The 3257N9C2B series features 32mm diameter coreless DC motors with graphite brushes, available in both 12V and 24V configurations. These motors deliver high efficiency and smooth operation, making them ideal for demanding applications in medical equipment, robotics, and industrial automation. Options include custom shaft lengths, special coils, varied bearing types, and gear heads to tailor performance to specific requirements.
| Parameter | Unit | 3257N9C2B01-54-12.0 | 3257N9C2B02-64-24.0 | 3257N9C2B08-74-24.0 |
|---|---|---|---|---|
| Voltage | V | 12.0 | 24.0 | 24.0 |
| Terminal resistance | Ω | 1 | 2.8 | 2.4 |
| No-load speed | rpm | 5600 | 6400 | 7400 |
| No-load current | mA | 240 | 70 | 100 |
| Stall torque | mNm | 235.8 | 301.9 | 303.5 |
| Stall current | mA | 12000 | 8570 | 10000 |
| Nominal torque | mNm | 30 | 50 | 50 |
| Nominal speed | rpm | 4890 | 5340 | 6180 |
| Nominal current | mA | 1740 | 1480 | 1730 |
| Max. output power | W | 34.6 | 50.6 | 77 |
| Max. efficiency | % | 74 | 83 | 81 |
| Back-EMF constant | mV/rpm | 2.2 | 3.7 | 3.2 |
| Torque constant | mNm/A | 20.9 | 35.5 | 30.7 |
| Speed/torque gradient | rpm/mNm | 9.6 | 17.5 | 18.6 |
| Rotor inertia | g·cm² | 42 | 42 | 42 |
| Weight | g | 230 | 230 | 230 |
| Thermal resistance housing-ambient | K/W | 7.6 | 7.6 | 7.6 |
| Thermal resistance winding-housing | K/W | 4.1 | 4.1 | 4.1 |
| Thermal time constant motor | s | 725 | 725 | 725 |
| Thermal time constant winding | s | 540 | 540 | 540 |
| Operating temperature range | °C | -20~+120 | -20~+120 | -20~+120 |
| Thermal class of winding | °C | 155 | 155 | 155 |
| Axial play | mm | 0.02~0.15 | 0.02~0.15 | 0.02~0.15 |
| Radial play | mm | 0.025 | 0.025 | 0.025 |
| Axial load dynamic | N | 5 | 5 | 5.6 |
| Axial load static | N | 50 | 50 | 110 |
| Radial load at 3 mm from mounting face | N | 30 | 30 | 30 |
| No. of pole pairs | 1 | 1 | 1 | |
| Bearings | 2 sleeve bearings | 2 sleeve bearings | 2 ball bearings | |
| Commutator | graphite 9 segments | graphite 9 segments | graphite 9 segments | |
| Protection class | IP | 40 | 40 | 40 |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | 3257N9C2B01-54-12.0 |
|---|---|---|
| Voltage | V | 12.0 |
| Terminal resistance | Ω | 1 |
| No-load speed | rpm | 5600 |
| No-load current | mA | 240 |
| Stall torque | mNm | 235.8 |
| Stall current | mA | 12000 |
| Nominal torque | mNm | 30 |
| Nominal speed | rpm | 4890 |
| Nominal current | mA | 1740 |
| Max. output power | W | 34.6 |
| Max. efficiency | % | 74 |
| Back-EMF constant | mV/rpm | 2.2 |
| Torque constant | mNm/A | 20.9 |
| Speed/torque gradient | rpm/mNm | 9.6 |
| Rotor inertia | g·cm² | 42 |
| Weight | g | 230 |
| Thermal resistance housing-ambient | K/W | 7.6 |
| Thermal resistance winding-housing | K/W | 4.1 |
| Thermal time constant motor | s | 725 |
| Thermal time constant winding | s | 540 |
| Operating temperature range | °C | -20~+120 |
| Thermal class of winding | °C | 155 |
| Axial play | mm | 0.02~0.15 |
| Radial play | mm | 0.025 |
| Axial load dynamic | N | 5 |
| Axial load static | N | 50 |
| Radial load at 3 mm from mounting face | N | 30 |
| No. of pole pairs | 1 | |
| Bearings | 2 sleeve bearings | |
| Commutator | graphite 9 segments | |
| Protection class | IP | 40 |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | 3257N9C2B02-64-24.0 |
|---|---|---|
| Voltage | V | 24.0 |
| Terminal resistance | Ω | 2.8 |
| No-load speed | rpm | 6400 |
| No-load current | mA | 70 |
| Stall torque | mNm | 301.9 |
| Stall current | mA | 8570 |
| Nominal torque | mNm | 50 |
| Nominal speed | rpm | 5340 |
| Nominal current | mA | 1480 |
| Max. output power | W | 50.6 |
| Max. efficiency | % | 83 |
| Back-EMF constant | mV/rpm | 3.7 |
| Torque constant | mNm/A | 35.5 |
| Speed/torque gradient | rpm/mNm | 17.5 |
| Rotor inertia | g·cm² | 42 |
| Weight | g | 230 |
| Thermal resistance housing-ambient | K/W | 7.6 |
| Thermal resistance winding-housing | K/W | 4.1 |
| Thermal time constant motor | s | 725 |
| Thermal time constant winding | s | 540 |
| Operating temperature range | °C | -20~+120 |
| Thermal class of winding | °C | 155 |
| Axial play | mm | 0.02~0.15 |
| Radial play | mm | 0.025 |
| Axial load dynamic | N | 5 |
| Axial load static | N | 50 |
| Radial load at 3 mm from mounting face | N | 30 |
| No. of pole pairs | 1 | |
| Bearings | 2 sleeve bearings | |
| Commutator | graphite 9 segments | |
| Protection class | IP | 40 |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | 3257N9C2B08-74-24.0 |
|---|---|---|
| Voltage | V | 24.0 |
| Terminal resistance | Ω | 2.4 |
| No-load speed | rpm | 7400 |
| No-load current | mA | 100 |
| Stall torque | mNm | 303.5 |
| Stall current | mA | 10000 |
| Nominal torque | mNm | 50 |
| Nominal speed | rpm | 6180 |
| Nominal current | mA | 1730 |
| Max. output power | W | 77 |
| Max. efficiency | % | 81 |
| Back-EMF constant | mV/rpm | 3.2 |
| Torque constant | mNm/A | 30.7 |
| Speed/torque gradient | rpm/mNm | 18.6 |
| Rotor inertia | g·cm² | 42 |
| Weight | g | 230 |
| Thermal resistance housing-ambient | K/W | 7.6 |
| Thermal resistance winding-housing | K/W | 4.1 |
| Thermal time constant motor | s | 725 |
| Thermal time constant winding | s | 540 |
| Operating temperature range | °C | -20~+120 |
| Thermal class of winding | °C | 155 |
| Axial play | mm | 0.02~0.15 |
| Radial play | mm | 0.025 |
| Axial load dynamic | N | 5.6 |
| Axial load static | N | 110 |
| Radial load at 3 mm from mounting face | N | 30 |
| No. of pole pairs | 1 | |
| Bearings | 2 ball bearings | |
| Commutator | graphite 9 segments | |
| Protection class | IP | 40 |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
