Nema 17 Stepper Motor 42mm Step Motor 0.9 deg 1.8 Deg- Suzhou Retek Electric Technology Co., Ltd.

NEMA 17 Stepper: The Standard for Cartesian Motion Systems

The NEMA 17 stepper motor, with its 1.7 inch (approx. 42mm) square face, is the most ubiquitous stepper frame size in desktop automation.

We offer both the standard 1.8∘ (200 steps/rev) and the high-resolution 0.9∘ (400 steps/rev) variants. The choice depends on the required positional resolution versus the motor's speed capability. The 0.9∘ version offers twice the native resolution, resulting in smoother micro-stepping and better positional accuracy, but typically comes with a slight reduction in maximum speed/torque. The NEMA 17 is a balanced design, offering high holding torque while maintaining a compact form factor suitable for moving gantries and medium-duty positioning stages.

Introduction

Detailed Parameters and Performance Data

RETEK: Optimized Stepper Performance for Automation

Suzhou Retek Electric Technology Co., Ltd. provides NEMA 17 motors optimized for low-inductance windings, allowing higher current rise rates and thereby extending the motor's useful torque range at higher stepping speeds. Our motors are widely integrated into CNC routers, laser engravers, and medical dispensing machines worldwide. We focus on low detent torque (unpowered holding torque) to minimize mechanical resistance, which is critical for systems with external load forces.

Applications

Advanced Technology Highlights

Key Applications for NEMA 17 Stepper Motors

Desktop CNC and Milling Machines: Motors for X, Y, and Z axes for light to medium cutting loads. Challenge: Balancing holding torque and high-speed capability.
Pick-and-Place Robotics: Actuators for linear slides and rotational grippers requiring precise indexing.
Lab Equipment: Syringe pumps, automated microscopes, and fluid sampling devices.
Commercial Vending Machines: Drive mechanisms for item dispensing.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (NEMA 17 Series)

Parameter	Range / Typical Value	Unit
Frame Size (NEMA)	17 (42mm)	Standard
Step Angle Options	0.9 or 1.8	Degrees
Holding Torque	0.3 to 0.8	Nm
Rotor Inertia	Optimized Low	g ⋅ cm$^2$
Voltage Compatibility	Bipolar Drive (12V to 48V Bus)	Type

Additional Information

Supplementary Details & Notes

Integrated Production and Customization Workflow

Production includes low-friction bearing selection and precise stack alignment. Final testing involves measuring the phase inductance, resistance, and step-angle accuracy under load.

Lead Screw Integration: Factory mounting of precision leadscrews (e.g., T8 trapezoidal) with anti-backlash nuts for integrated linear actuators.
Winding Customization: Offering high-voltage/low-current windings (for long cable runs) or low-voltage/high-current windings (for maximum torque).
Integrated Dampers: Providing optional motor dampers (mass-spring systems) to reduce resonant vibration and audible noise during mid-range stepping.
Connector Options: Customizing connector types (e.g., Molex, JST, or industrial M12) and cable harness length for plug-and-play assembly.

Service & Support

Technical Advantages and Core Design Features

Dual Resolution Option: Choice between 1.8∘ (speed/torque focus) and 0.9∘ (resolution/smoothness focus) to meet diverse application needs.
Low Detent Torque: Minimized residual torque when unpowered, facilitating easier manual adjustment or zero-point homing procedures.
High Performance at Low Speed: Delivers maximum torque during the acceleration and low-speed phases where the motor operates optimally.
Integral Leadscrew Option: Available with a factory-integrated, precision-rolled leadscrew for direct linear motion conversion.
Hybrid Stepper Technology: Utilizing both a toothed rotor and permanent magnets for high torque and low step error.

Frequently Asked Questions

Common Inquiries Regarding NEMA 17 Steppers

Q: When should I choose the 0.9∘ step angle over 1.8∘?
A: Choose 0.9∘ when the system requires very smooth motion at low speeds, or when micro-stepping is used to achieve extremely high positional accuracy (e.g., optical alignment). Choose 1.8∘ for applications prioritizing high maximum torque and speed.

Q: How does the motor's current rating relate to the drive voltage?
A: The current rating specifies the maximum continuous phase current. The drive voltage (e.g., 24V or 48V) is typically much higher than the motor's rated winding voltage and is used to overcome the motor's inductance, thereby forcing current into the windings faster and boosting high-speed torque.

Q: Can I use an encoder with a NEMA 17 stepper?
A: Yes. Integrating an encoder enables a closed-loop stepper system (often called "servo-stepper"), which provides stall detection, step error correction, and position verification, eliminating the risk of lost steps under load.

Resources

Advanced Material Selection Guide

Magnets: High-flux density NdFeB magnets, ensuring maximum magnetic strength for high holding torque within the 42mm frame.

Shaft: Precision-ground stainless steel shaft (5mm or 6.35mm standard diameters) for low run-out and durable coupling.

End Bells: Die-cast aluminum end bells for structural rigidity and effective heat transfer to the mounting plate.

About Suzhou Retek Electric Technology Co., Ltd.

Unlike other motor suppliers, Retek engineering system prevents the selling of our motors and components by catalogue as every model is customized for our customers. The customers are assured that every component they receive from Retek is designed with their exact specifications in mind. Our total solutions are a combination of our innovation and a close working partnership with our customers and suppliers.

As China Nema 17 Stepper Motor 42mm Step Motor 0.9 deg 1.8 Deg Manufacturers and Wholesale Nema 17 Stepper Motor 42mm Step Motor 0.9 deg 1.8 Deg OEM/ODM Suppliers, Retek business consists of three platforms: Motors, Die-Casting and CNC manufacturing and wire harness. Retek products are widely supplied for residential fans, vents, boats, airplanes, medical facilities, laboratory facilities, trucks and other automotive machines.

Welcome to send us an RFQ, it is believed you will get the best cost-effective products and services here!

Customized Solutions

Quality Assurance

Global Export

Suzhou Retek Electric Technology Co., Ltd.

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