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Permanent Magnet AC Synchronous Motor Family
Series RA Direct Drive Synchronous
Permanent Magnet Synchronous RA Direct Drive Specifications:
Output Speed: 300 RPM
Lead Wire: 4 leads 22AWG (approx. 12 inches [304.8 mm])
Operation Ambient Temp: -10°C to +40°C (approx.)
Shaft Bearing: Sleeve or Ball Bearing Available
Recognition: E53578(N), Component-Impedance Protected Motors,
115Vac 60 Hz Standard Rotor
Certification: Card No. 42576, Motors and Generators,
115 Vac, 60 Hz, 11 watts max.
Capacitor is required for operation.
Note:  Typical data subject to change without notification
Additional Information:

The rugged RA series is the largest direct drive motor of the HURST® permanent magnet synchronous line with dynamic torque ratings of 15 ounce-inches [105.9 mN-m] (standard) and 20 ounce-inches [141.2 mN-m] Hi-Torque. At 60Hz rotor speed is 300 RPM. Motors are available with a single or double ended shaft. Sleeve and ball bearings are available.

RA motors are designed to assure reliable starting in the desired direction and to eliminate unwanted reversal of rotation under load. Motors listed are 115 VAC at 60 Hz and require a capacitor.

RA Direct Drive Drawings:
RA Direct Drive Diagrams:
RA Direct Drive Model Table:
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Model Part
Number
Rated
Torque
(oz-in)
Rated
Torque
(mN-m)
Output
Speed
(RPM)
60Hz
Input
Power
(watts)
Voltage
(Vac)
60Hz
Full
Load
Temp
Rise
(degC)
Capacitor
Value
(mfd)
Weight
(oz)
Weight
(grams)
RA 3901-001 15 105.9 300 11 115 37 1 26 737.1
RA 3905-0012 20 141.2 300 14.5 115 46 1.3 26 737.1
RA 3911-0011 15 105.9 300 11 115 37 1 26 737.1
RA 3915-0011, 2 20 141.2 300 14.5 115 46 1.3 26 737.1














Notes:
1 Shaft Bearing:  Ball Bearing.
2 Hi-Torque Rotor Construction.