SM Series Stepper Motors
Description
Design Features
- Industry-standard NEMA 23, 34, and 42 frame sizes for ease of installation
- Torque of 0.27 to 7.42 N·m (38 to 1050 oz·in) covers virtually any application requirement
- Standard 200 full step (1.8 degree/step) design is ideal for microstepping to 50,000 steps/revolution
- High quality materials used throughout, including stainless-steel shaft and double shielded ball bearings
- Excellent non-cumulative step accuracy of +/- 3%
Aerotech offers six standard models of hybrid, permanent magnet stepper motors. Covering the torque range of 0.27 to 7.42 N·m (38 to 1050 oz·in), these motors are well-suited for virtually all applications that employ stepping and/or microstepping drives.
Aerotech's stepper motors meet NEMA frame size standards for flange-mounted size 23, size 34, and size 42 motors. High quality materials and construction ensure a long service life, even in harsh environments.
Standard Models
Standard models have flying leads (enclosed terminals on the 1010SM), rear shaft extensions, and load-end shaft flats for secure load coupling. The motors have a standard black textured finish.
Optional rear housings are available that provide either a bulkhead connector or integral cable termination. Rear housing models include versions with a high-accuracy home marker encoder, standard optical encoder, and manual adjustment knob.
Home Marker Models
An optional home marker encoder can be added to the standard models. The home marker provides an inexpensive means of establishing a highly accurate (0.1 micron in most Aerotech positioning systems) home reference.
The home marker encoder is protected in a rugged rear motor housing that also provides either a connector ("B" versions) or integral cable/connector ("C" versions) termination of the encoder’s leads, as well as the motor and limit switch leads.
Optical Encoder Models
An optical encoder with 500 or 1000 ppr is available for the SM series. The three-channel (A, B, marker), amplified-sine or line-driver encoder is housed in a rugged rear motor housing. All leads, including the motor and limit switch leads, are terminated in a connector ("B" versions) or integral cable/connector ("C" versions).
Specifications
SM Series Specifications
| Motor Model | Units | 50SM | 55SM | 101SM | 140SM |
|---|---|---|---|---|---|
| NEMA Motor Frame Size | 23 | ||||
| Stall Torque | N·m (oz·in) | 0.3 (38) | 0.4 (55) | 0.6 (90) | 1.0 (140) |
| Rated Phase Current | A | 1 | 0.8 | 5 | 1.4 |
| Recommended Driver Bus Voltage | V | 40 | 160 | 40 | 160 |
| Rotor Inertia | kg·m2 (oz·in·s2) |
12 x 10-6 (1.66 x 10-3) |
10 x 10-6 (1.42 x 10-3) |
35 x 10-6 (5 x 10-3) |
|
| Full Step Angle | degrees | 1.8 | |||
| Accuracy | degrees | ±0.054 (Non-Cumulative) | |||
| Maximum Radial Load | N (lb) | 67 (15) | |||
| Maximum Thrust Load | N (lb) | 111 (25) | |||
| Weight | kg (lb) | 0.6 (1.4) | 0.7 (1.5) | 1.3 (2.8) | 1.4 (3.1) |
SM Series Specifications continued
| Motor Model | Units | 310SM | 1010SM |
|---|---|---|---|
| NEMA Motor Frame Size | 34 | 42 | |
| Stall Torque | N·m (oz·in) | 2.6 (370) | 7.4 (1050) |
| Rated Phase Current | A | 6 | 8.6 |
| Recommended Driver Bus Voltage | V | 80 | 160 |
| Rotor Inertia | kg·m2 (oz·in·s2) |
187 x 10-6 (27 x 10-3) |
805 x 10-6 (114 x 10-3) |
| Full Step Angle | degrees | 1.8 | |
| Accuracy | degrees | ±0.054 (non-cumulative) | |
| Maximum Radial Load | N (lb) | 156 (35) | 178 (40) |
| Maximum Thrust Load | N (lb) | 267 (60) | 556 (125) |
| Weight | kg (lb) | 3.5 (7.8) | 9.1 (20) |
Dimensions
-
NEMA 23, NEMA 34, NEMA 42 Frame Sizes 
Ordering Information
Ordering Example
| Stepping Motor Model | Rear Housing | Marker/Encoder/Knob |
|---|---|---|
| 50SM | B2 | E500AS |
Ordering Options
| Stepping Motor Model | Rear Housing | Marker/Encoder/Knob |
|---|---|---|
| 50SM 55SM 101SM 140SM 310SM 1010SM |
B2 B3 B4 C2 C3 C4 C2N C2EN C3N C3EN |
HM HMK ExxxxA ExxxxLD |
Stepper Motors: Permanent Magnet, SM Series
| Options | Description |
|---|---|
| 50SM | NEMA 23 - 0.3 N·m (38 oz·in) 1.8 degree stepping motor |
| 55SM | NEMA 23 - 0.4 N·m (55 oz·in) 1.8 degree stepping motor |
| 101SM | NEMA 23 - 0.6 N·m (90 oz·in) 1.8 degree stepping motor |
| 140SM | NEMA 23 - 1.0 N·m (140 oz·in) 1.8 degree stepping motor |
| 310SM | NEMA 34 - 2.6 N·m (370 oz·in) 1.8 degree stepping motor |
| 1010SM | NEMA 42 - 7.4 N·m (1050 oz·in) 1.8 degree stepping motor |
Rear Housing Options
| Options | Description |
|---|---|
| B2 | Rear housing, connector for NEMA 23 motor, with limit switch wiring |
| C2 | Rear housing, integral cable/connector for NEMA 23 motor, no limit switch wiring |
| C2N | Rear housing, integral cable/connector for NEMA 23 motor, with limit switch wiring |
| C2EN | Rear housing, integral end-exit cable/connector for NEMA 23 motor, with limit switch wiring |
| B3 | Rear housing, connector for NEMA 34 motor (Requires HM), with limit switch wiring |
| B3E | Rear housing, end-exit connector for NEMA 34 motor, with limit switch wiring (Requires HM) |
| C3 | Rear housing, integral cable/connector for NEMA 34 motor (Requires HM) |
| C3N | Rear housing, integral cable/connector for NEMA 34 motor, with limit switch wiring |
| C3EN | Rear housing, integral end-exit cable/connector for NEMA 34 motor, with limit switch wiring |
| B4 | Rear housing, connector for NEMA 42 motor, with limit switch wiring (Requires HM) |
| -K | Adjust knob for NEMA 23 stepper motors |
| -K | NEMA 34, 42 Adjust knob for NEMA 34, 42 stepper motors |
| -HM | Home marker encoder |
| -HMK | Home marker encoder and manual adjust knob (NEMA 23 motor only) |
| -ExxxxAS * | Rotary encoder with amplified sine output |
| -ExxxxLD * | Rotary encoder with line driver output |
- * Marker/encoder/knob options not available on C4 and P
- ** Specify encoder resolution ("xxxx") in steps per rev when ordering
Mating Connectors
| Options | Description |
|---|---|
| MCB2B3 | Mate for B2 and B3 stepper cans |
| MCMS | Mate for MS connector on B4 stepper can (MS3102A-24) |
| MCKU10 | Two connector mates for the two connectors on the C2 and C3 integral cables |