3340_0 42STH38 NEMA-17 Bipolar Precision Gearless Stepper
This NEMA-17 motor generates 3.6 Kg-cm of holding torque at 1.7 Amps. It comes with the rear shaft exposed, so you can mount an encoder or shaft coupler.
This NEMA-17 motor generates 3.6 Kg-cm of holding torque at 1.7 Amps. It comes with the rear shaft exposed, so you can mount an encoder or shaft coupler.
This motor is particulary suited for precision applications due to its 0.9° step angle.
When connected to a 1067 - PhidgetStepper Bipolar HC, the 3340 has a maximum speed of 2344 RPM.
The 3340 stepper motor connects to a bipolar motor controller such as the 1067 - PhidgetStepper Bipolar HC.
The following table shows how to connect the motor wires to the board connectors to produce a clockwise rotation in the stepper motor when increasing position. To wire for counter-clockwise rotation when increasing position, reverse the red and blue wires.
| Wire Color | Black | Green | Red | Blue |
| Board Connector | A | B | C | D |
Note: Make sure to unplug the power cord from the motor controller before switching wires around.
The rear shaft of this motor can be equipped with the HKT22 Optical Encoder for applications where you need to keep track of the exact position, velocity, or acceleration of the motor.
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Motor Properties
| Motor Type | Bipolar Stepper |
| Manufacturer Part Number | 42STH38-1684MB-12 |
| Step Angle | 0.9° |
| Step Accuracy | ± 5 % |
| Holding Torque | 3.6 kg·cm |
| Rated Torque | 3.3 kg·cm |
| Maximum Motor Speed | 400 RPM |
Electrical Properties
| Recommended Voltage | 12 V DC |
| Rated Current | 1.7 A |
| Coil Resistance | 1.7 Ω |
| Phase Inductance | 4.1 mH |
Physical Properties
| Shaft Diameter | 5 mm |
| Rear Shaft Diameter | 3.9 mm |
| Mounting Plate Size | NEMA - 17 |
| Weight | 288 g |
| Number of Leads | 4 |
| Wire Length | 300 mm |
