Aluminum gear motors including fan drives

  • Overview
  • Product range
  • Documents
  • Related products
  • Related applications
  • Related solutions

Available in many sizes

Our aluminum gear motors are the ideal choice for a wide range of applications - from small to medium and large off-highway vehicles.

Available in three different frame sizes our aluminum gear motors feature high strength extruded aluminum housings, an aluminum rear cover and a front flange for a maximum strength and a low weight.

A broad variety of configurations are available with European or SAE flange options to meet widely varying machine requirements.

Our gear motors are designed to achieve significant improvement in overall efficiency. Use them to power your work functions and see your energy consumption reach a new low.

Our fixed displacement aluminum gear motors put your machine to work – providing maximum strength at minimum weight in the right frame size for your requirements.

Product range

Aluminum gear motor Gr 1
  • A high efficiency and a light weight aluminum construction
  • Pressure balanced bearing blocks for maximum performance across operating range
  • Teflon® coated bushings extend life under extreme temperature, pressure and speed conditions
  • One piece gears minimize deflection under pressure
  • An excellent starting torque

    Frame size Frame size Frame size Frame size Frame size Frame size Frame size Frame size
    2,6 3,2 3,8 4,3 6,0 7,8 010 012
Displacement cm3/rev
[in3/rev]
2.62
[0.158]
3.14
[0.195]
3.66
[0.231]
4.19
[0.262]
5.89
[0.366]
7.59
[0.463]
9.94
[0.607]
12
[0.732]
SKM1NN
(a standard, bidirectional motor)
                 
Peak pressure bar
[psi]
270
[3915]
270
[3915]
270
[3915]
270
[3915]
250
[3625]
220
[3190]
180
[2610]
150
[2175]
Rated pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3335]
200
[2900]
160
[2320]
130
[1895]
Back pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3335]
200
[2900]
160
[2320]
130
[1895]
Min speed min-1
(rpm)
1000 1000 1000 800 800 800 800 800
Max speed min-1
(rpm)
4000 4000 3000 3000 2000 2000 2000 2000
SKU1NN
(a standard, unidirectional motor)
                 
Peak pressure bar
[psi]
270
[3915]
270
[3915]
270
[3915]
270
[3915]
250
[3625]
220
[3190]
170
[2465]
140
[2030]
Rated pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3335]
200
[2900]
150
[2175]
120
[1740]
Min speed min-1
(rpm)
1000 1000 1000 800 800 800 800 800
Max speed min-1
(rpm)
4000 4000 3000 3000 2000 2000 2000 2000
SNU1NN 
(a standard, unidirectional motor)
                 
Peak pressure bar
[psi]
270
[3915]
270
[3915]
270
[3915]
270
[3915]
190
[2755]
180
[2610]
- -
Rated pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
170
[2465]
160
[2320]
- -
Min speed min-1
(rpm)
1000 1000 1000 800 800 800 - -
Max speed min-1
(rpm)
4000 4000 3000 3000 2000 2000 - -
 All                  
Weight kg
[lb]
1.02
[2.26]
1.14
[2.51]
1.18
[2.60]
1.20
[2.65]
1.30
[2.87]
1.39
[3.06]
1.55
[3.42]
1.65
[3.64]
Moment of inertia of rotating components x 10-6 kg•m2
[x 10-6 lbf•ft2]
5.1
[121.0]
5.7
[135.2]
6.4
[151.9]
7.1
[168.5]
9.3
[220.7]
11.4
[270.5]
14.6
[339.4]
17.1
[405.8]

1kg•m2 = 23.68 lb•ft2

Aluminum gear motor Gr 1
Aluminum gear motor Gr 2
  • A high efficiency and a light weight aluminum construction
  • Pressure balanced bearing blocks for maximum performance across operating range
  • Teflon® coated bushings extend life under extreme temperature, pressure and speed conditions
  • One piece gears minimize deflection under pressure
  • An excellent starting torque

    Frame size Frame size Frame size Frame size Frame size Frame size Frame size Frame size
    6,0* 8,0 011 014 017 019 022 025
Displacement cm3/rev
[in3/rev]
6.0
[0.36]
8.4
[0.513]
10.8
[0.659]
14.4
[0.879]
16.8
[1.025]
19.2
[1.171]
22.8
[1.391]
25.2
[1.538]
SNM2NN
(bidirectional motor)
                 
Peak pressure bar
[psi]
280
[4060]
280
[4060]
280
[4060]
280
[4060]
260
[3770]
230
[3335]
200
[2900]
180
[2610]
Rated pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3335]
210
[3045]
180
[2610]
160
[2320]
Outlet back pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3335]
210
[3045]
180
[2610]
160
[2320]
Min speed min-1
(rpm)
700 700 700 700 500 500 500 500
Max speed min-1
(rpm)
4000 4000 4000 4000 4000 3500 3500 3500
SNU2NN
(unidirectional motor)
                 
Peak pressure bar
[psi]
- 280
[4060]
280
[4060]
280
[4060]
260
[3770]
230
[3335]
200
[2900]
180
[2610]
Rated pressure bar
[psi]
- 250
[3625]
250
[3625]
250
[3625]
230
[3335]
210
[3045]
180
[2610]
160
[2320] 
Min speed min-1
(rpm)
- 600 600 600 500 500 500 500
Max speed min-1
(rpm)
- 3500 3500 3500 3000 3000 3000 2500
SKU2NN
(unidirectional motor)
                 
Peak pressure bar
[psi]
- 280
[4060]
280
[4060]
280
[4060]
260
[3770]
230
[3335]
200
[2900]
180
[2610]
Rated pressure bar
[psi]
- 250
[3625]
250
[3625]
250
[3625]
230
[3335]
210
[3045]
180
[2610]
160
[2320] 
Min speed min-1
(rpm)
- 600 600 600 500 500 500 500
Max speed min-1
(rpm)
- 3500 3500 3500 3000 3000 3000 2500
All
(SNM2NN, SNU2NN, SKU2NN)
                 
Weight kg
[lb]
2.4
[5.3]
2.5
[5.5]
2.7
[5.5]
2.9
[6.3]
3.0
[6.5]
3.1
[6.7]
3.2
[7.0]
3.3
[7.3]
Moment of inertia of rotating components x 10-6 kg•m2
[x 10-6 lbf•ft2]
26.5
[629]
32.4
[769]
38.4
[911]
47.3
[1122]
53.3
[1265]
59.2
[1405]
68.1
[1616]
74.1
[1758]
Theoretical flow at max speed l/min
[US gal/min]
24
[6.3]
33.6
[8.9]
43.2
[11.4]
50.4
[13.3]
50.4
[13.3]
57.6
[15.2]
68.4
[18.0]
75.6
[20.0]

1kg•m2 = 23.68 lb•ft2
 

Aluminum gear motor Gr 2
Aluminum gear motor Gr 3
  • A high efficiency and a light weight aluminum construction
  • Pressure balanced bearing blocks for maximum performance across operating range
  • Teflon® coated bushings extend life under extreme temperature, pressure and speed conditions
  • One piece gears minimize deflection under pressure
  • An excellent starting torque 

    Frame size Frame size Frame size Frame size Frame size Frame size Frame size Frame size Frame size Frame size
    022 026 033 038 044 048 055 063 075 090
Displacement cm3/rev
[in3/rev]
22.1
[1.35]
26.2
[1.60]
33.1
[2.02]
37.9
[2.32]
44.1
[2.69]
48.3
[2.93]
55.2
[3.36]
63.4
[3.87}
74.4
[4.54]
88.2
[5.38]
SNU3NN (unidirectional)                      
Peak pressure bar
[psi]
270
[3915]
270
[3915]
270
[3915]
270
[3915]
270
[3915]
250
[3625]
230
[3336]
210
[3045]
190
[2755]
170
[2465]
Rated pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3336]
210
[3045]
190
[2755]
170
[2465]
150
[2175]
Min speed min-1
(rpm)
800 800 800 800 800 800 800 800 800 800
Max speed min-1
(rpm)
2500 2500 2500 2500 2300 2300 2300 2300 2100 2100
SNM3NN (bidirectional) motor in parallel                      
Peak pressure bar
[psi]
270
[3915]
270
[3915]
270
[3915]
270
[3915]
270
[3915]
250
[3625]
230
[3336]
210
[3045]
190
[2755]
170
[2465]
Rated pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3336]
210
[3045]
190
[2755]
170
[2465]
150
[2175]
Min speed min-1
(rpm)
800 800 800 800 800 800 800 800 800 800
Max speed min-1
(rpm)
2500 2500 2500 2500 2300 2300 2300 2300 2100 2100
SNM3NN (bidirectional) motor in series                      
Peak pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3336]
210
[3045]
190
[2755]
170
[2465]
150
[2175]
Rated pressure bar
[psi]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
250
[3625]
230
[3336]
210
[3045]
190
[2755]
170
[2465]
150
[2175]
Min speed min-1
(rpm)
800 800 800 800 800 800 800 800 800 800
Max speed min-1
(rpm)
2500 2500 2500 2500 2300 2300 2200 2100 2100 2100
All (SNU3NN, SNM3NN)                      
Weight kg
[lb]
6.8
[15.0]
6.8
[15.0]
7.2
[15.8]
7.3
[16.1]
7.5
[16.5]
7.6
[16.8]
7.8
[17.3]
8.1
[17.9]
8.5
[18.7]
8.9
[19.6]
Moment of inertia of rotating components x 10-6 kg•m2
[x 10-6 lbf•ft2]
198
[4698]
216
[5126]
246
[5837
267.2
[6341]
294.2
[6981]
312.2
[7408]
342.3
[8123]
378.3
[8977]
426.4
[10118]
486.5
[11545]

1kg•m2 = 23.68 lb•ft2

Aluminum gear motor Gr 3
Aluminum fan drive motor Gr 2
  • An integrated dust cover to extend product life by preventing dirt ingression across the shaft seal
  • An enhanced gear teeth machining and special coating to reduce noise levels to boost operator comfort
  • EH proportional valve integrated in the rear casting to provide more uniform performance over the entire operating temperature range
  • PLUS+1® Compliant technology to ensure all electro-hydraulic products integrate seamlessly in a customized control system

Frame size   8,0 011 014 017 019 022 025
Displacement cm3/rev
[in3/rev]
8.4
[0.51]
10.8
[0.66]
14.4
[0.88]
16.8
[1.03]
19.2
[1.17]
22.8
[1.39]
25.2
[1.54]
Peak pressure bar
[psi]
270
[3916]
270
[3916]
270
[3916]
250
[3626]
230
[3336]
210
[3046]
180
[2610]
Rated pressure bar
[psi]
250
[3626]
250
[3626]
250
[3626]
230
[3336]
210
[3046]
180
[2610]
160
[2320]
Back pressure bar
[psi]
250
[3626]
250
[3626]
250
[3626]
230
[3336]
210
[3046]
180
[2610]
160
[2320]
Max speed min-1 (rpm) 3500 3500 3500 3500 3200 3200 3200
Min speed min-1 (rpm) 700 700 700 500 500 500 500
Weight kg
[lb]
3.2
[7.05]
3.75
[8.26]
3.9
[8.60]
4.05
[8.93]
4.15
[9.15]
4.3
[9.48]
4.4
[9.70]
Moment of inertia of
rotating components
x 10-6 kg•m2
[x 10-6 lb•ft2]
32.4
[769]
38.4
[911]
47.3
[1122]
53.3
[1265]
59.2
[1405]
68.1
[1616]
74.1
[1758]

1kg•m2 = 23.68 lb•ft2

Aluminum fan drive motor Gr 2
Aluminum fan drive motor Gr 3
  • An integrated dust cover to extend product life by preventing dirt ingression across the shaft seal
  • An enhanced gear teeth machining and special coating to reduce noise levels to boost operator comfort
  • EH proportional valve integrated in the rear casting to provide more uniform performance over the entire operating temperature range
  • PLUS+1® Compliant technology to ensure all electro-hydraulic products integrate seamlessly in a customized control system

Frame size   022 026 033 038 044
Displacement cm3/rev
[in3/rev]
22.1
[1.34]
26.2
[1.60]
33.1
[2.02]
37.9
[2.31]
44.1
[2.69]
Peak pressure bar
[psi]
270
[3916]
270
[3916]
270
[3916]
270
[3916]
270
[3916]
Rated pressure bar
[psi]
250
[3626]
250
[3626]
250
[3626]
250
[3626]
250
[3626]
Back pressure bar
[psi]
250
[3626]
250
[3626]
250
[3626]
250
[3626]
250
[3626]
Min speed min-1 (rpm) 2500 2500 2500 2500 2300
Max speed min-1 (rpm) 800 800 800 800 800
Weight kg
[lb]
8.62
[19.0]
8.72
[19.23]
8.82
[19.45]
8.88
[19.58]
9.02
[19.89]
Moment of inertia of
rotating components
x 10-6 kg•m2
[x 10-6 lb•ft2]
198
[4699]
216
[5126]
246
[5838]
267.2
[6341]
294.2
[6981]

1kg•m2 = 23.68 lb•ft2

Aluminum fan drive motor Gr 3

Documents

Type Name Language Valid for Updated Download File type
Data sheet Fan Drive Motor Ultra Compact Reversing Proportional Motor English Multiple 29 Sep, 2019 425.9 KB .pdf
User guide Group 2 Group 3 Fan Drive Gear Motors Technical Information English Multiple 25 Sep, 2019 8.7 MB .pdf

Related products

  • Cast iron gear motors including fan drives from Danfoss
    Cast iron gear motors including fan drives

    Specifically designed for demanding mobile equipment applications where maximum performance is required at peak power levels and operating temperatures, our cast iron gear motors including fan drives ensure great productivity and excellent fuel efficiency, along with reduced vehicle emissions.

  • Aluminum gear pumps from Danfoss
    Aluminum gear pumps

    Our gear pumps are robust and reliable. They are the ideal choice for a wide range of applications - from small to medium and large off-highway vehicles, as well as for industrial applications.

  • Cast iron gear pumps from Danfoss
    Cast iron gear pumps

    Our cast iron gear pumps are 20% smaller than conventional gear products, and give great power density in a small package.

Related applications

  • Construction
    Construction

    Space is limited on construction sites, and there are people working everywhere. Contractors need machines that can safely maneuver in a tight spot. At the same time they still need to be powerful enough to get the job done. At Danfoss, we deliver the components, software, and controls that enable your machines to run safely, efficiently and effectively.

  • Road building
    Road building

    Advanced hydraulic systems from Danfoss deliver the machine performance that ensures road builders can meet their deadlines.

  • Heavy machinery
    Heavy machinery

    Think about the heaviest challenges in the open mining, road building and construction industry. Tasks such as cutting through rock or the Arctic permafrost; compacting thick layers of hot asphalt. As well as lifting huge, prefabricated wall panels into place.

  • Crane and material handling
    Crane and material handling

    Cranes and other large handling machines are required to operate within very specific load ranges. Danfoss provides pressure transmitters that supply load limiting systems with crucial data, safeguarding your equipment, your load, and your operator.

  • Hydraulic solutions for forestry machines
    Forestry

    Rough, sloping terrain and cramped working conditions call for robust and reliable forestry machines. We make sure you can manage everything from cutting trees and transport to preparing the forest floor for replanting. We have the smart hydraulic solutions your machines need for precise and efficient forestry operations.

  • Lawn and turf
    Lawn and turf

    Lawn and turf machines must adapt to their surroundings and the season – becoming sweepers or snow blowers as required. At Danfoss, we make hydraulic solutions to provide that flexibility and ensure safe and efficient operation.

Related solutions

  • Thermal management
    Thermal management

    Danfoss is here to help. With our complete fan drive solution, Danfoss is able to help you maximize available engine power. As well as, decrease fuel costs and increase operator productivity.

  • Fan drives
    Fan drives

    Optimize fan drive solutions with the Reverse Displacement Motor (RDM) and the new Series 45 Fan Drive Control (FDC). The RDM is a breakthrough in technological innovation and engineering.