Baldor-Reliance
Baldor-Reliance CDP3320 DC Motor 0.33 HP 56C Frame 90V 1750 RPM
A 0.33 HP DC motor with a 56C frame, 90 V supply and 1,750 RPM continuous duty
- TypeMotors
- 33 HP output suits fractional-load machinery
- 90 V DC supply simplifies low-voltage installations
- 1,750 RPM nameplate speed matches standard drive ratios
- 56C frame with keyed 5/8 in shaft fits common couplings
- Totally enclosed non-ventilated steel housing resists dust and moisture
What this motor is and who it fits
The Baldor-Reliance CDP3320 is a 0.33 HP DC motor built on a 56C frame for 90 V DC supply. It delivers 1,750 RPM at full load and draws 3.2 A. The totally enclosed non-ventilated steel body suits horizontal rigid-base mounting in industrial machinery.
Voltage and enclosure limits
Operation is fixed at 90 V DC; no other voltage is supported. The enclosure is totally enclosed non-ventilated, so cooling relies on ambient air up to 40 °C. Thermal protection is not fitted, and the service factor is 1.0, leaving no overload margin. Continuous duty is rated only within these boundaries.
Capacity and where headroom ends
The motor provides 0.33 HP at 1,750 RPM with a 5/8 in keyed shaft. It handles steady loads within the nameplate current of 3.2 A. Applications needing higher torque, variable speed without a separate controller, or operation above 40 °C ambient will exceed its design envelope.
Highlights
- 33 HP output suits fractional-load machinery
- 90 V DC supply simplifies low-voltage installations
- 1,750 RPM nameplate speed matches standard drive ratios
- 56C frame with keyed 5/8 in shaft fits common couplings
- Totally enclosed non-ventilated steel housing resists dust and moisture
Specifications
| Brand | BALDOR-RELIANCE |
|---|---|
| Type | Motors |
Questions about this item
Is the 0.33 HP rating the right size for a light-duty conveyor?
At 0.33 HP and 1750 RPM the motor suits light continuous loads; the 1.0 service factor means no overload margin, so size the drive for the exact torque required.
What does the 1750 RPM nameplate speed mean once the motor is coupled to a gearbox?
1750 RPM is the unloaded shaft speed at 90 V DC; under full 3.2 A load the speed will drop slightly, so calculate gearbox ratios from the loaded speed, not the nameplate figure.
How does the 90 V DC supply voltage limit the motor's performance?
The motor is wound for 90 V DC; applying a higher voltage will overspeed and overheat it, while a lower voltage reduces available torque proportionally.
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