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73 mm (RA) Direct Drive Synchronous Motor0 pages
SYNCHRONOUS MOTOR FAMILY
Series 73mm (RA) Direct Drive Synchronous Motor
Output Speed:
Lead Wire:
Operation Ambient Temp:
Shaft Bearing:
300 RPM
4 leads 22AWG (approx. 12 inches [304.8 mm])
-10°C to +40°C (approx.)
Sleeve or Ball Bearing Available
E53578(N), Component-Impedance Protected
Motors,
Recognition:
115Vac 60 Hz Standard Rotor
Card No. 42576, Motors and Generators,
Certification:
115 Vac, 60 Hz, 11 watts max.
Capacitor is required for operation.
Note: Typical data subject to change without notification
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.
Output Rated Rated Input Capacitor
Part
Speed Torque Torque Power
Value
Model
Number
(RPM) (oz-in) (mN-m) (watts)
(mfd)
Full Load
Temp.
Rise
(oC)
Weight
(oz)
Weight Shaft
(g)
Bearing
RA
3901-001
300
15
105.9
11
1.0
37
26
737.1
SLEEVE
RA
3905-001
300
20
141.2
14.5
1.3
46
26
737.1
SLEEVE
RA
3911-001
300
15
105.9
11
1.0
37
26
737.1
BALL
RA
3915-001
300
20
141.2
14.5
1.3
46
26
737.1
BALL
Bold face listings indicate Hi-Torque rotor.
1
Hurst 1551 East Broadway Street Princeton, IN 47670
MOTOR SPECIFICATION SHEET
