
NEMA 16 Bipolar 0.9deg 0.09Nm (12.5oz.in) 0.4A 6.6V 39x39x20mm 4 Wires Stepper Motor
Manufacturer Part Number: 39H020HM-0404
Frame Size: 39x39mm
Motor Type: Bipolar Stepper
Step Angle: 0.9 deg
Holding Torque: 0.09Nm(12.5oz.in)
Rated Current/phase: 0.4A
Voltage: 6.6V
Phase Resistance: 16.5ohms
Inductance: 23.5mH ± 20%(1KHz)
Body Length: 20mm
- Fast Delievery
- Quality Assurance
Customization Available
Product Introduction
Technical Parameter
|
Item |
Specifications |
|
Step Angle Accuracy |
±5% |
|
Resistance Accuracy |
±10% |
|
Inductance Accuracy |
±20% |
|
Temperature Rise |
80K Max. |
|
Ambient Temperature |
-20℃~+50℃ |
|
Insulation Resistance |
100MΩMin.@ 500VDC |
|
Dielectric strength |
One minute@500VAC∙5mA Max. |
|
Shaft Radial Play |
0.06Max.@450g |
|
Shaft Axial Play |
0.08Max.@450g |
Technical Specification
|
Model No. |
Polar |
Rated |
Current/ |
Resistance/ |
Inductance/ |
Holding |
# of |
Rotor |
Weight |
Length |
|
|
V |
A |
Ω |
mH |
oz-in |
kgf · cm |
g∙ cm2 |
kg |
mm |
|||
|
39H020HM-0404 |
Bipolar |
6.6 |
0.4 |
16.5 |
23.5 |
12.5 |
0.9 |
4 |
11 |
0.12 |
20 |

Pull Out Torque Curve

FAQ
Q: Can stepper motors be used in low-noise applications?
A: Stepper motors are generally not considered the best choice for low-noise applications. Stepper motors operate by moving in discrete steps, and each step can produce vibrations and audible noise. This is especially noticeable at higher speeds or when the motor is under heavy load. If low noise is a critical requirement for your application, you may want to consider alternative motor types such as brushless DC (BLDC) motors or servo motors. These motor types can provide smoother and quieter operation compared to stepper motors. However, it's important to evaluate your specific application requirements and consider factors like torque, speed, and cost before selecting the appropriate motor type.
Q: Can I change the step resolution of a stepper motor?
A: The step resolution of a stepper motor is typically fixed based on its design and the control signals applied. However, micro-stepping techniques can be used to achieve finer step resolutions between the full-step positions.
Q: What is a stepper motor?
A: A stepper motor is an electromechanical device that converts electrical pulses into precise mechanical movements. It is a brushless, synchronous motor that operates in discrete steps or increments. Unlike traditional motors that continuously rotate, a stepper motor moves in discrete angular increments, commonly referred to as steps. Each step corresponds to a fixed angle of rotation, typically ranging from 0.9 to 1.8 degrees, although smaller step sizes are achievable with micro-stepping.
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