Drive Selection: Solution Details
Drive System: 3890H036CR + 44/1 531:1
Results of the Load Calculation
Load current | 388,11 | mA |
Load voltage | 21,79 | V |
Motor winding temperature | 32,97 | °C |
Motor housing temperature | 32,74 | °C |
Required motor torque | 14,4 | mNm |
Required motor speed | 3.185,05 | 1/min |
Output power | 2,44 | W |
Efficiency (over all) | 28,89 | % |
Overall Dimensions
Diameter | 44 | mm |
Length | 198,6 | mm |
Mass | 1.390 | g |
Motor Characteristic Data
(3890H036CR)Nominal voltage | 36 | V |
Terminal resistance | 780 | mΩ |
Torque constant | 63,65 | mNm/A |
No load speed | 5.400 | 1/min |
Stall torque | 2,89 | Nm |
Speed constant | 150 | 1/min/V |
Rotor inductance | 0,24 | mH |
Slope of n-M curve | 1,8 | 1/min/mNm |
Rotor inertia | 171 | gcm² |
Mechanical time constant | 3,3 | ms |
RTH2 Reduction | 30 | % |
Efficiency max. | 87 | % |

Gearhead Characteristic Data
(44/1 531:1)Housing material | metal | |
Geartrain material | metal | |
Backlash at no load | 1 | ° |
Bearings on output shaft | ball bearings, preloaded | |
Shaft load, max. radial | 400 | N |
Shaft load, max. axial | 350 | N |
Shaft press fit force, max. | 500 | N |
Number of gear stages | 4 | |
Reduction ratio | 531 | :1 |
Calculated reduction | 530.8416 | :1 |
Continuous torque | 16 | Nm |
Mass | 840 | g |
Efficiency, max. | 65 | % |
Gearshaft diameter | 10 | mm |
Geahead diameter | 44 | mm |

Motor-, Gearhead- or Encoder preselection (optional)
Motor series | All |
Gear series | All |
Encoder series | Without encoder |
Global settings
Ambient temperature | 22 | °C |
Available diameter, max. | 100 | mm |
Available length, max. | 400 | mm |
Available supply voltage, max. | 75 | V |
Advanced settings
Available current, max. | 1 | A |
Efficiency, min. | 10 | % |
RTH2 Reduction | Default of motor. See info. | i |
Encoder: Steps per revolution, min. | 16 | i |

Your entries
Load transmission | Gear reduction | |
Required load speed | 1 | 1/min |
Required load torque | 21 | Nm |
Reduction ratioi0 | 6 | :1 |
Efficiency, max. | 90 | % |