SM Series High-Performance Stepper Motors


Design Features

  • Industry-standard NEMA frame stepper motors
  • Available encoder feedback and brake options
  • Models to run off of North American & Asian/European line voltages
  • Optimized performance for use with Aerotech stages
  • High-performance micro-stepping up to 50,000 steps/revolution
  • Vacuum and cleanroom versions available

The SM series of stepper motors brings efficiency of motion to Aerotech’s line of rotary motor products. With ample torque at high velocities, the SM series is a perfect stand-in for DC brushed or brushless rotary motors in nearly any medium-accuracy motion application. With multiple offerings in frame sizes from NEMA 17 to NEMA 34, the SM series provides additional options to meet our customers’ needs.

Design and Integration Flexibility

The SM series motors have been designed with optional direct encoder feedback, a holding brake, or even a viscous damper to improve the dynamic response of the rotor. These standard options allow the SM series to adapt to many common motion applications and extend their capabilities for use in a wider array of processes than a general stepper motor.

Line Voltage Capable

The NEMA 23 and NEMA 34 frame size SM series motors are available in a high-voltage optimized design. This produces optimum performance at both North American and European/Asian line voltages without the need for a transformer, further streamlining the system solution.


SM Series Specifications

Motor ModelSM35SM60-VT1SM60-VT2SM100-VT1SM100-VT2
NEMA Motor Frame Size  NEMA 17 NEMA 23
Stall Torque

0.78 N·m (111 oz·in)

1.23 N·m (175 oz·in) 1.41 N·m (200 oz·in) 1.85 N·m (262 oz·in) 2.50 N·m (354 oz·in)
Rated Amps Per Phase 3.0 A 2.8 A 0.84 A 3.5 A 0.99 A
Maximum Recommended Motor Voltage (1) 35 V 35 V 160 V 35 V 160 V
Rotor Inertia 1.02E-05 kg·m2 (0.0014 oz·in·s2 ) 3.00E-05 kg·m2 (0.0042 oz·in·s2 ) 4.80E-05 kg·m2 (0.0068 oz·in·s2 ) 5.21E-05 kg·m2 (0.0074 oz·in·s2)
Full Step Angle 1.8°
Accuracy ±0.09°
Maximum Radial Load 2.9 kg (6.3 lb) 7.7 kg (17 lb)
Maximum Thrust Load 1.0 kg (2.2 lb) 1.5 kg (3.4 lb)
Weight 0.50 kg (1.1 lb) 0.70 kg (1.6 lb) 1.0 kg (2.2 lb) 1.2 kg (2.6 lb)
  1. Maximum recommended motor voltage describes voltage seen by the motor coils
Motor ModelSM280-VT1SM280-VT2SM465-VT1SM465-VT2
NEMA Motor Frame Size NEMA 34
Stall Torque

4.50 N·m (637 oz·in)

8.75 N·m (1238 oz·in) 12.0 N·m (1700 oz·in) 11.5 N·m (1637 oz·in)
Rated Amps Per Phase 7.1 A 3.04 A 7.1 A 2.94 A
Maximum Recommended Motor Voltage (1) 48 V 160 V 48 V 160 V
Rotor Inertia 1.41E-04 kg·m2 (0.020 oz·in·s2) 2.70E-04 kg·m2 (0.038 oz·in·s2) 4.02E-04 kg·m2 (0.057 oz·in·s2)
Full Step Angle 1.8°
Accuracy ±0.09°
Maximum Radial Load 22.5 kg (50 lb)
Maximum Thrust Load 6.1 kg (14 lb)
Weight 2.3 kg (5.1 lb) 3.8 kg (8.4 lb) 5.4 kg (12 lb) 5.3 kg (11.7 lb)
  1. Maximum recommended motor voltage describes voltage seen by the motor coils
  • SM35 Torque
  • SM60 Torque
  • SM100 Torque
  • SM280 Torque
  • SM465 Torque


Ordering Information

Ordering Example

SM465 -BK -VT1

Ordering Options

Stepper Motor ModelAdd-OnsBus Voltage Selection

Stepper Motors: Permanent Magnet, SM Series

SM35 NEMA 17 stepper motor
SM60 NEMA 23 stepper motor
SM100 NEMA 23 stepper motor, high torque
SM280 NEMA 34 stepper motor
SM465 NEMA 34 stepper motor, high torque

Add-Ons (Optional)

-CN1 Standard connectorized motor
-BK Holding brake
-E1 1000-line incremental square-wave encoder with marker (RS-422 line-drive output)
-E2 1000-line incremental 1 Vpp amplified sine-wave encoder with marker
-D(1) Viscous damper
  1. Viscous Damper option only available on NEMA 17 and NEMA 23 SM motors.

Bus Voltage Selection (Optional for NEMA 23 & NEMA 34 Motors Only)

-VT1 Low voltage model
-VT2 High voltage model

Integration (Required)

Aerotech offers both standard and custom integration services to help you get your system fully operational as quickly as possible. The following standard integration options are available for this system. Please consult Aerotech if you are unsure what level of integration is required, or if you desire custom integration support with your system.

-TAS Integration - Test as system
Testing, integration, and documentation of a group of components as a complete system that will be used together (ex: drive, controller, and stage). This includes parameter file generation, system tuning, and documentation of the system configuration.
-TAC Integration - Test as components
Testing and integration of individual items as discrete components that ship together. This is typically used for spare parts, replacement parts, or items that will not be used together. These components may or may not be part of a larger system.