RAS Direct Drive Permanent Magnet DC Stepper Motors

Discontinued Motor
for reference only

Permanent Magnet DC Stepper Motor Family
Series RAS, RBS Direct Drive Stepper
Permanent Magnet DC Stepper Motor RAS, RBS Direct Drive Specifications:
Step Angle: 7.5° & 15°
Position Accuracy: +/- 5% max.
Number of Phases: 4 phase bifilar
Insulation Class: Class A (105°C)
Lead Wire: 6 leads (approx. 12 inches [304.8 mm])
Operation Ambient Temp: -10°C to +40°C (approx.)
Shaft Bearing: Sleeve or Ball Bearing Available
Note:  Typical data subject to change without notification
Additional Information:

Designed specifically to combine greater torque and small size, the RAS and RBS stepping motors meet many industrial and instrument requirements. Standard 7.5° & 15° step angle motors have a torque rating at 4-5 p/s of 23 ounce-inches [162.4 mN-m]. The Hi-Torque model is rated at 29 ounce-inches [204.8 mN-m].

Dual sleeve bearings are standard, ball bearings may be specified. Double-ended shafts also are available.

Notes:
1. Standard RAS and RBS direct drive motors have 4-phase bifilar windings (6 lead wires) and unipolar operation.
RAS, RBS Direct Drive Drawings:
RAS, RBS Direct Drive Diagrams:
RAS, RBS Direct Drive Model Table:
Model Part Number Nom.
Voltage
(Vdc)		 Step
Angle
(deg)		 Steps
per
Rev		 Rated
Torque
@
4-5 p/s
(oz-in)		 Rated
Torque
@
4-5 p/s
(mN-m)		 Holding
Torque
(oz-in)
(2 Phase Energized)		 Holding
Torque
(mN-m)
(2 Phase Energized)		 Full
Load
Temp
Rise
(deg C)		 Input
Power
(watts)		 Winding
Res.
(ohms)		 Rotor
Inertia
(oz-in2)		 Rotor
Inertia
(gm-cm2)		 Weight
(oz)		 Weight
(g)
RAS 3906-0011 12 7.5 48 29 205 37 261 55 12 24 .92 168.3 26 737.1
RBS 3907-0021 12 15 24 17 120 27 190.7 60 12 24 .92 168.3 26 737.1
 
Notes:
1 Hi-Torque Rotor Construction.