiency. The SNP3NN series offers 10 displacement options ranging from 22.1 to 88.2 cc/rev, with the 048 code on this model corresponding to 48.3 cc/rev.

Model Code Breakdown (SNP3NN/048RN07SAP1BBBAZZNN/NNNNN) :

Per Danfoss SNP3NN Series product coding system:

As an original Danfoss product, this pump offers direct interchangeability with equivalent SNP3NN series models, with fully compatible mounting dimensions and port interfaces.

Technical Specifications (Bulleted List)

• Brand: Danfoss (formerly Sauer-Danfoss / Sauer-Sundstrand)

• Series: SNP3NN — Group 3 Standard Series

• Pump Type: External gear, fixed displacement pump

• Displacement: 48.3 cm³/rev (2.93 in³/rev)

• Rated Continuous Pressure: Up to 250 bar (3,625 psi)

• Peak Pressure: Up to 270 bar (3,910 psi)

• Maximum Speed: Up to 3,000 RPM

• Minimum Speed: 600 – 800 RPM at rated pressure

• Body Material: High-strength extruded aluminum alloy (body, cover & flange)

• Gear Material: High-quality case-hardened steel

• Bearing Design: Pressure-balanced design + anti-friction alloy pressure plates

• Seal Material: NBR (standard)

• Mounting Flange: SAE B 2-bolt flange, pilot 101.6 mm

• Drive Shaft: SAE J498 13T 16/32 involute spline

• Ports: Square flange — inlet 55×27×55-M8 / outlet 55×18×55-M8

• Rotation Direction: Clockwise (R)

• Compatible Fluids: Mineral hydraulic oil

• Recommended Oil: ISO VG 32 / VG 46 anti-wear hydraulic oil

• Operating Temperature: Per Danfoss official temperature & viscosity requirements

Key Technical Advantages

1. Pressure-Balanced Design — The Key to Exceptional Efficiency

All SNP3NN series pumps feature pressure-balanced design with anti-friction alloy pressure plates on both sides of the gears, providing automatic axial clearance compensation. This design minimizes internal leakage and delivers exceptionally high volumetric efficiency under standard operating conditions — significantly outperforming fixed-clearance designs.

2. High-Strength Extruded Aluminum Alloy Housing — Lightweight & High Strength

The high-strength extruded aluminum alloy body, combined with aluminum cover and flange, delivers structural integrity while achieving significant weight reduction. Compared to cast iron housings, the aluminum alloy construction offers superior heat dissipation, helping to lower system operating temperatures and extend hydraulic fluid and seal service life.

3. High-Quality Case-Hardened Steel Gears — Long Life & High Reliability

Gears are manufactured from high-quality case-hardened steel with precision ground profiles, ensuring exceptional dimensional accuracy and surface hardness. This significantly enhances wear resistance and fatigue strength, maintaining stable operation even under peak pressures of 270 bar.

4. Flexible Multiple Pump Configuration Capability

The SNP3NN series supports multiple pump configurations in combination with SNP1NN, SNP2NN, and SNP3NN pumps. This modular design enables OEMs to integrate multiple hydraulic functions on a single drive input, reducing hose connections, potential leak points, and overall system assembly costs and space requirements.

5. Wide Displacement Range & High Pressure Rating

The SNP3NN series offers 10 displacement options from 22.1 to 88.2 cc/rev, with rated pressure up to 250 bar and peak pressure up to 270 bar. This broad displacement selection combined with high pressure capability makes the series suitable for a wide range of mobile equipment — from compact machines to large-scale construction machinery.

Application Areas

• Wheel Loaders — Boom lift, bucket tilt hydraulic systems

• Excavators — Auxiliary hydraulic systems, pilot oil supply

• Road Rollers — Vibration and travel hydraulic systems

• Tractors & Agricultural Machinery — Hydraulic lift, power steering

• Forklifts — Mast lift and tilt hydraulic systems

• Aerial Work Platforms — Boom extension and rotation systems

• Industrial Hydraulic Systems — Machine tool hydraulics, light industrial machinery

• Material Handling Equipment — Conveyors, lift platforms

Expert Maintenance Tips

1. Selection & Ordering Confirmation

• Confirm the complete model code: SNP3NN/048RN07SAP1BBBAZZNN/NNNNN

• Verify rotation direction (R = Clockwise) and drive shaft spline specification (SAE J498 13T 16/32)

• Confirm mounting flange specification (SAE B 2-bolt, pilot 101.6 mm) matches system requirements

2. Installation Requirements

• Shaft concentricity with the drive unit must be controlled within 0.1 mm

• Flexible coupling is recommended to avoid additional axial and radial loads from rigid connections

• For SAE B 2-bolt flange mounting, bolts must be evenly tightened in a diagonal pattern to prevent housing distortion or seal failure

• For spline shaft engagement, ensure smooth spline meshing — never force-fit

3. Piping & Filtration

• Inlet pipe diameter must not be smaller than the pump inlet port; piping should be as short as possible with minimal bends to avoid cavitation

• A filter must be installed on the inlet line per Danfoss specifications

• Thoroughly flush all piping with high-pressure oil before installation to prevent hard particle contamination

4. Pre-Start Checks

• Prime the pump by filling the housing with hydraulic oil before initial start-up

• Jog the motor to verify rotation direction is clockwise, matching pump marking; reverse rotation is strictly prohibited

• Recommended fluid: ISO VG 46 anti-wear hydraulic oil; use ISO VG 32 for low-temperature environments (<0°C)

5. Operation & Maintenance

• Maintain operating oil temperature and viscosity within Danfoss recommended ranges

• Replace hydraulic oil and filter after the first 500 hours of operation, then every 2,000 hours thereafter

• Periodically inspect pump housing connections for leaks; if abnormal noise or pressure instability occurs, shut down immediately for inspection