DC Motor – Model 250
The 250 motor is a permanent magnet gearmotor utilizing a cylindrical barium ferrite 2 pole field magnet. Carbon brushes provide long life, quiet operation and low starting voltage. The rotor is supported by permanently lubricated sintered bronze bearings. The 250 motor is available in a wide range of speeds and is an excellent choice for applications requiring reliability and quiet operation at low cost.
DC Gear Motor – Model 250 Features
- Highest torque pear-shaped DC motor
- Rugged die cast gear housing
- Output shaft may extend from front, rear, or both ends and is supported by bronze sleeve bearings
- Mounting is compatible with other pear-shaped motors
- Integral RFI filtering can be furnished
- Standard models totally enclosed for protection against contaminants
- DC drive may be customized to suit special requirements
- Options available…consult factory
Specifications
Rated Torque
Curves below typify rated torque outputs for standard 12 and 24 volt motors. Values may vary ±15% and are to be used only as a guide to determine available performance.
Voltage
| Rated Voltage | Operating Voltage |
|---|---|
| 12 VDC | 9-18 volts |
| 24 VDC | 19-30 volts |
Current Draw
| Voltage | Rated Load | No Load |
|---|---|---|
| 12 VDC | 470mA | 80mA |
| 24 VDC | 240mA | 50mA |
Current draw may be higher in certain units depending on the type and amount of lubrication used in the gear trains.
Ambient Operating Temp. Range
-20°C to +60°C
Lubrication
Permanently lubricated. Special lubricants available for operation under -20°C…consult factory (-40°C min.)
Direction of Rotation
DC Motors may be operated in either direction depending on polarity as applied to the terminals. Direction of rotation of the output shaft with respect to polarity markings of the terminals will depend upon the number of gear reductions used in the gear train. Instantaneous reversing is not recommended in order to provide maximum brush life. Bi-directional DC Motors available.
Output Shaft Options Available
Dielectric and Insulation Resistance
Dielectric: 1000 volts RMS for one minute between terminals and case.
Insulation Resistance: 10 megohm minimum measured with 500 VDC applied.
R.F.I.
The 200 motor is available with an integrally assembled radio frequency filter to suppress RF noise and enhance brush life.