Individual Motor Specifications

Model Number VS-U21 VS-U22 VS-U23
Drawing Number list list list
Environment VS VS VS
Motor U21 U22 U23
Pricing VS-U21 VS-U22 VS-U23
NEMA Frame Size 23 23 23
Number of Magnetic Stacks 1 2 3
Step Angle 1.8 1.8 1.8
Accuracy Grade (%) 3 3 3
Detent Torque (oz-in) 6 15 21
Static Torque At Thermal Current {unipolar} (oz-in) 45 80 120
Static Torque At Thermal Current {parallel} (oz-in) 50 85 110
Static Torque At Thermal Current {series} (oz-in) 60 110 130
Thermal Current {unipolar} (A) 1.4 1.6 2.0
Thermal Current {parallel} (A) 1.6 1.8 2.3
Thermal Current {series} (A) 1.0 1.4 1.8
Single Coil Inductance (mH) 3.5 3.5 3.5
Single Coil Resistance (ohm) 1.4 1.4 1.4
Series Inductance (mH) 14 14 14
Series Resistance (ohm) 3.2 3.2 3.2
Bearing Type C/F C/F C/F
Bearing Thrust Load (lbs) 25 25 25
Bearing Radial Load (lbs) 50 50 50
Bearing End Play (10-3 in) C/F C/F C/F
Bearing Radial Play (10-3 in) 8 8 8
Rotor Inertia (oz-in2) 0.48 1.28 1.75
Body Diameter (in) 2.3 2.3 2.3
Body Length (in) 2 3.1 4
Weight (lbs) 1.6 2.4 3.2
Vacuum Rated Stepper Motor
VS Size 23 Standard Grade Vacuum Rated Stepper Motor

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Speed/Torque (oz-in) Charts

CAD Drawings

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