NEMA 17 Bipolar 3.75deg 0.054Nm (7.5oz.in) 0.5A 6V 42x42x21mm 4 Wires Stepper Motor

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 Voltage	Current/ Phase	Resistance/ Phase	Inductance/ Phase	Holding Torque		# of Leads	Rotor inertia	Weight	Length
		V	A	Ω	mH	oz-in	kgf · cm		g∙ cm2	kg	mm
42H021HJ-0504	Bipolar	6	0.5	12	15	7.5	0.54	4	15	0.13	21

 

 

Pull Out Torque Curve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FAQ

Q: Are there any safety considerations when using stepper motors?

A: Yes, there are some safety considerations to keep in mind when using stepper motors. Here are a few important ones:

1. Electrical Safety: Stepper motors are powered by electricity, so it's crucial to follow proper electrical safety practices. Ensure that the motor is connected to a suitable power source and that all electrical connections are secure. Be cautious when handling live wires and avoid working on the motor while it is powered on.

 

2. Heat Dissipation: Stepper motors can generate heat during operation, especially when running at high speeds or with heavy loads. Adequate heat dissipation is essential to prevent overheating, which can damage the motor or surrounding components. Make sure the motor is mounted in a well-ventilated area or consider using heat sinks or cooling fans if necessary.

 

3. Mechanical Hazards: Stepper motors often have rotating shafts that can pose mechanical hazards if not handled properly. Avoid touching the rotating parts while the motor is in operation, as it can cause injury. If necessary, use appropriate safety guards or enclosures to prevent accidental contact with moving components.

 

4. Motor Overloading: Operating a stepper motor beyond its specified limits can lead to overheating, reduced lifespan, or even motor failure. Always refer to the manufacturer's datasheet and guidelines to determine the maximum torque, current, and speed ratings of the motor. Avoid overloading the motor to ensure safe and reliable operation.

 

5. Grounding: Proper grounding of the motor and associated electronics is essential for electrical safety and to minimize the risk of electrical interference. Follow recommended grounding practices and ensure that the motor's ground connection is secure and reliable.

 

6. Environmental Considerations: Take into account the operating environment of the stepper motor. If the motor is being used in a harsh or potentially hazardous environment (e.g., extreme temperatures, moisture, dust, or chemical exposure), consider using appropriate protective measures such as enclosures, sealing, or selecting motors specifically designed for such conditions.

 

7. Control and Monitoring: Implement proper control and monitoring systems to ensure the safe and reliable operation of the stepper motor. Use suitable motor drivers or controllers that provide features like overcurrent protection, stall detection, or thermal shutdown. Monitor the motor's temperature and other relevant parameters to detect any abnormalities or potential issues.

 

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