SNM3NN/026BN01BAM1C7C7NNN/NNNNN Danfoss Gear Motor | 26cc 250 bar

Product Overview

The SNM3NN/026BN01BAM1C7C7NNN/NNNNN is a Group 3 large-frame high-performance bidirectional aluminum gear motor from the Danfoss (formerly Sauer-Danfoss / Turolla) GearMe® product line. This model features a displacement of 26 cc/rev and is designed with bidirectional capability, delivering excellent starting torque and the ability to operate with high back pressure and extremely low system pressure.

Constructed with a high-strength extruded aluminum body, aluminum rear cover, and aluminum front flange, the motor delivers an excellent balance of lightweight design and structural integrity. The hardened steel gears provide superior resistance to wear and contamination, while the pressure-balanced bearing design ensures maximum performance across the entire operating range. Teflon® coated bushings extend service life under extreme temperature, pressure, and speed conditions; the one-piece gear design minimizes deformation under pressure.

The SNM3NN series is available in three different frame sizes (Group 1, 2, and 3) with a wide range of European and SAE flange options to meet various machine requirements. Engineered as a direct OEM-replacement solution, the SNM3NN/026BN01BAM1C7C7NNN/NNNNN fully complies with Danfoss/Turolla original design standards and mounting interface specifications, offering 100% direct interchangeability with OEM motors. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention, volumetric efficiency, and internal leakage performance to meet or exceed OEM standards.

Complete Model Code Breakdown (Bulleted List) :

• SNM3NN — Series: Group 3 Standard Bi-directional Motor

• 026 — Displacement code: 26 cc/rev

• B — Design version/configuration group

• N — Port position configuration

• 01 — Flange type: European 4-bolt flange (01BA / 01DA / 01FA series)

• BA — Drive shaft type: Taper 1:8-M14X1.5, Key 5 mm

• M1 — Port configuration code

• C7C7 — Port specification: Diamond ports, 40mm PCD, 20×40×M8

• NNN/NNNNN — Standard seals and standard configuration

Danfoss Part Number: 121.25.097.00

Technical Specifications 

• Model: SNM3NN/026BN01BAM1C7C7NNN/NNNNN

• Danfoss Part Number: 121.25.097.00

• Series: SNM3NN (Group 3 Standard Bidirectional Gear Motor)

• Displacement: 26 cc/rev

• Rated Pressure (Continuous): 250 bar

• Peak Pressure (Intermittent): 270–280 bar

• Maximum Speed: 4000 rpm

• Minimum Speed: 500–700 rpm (depending on operating conditions)

• Maximum Output Torque: 290 N·m (01DA configuration)

• Rotation Direction: Bidirectional

• Flange Type: European 4-bolt flange, 98.4×128.1 mm, pilot Ø50.8 mm (Type 01)

• Shaft Type: Taper 1:8-M14X1.5, Key 5 mm

• Inlet/Outlet Ports: Diamond ports C7C7, 40mm PCD, 20×40×M8

• Port Position: Standard (NN)

• Seals: Standard NBR

• Valve Configuration: No valve (NNN)

• Housing Material: High-strength extruded aluminum

• Weight: Approx. 11–15 kg (Group 3 frame)

Key Technical Advantages

1. Bidirectional Design with High Back Pressure Capability
The SNM3NN series features bidirectional capability, enabling stable operation under high back pressure and extremely low system pressure. This makes it particularly suitable for hydraulic systems requiring frequent reversing or operating under high back pressure conditions.

2. Pressure-Balanced Bearing Design – Maximum Performance Across the Full Range
Pressure-balanced bearings ensure maximum performance across the entire operating range. This design maintains stable volumetric and mechanical efficiency regardless of load variations.

3. Teflon® Coated Bushings – Extended Service Life Under Extreme Conditions
Teflon® coated bushings extend service life under extreme temperature, pressure, and speed conditions. Combined with the one-piece gear design that minimizes deformation under pressure, this significantly enhances durability in demanding applications.

4. High-Strength Aluminum Construction – Lightweight & High Strength
The high-strength extruded aluminum body, rear cover, and front flange deliver maximum strength with low weight. The aluminum construction also provides excellent heat dissipation, reducing operating temperatures.

5. Excellent Starting Torque & High Efficiency
The SNM3NN series is designed to ensure excellent starting torque with significant improvements in overall efficiency. Using this motor to power work functions delivers noticeably lower energy consumption.

6. Rich Configuration Options & Modular Design
Supports a wide range of European 4-bolt and SAE flange mounting options. Group 1, 2, and 3 frames can be flexibly combined to form multi-pump assemblies, meeting the diverse requirements of complex hydraulic systems.

7. 100% Factory Tested & Direct Interchangeability
Every unit undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation. Fully compliant with Danfoss/Turolla original design standards, with flange dimensions, shaft specifications, and mounting interfaces identical to OEM motors—direct drop-in replacement with zero modifications required.

Application Areas

The SNM3NN/026BN01BAM1C7C7NNN/NNNNN gear motor is widely used in the hydraulic systems of the following equipment:

• Off-Highway Vehicles: Small, medium, and large off-highway vehicles

• Agricultural Machinery: Tractors, combine harvesters, sprayers, and agricultural equipment

• Construction Equipment: Excavators, loaders, and other mobile machinery

• Material Handling Equipment: Forklifts, lifting platforms, and handling systems

• Turf Care Equipment: Turf care machinery

• Aerial Equipment: Aerial work platforms

• Industrial Hydraulic Systems: Hydraulic power units (HPU)

Expert Maintenance Tips

1. Model Confirmation
The SNM3NN/026BN01BAM1C7C7NNN/NNNNN belongs to the Group 3 frame size with 26 cc/rev displacement. The series also includes 022, 033, 038, 044, 048, 055, 063, 075, and 090 displacement options. Before installation, confirm the correct displacement based on system torque requirements and verify the complete model code on the motor nameplate along with the Danfoss part number (121.25.097.00).

2. Rotation Direction Confirmation
The SNM3NN is a bidirectional motor, supporting both clockwise and counter-clockwise rotation. Before installation, verify that the system oil flow direction matches the motor’s rotation direction.

3. Installation Precautions

• Thoroughly clean the European 4-bolt flange and taper shaft mating surfaces before installation to ensure no debris remains

• Flange type is 01 (European 4-bolt flange, 98.4×128.1 mm, pilot Ø50.8 mm)

• Shaft type is BA (Taper 1:8-M14X1.5, Key 5 mm)

• Use Danfoss-specified torque values for mounting bolts (M14×1.5 recommended torque: 75-85 N·m)

• Ensure correct connection of inlet/outlet ports (C7C7 diamond ports, 40mm PCD, 20×40×M8)

4. First Start-Up and Bleeding

• Before first start-up, must fill the motor with hydraulic oil through the inlet port—never start dry

• After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system

• Check for abnormal noise or leakage—aluminum housing motors are particularly sensitive to cavitation

5. Fluid and Filtration

• Use high-quality anti-wear hydraulic oil compliant with DIN 51524 standards

• Maintain system oil cleanliness to ISO 4406 18/15 or better

• Aluminum gear motors are sensitive to contamination—install a high-quality filter in the inlet line

• Maintain operating temperature within recommended range

6. Periodic Maintenance

• Check mounting bolt torque every 1,000 operating hours

• Regularly monitor system operating pressure—not to exceed 250 bar rated pressure (270-280 bar peak)

• Regularly inspect shaft seals to prevent leakage

• If torque output decreases, noise levels increase abnormally, or system temperature rises excessively, inspect and replace worn components promptly