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.

Specifications

SM Series Specifications

Motor Model	SM35	SM60-VT1	SM60-VT2	SM100-VT1	SM100-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)

Maximum recommended motor voltage describes voltage seen by the motor coils

Motor Model	SM280-VT1	SM280-VT2	SM465-VT1	SM465-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)

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 Model	Add-Ons	Bus Voltage Selection
SM35 SM60 SM100 SM280 SM465	-CN1 -BK -E1 -E2 -D	-VT1 -VT2

Stepper Motors: Permanent Magnet, SM Series

Option	Description
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)

Option	Description
-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

Viscous Damper option only available on NEMA 17 and NEMA 23 SM motors.

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

Option	Description
-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.

Option	Description
-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.