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When purchasing a product, price is the consumer's primary concern. At present, YEJMKJ has 227 products for sale. YEJMKJ products range in price from $6.39 to $144.99, and the average price of all the products is about $27.92.

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Last Updated: Jan 9, 2026

YEJMKJ Nema 17 Stepper Motor Integrated 11.81in(300mm) T8 Lead Screw High Step Angle 1.8 Deg 1.7A High Torque 0.4Nm(56.64oz.in) 42x40 Bipolar Motor 2 Phase 4 Lead for 3D Printer DIY CNC with 1m Cable

3D Printer Motors
YEJMKJ Nema 17 Stepper Motor Integrated 11.81in(300mm) T8 Lead Screw High Step Angle 1.8 Deg 1.7A High Torque 0.4Nm(56.64oz.in) 42x40 Bipolar Motor 2 Phase 4 Lead for 3D Printer DIY CNC with 1m Cable Cover
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[High Torque]: Experience impressive performance with our 300mm Nema 17 lead screw stepper motor, offering outstanding torque for demanding applications.
[Parameters]: Body Length: 42mm/1.67inch; Step Angle: 1.8 degree; Phase: 2; Rated Current: 1.7A; Phase Resistance: 1.8Ω; Phase Inductance: 4.2mH; Holding Torque: 0.4Nm (56.64oz.in); Rotor Inertia: 57g.cm²; Weight: 291g.
[About Size]: Nema 17 Bipolar Lead Screw Stepper Motor: 42x42x40mm / 1.65x1.65x1.57inch, 42x42*40*300mm lead screw, Shaft Diameter: Φ 10mm, Shaft Length: 100mm, 2 phase, 4 wires: Red (A+), Blue (A-), Black(B+), Green (B-).
[Versatile Applications]: Nema17 lead screw stepper motor is widely used in 3D printer, CNC machine, laser engraving, medical equipment, and other automation systems. Its compact size and high torque make it suitable for various demanding applications.
[Package Kit]: Come with 1PCS 42MM Nema 17 lead screw stepper motor,a brass nut with 1m cable. If you have any concerns or questions during the purchasing process, please feel free to contact us and we will reply you as soon as possible.

YEJMKJ 3pcs ESP32 S3 Development Board ESP32-S3-DevKitC-1-N16R8 WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3-WROOM-1 Cores Microcontroller Processor Integrates Complete Wi-Fi and BLE Functions

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YEJMKJ 3pcs ESP32 S3 Development Board ESP32-S3-DevKitC-1-N16R8 WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3-WROOM-1 Cores Microcontroller Processor Integrates Complete Wi-Fi and BLE Functions Cover
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[Powerful Performance]: Equipped with a powerful ESP32-S3 chip, this development board offers enhanced processing capabilities, allowing you to handle complex tasks with ease.
[Seamless Connectivity]: With built-in Wi-Fi and Bluetooth capabilities, the ESP32-S3-DevKit C N8R2 Board ensures seamless connectivity to connect and control your devices effortlessly.
[Application]: Whether you're building smart home devices, industrial automation systems, or wearable gadgets, the ESP32-S3 module offers unparalleled flexibility and efficiency.
[User-Friendly Design]: This ESP32-S3 board features a compact size, easy-to-use interface, and compatibility with popular development tools, making it suitable for both beginners and experienced developers.
[After-Sales Service]: Our team is at your service 24/7, ready to address any inquiries or concerns you may have. Whether you need technical support, product guidance, or have questions about our policies, we are here to provide assistance and support.

YEJMKJ Nema 17 Lead Screw Stepper Motor 15.75in/400mm T8 Low impedance 1.7A Brass Nut 1m Cable 2 Phase 4 Lead 0.4Nm/56.64oz.in Bipolar High Torque 42x40mm Motors for 3D Printer/CNC Machine/Automation

3D Printer Motors
YEJMKJ Nema 17 Lead Screw Stepper Motor 15.75in/400mm T8 Low impedance 1.7A Brass Nut 1m Cable 2 Phase 4 Lead 0.4Nm/56.64oz.in Bipolar High Torque 42x40mm Motors for 3D Printer/CNC Machine/Automation Cover
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[Widely Apply]: The 42x42*40mm stepper motor with 400mm lead screw is widely used in CNC machine, laser engraving, 3D printer, medical equipment, and other automation systems. Its compact size and high torque make it ideal for a wide range of challenging applications.
[Size Notes]: Nema 17 Bipolar Lead Screw Stepper Motor: 42x42x40mm / 1.65x1.65x1.57inch, Shaft Diameter: Φ 10mm, Shaft Length: 100mm, 2 phase, 4 wires: Red (A+), Blue (A-), Black (B+), Green (B-).
[Specifications]:Phase Inductance: 4.2mH; Holding Torque: 0.4Nm (56.64oz.in); Body Length: 42mm/1.67inch; Step Angle: 1.8 degree; Phase: 2; Rated Current: 1.7A; Phase Resistance: 1.8Ω; Rotor Inertia: 57g.cm²; Weight: 291g.
[Packing Contents]: 1PCS 42MM Nema 17 400mm lead screw stepper motor,a brass nut with a 1m wiring harness designed for connector.
[Quick Response]: The lead screw stepper motor excels at swiftly responding to control signals, enabling rapid adjustments in position. This makes it ideal for scenarios demanding swift and precise actions.

YEJMKJ 5pcs ESP-WROOM-32 ESP32 ESP-32S Development Board Type-C USB Module 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller for Arduino IDE

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YEJMKJ 5pcs ESP-WROOM-32 ESP32 ESP-32S Development Board Type-C USB Module 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller for Arduino IDE Cover
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[Multiple Functions]: The ESP-WROOM-32 development board integrates a variety of peripherals, including capacitive touch sensors, Hall sensors, low noise amplifiers, SD card interface, Ethernet interface, and high-speed SDIO/SPI, UART, I2S, I2C, etc.
[High Performance]: The ESP32 HAT features a powerful dual-core CPU, enabling it to deliver exceptional performance for wireless WiFi and Bluetooth connectivity applications.
[Wireless Connectivity]: With built-in WiFi and Bluetooth capabilities, the ESP32 dual cores microcontroller allows seamless and reliable wireless communication, making it ideal for IoT projects and smart device control.
[Energy Efficient]: The WiFi + Bluetooth module is designed to be highly energy efficient, ensuring long battery life and reducing power consumption, making it suitable for low-power applications and portable devices.
[Easy Integration]: The ESP-32S board is compatible with a wide range of development platforms and programming languages, facilitating easy integration into existing projects and reducing development time.

YEJMKJ 2pcs ESP32 S3 Development Board ESP32-S3-DevKitC-1-N16R8 WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3-WROOM-1 Cores Microcontroller Processor Integrates Complete Wi-Fi and BLE Functions

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YEJMKJ 2pcs ESP32 S3 Development Board ESP32-S3-DevKitC-1-N16R8 WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3-WROOM-1 Cores Microcontroller Processor Integrates Complete Wi-Fi and BLE Functions Cover
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[User-Friendly Design]: This ESP32-S3 board features a compact size, easy-to-use interface, and compatibility with popular development tools, making it suitable for both beginners and experienced developers.
[Application]: Whether you're building smart home devices, industrial automation systems, or wearable gadgets, the ESP32-S3 module offers unparalleled flexibility and efficiency.
[Powerful Performance]: Equipped with a powerful ESP32-S3 chip, this development board offers enhanced processing capabilities, allowing you to handle complex tasks with ease.
[Seamless Connectivity]: With built-in Wi-Fi and Bluetooth capabilities, the ESP32-S3-DevKit C N8R2 Board ensures seamless connectivity to connect and control your devices effortlessly.
[After-Sales Service]: Our team is at your service 24/7, ready to address any inquiries or concerns you may have. Whether you need technical support, product guidance, or have questions about our policies, we are here to provide assistance and support.

YEJMKJ ESP32 CAM Development Board ESP32-CAM 8MP OV2640 Camera Module, WiFi Bluetooth Module ESP32-CAM-MB Micro USB to Serial Port CH340G with TF Card Slot for Raspberry Pi for Arduino

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YEJMKJ ESP32 CAM Development Board ESP32-CAM 8MP OV2640 Camera Module, WiFi Bluetooth Module ESP32-CAM-MB Micro USB to Serial Port CH340G with TF Card Slot for Raspberry Pi for Arduino Cover
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[High Resolution Imaging]: The ESP32-CAM development board is equipped with a high-resolution camera module, allowing you to capture images and videos with exceptional clarity and detail. It enables you to create projects that require accurate visual data.
[Powerful Connectivity]: Equipped with ESP32 Wi-Fi and Bluetooth module, the ESP32-CAM development board offers seamless wireless connectivity. You can easily connect it to your home network or mobile device, enabling remote control and data transmission.
[Versatile GPIO Pins]: The ESP32-CAM board comes with a rich set of GPIO pins, allowing you to connect and control various sensors, actuators, and external devices. This versatility opens up countless possibilities for creating interactive and responsive projects.
[Compact & Portable]: The wifi bluetooth panel is compact in size, making it ideal for projects that require a small form factor. Its portability allows you to take your projects on the go and explore various applications where space is limited.
[Easy Programming and Development]: The ESP32-CAM module is compatible with Arduino IDE, making it easy for both beginners and experienced developers to program and develop projects.

YEJMKJ ESP32 S3 Development Board ESP32-S3-DevKitC-1-N8R8 Cores Microcontroller Processor with Wi-Fi and BLE Functions ESP32-S3-WROOM-1 ESP32-S3 WiFi + Bluetooth MCU Module, Dual Type-C Hat

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YEJMKJ ESP32 S3 Development Board ESP32-S3-DevKitC-1-N8R8 Cores Microcontroller Processor with Wi-Fi and BLE Functions ESP32-S3-WROOM-1 ESP32-S3 WiFi + Bluetooth MCU Module, Dual Type-C Hat Cover
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[Powerful performance]: The ESP32-S3-WROOM-1 n8r8 chip has a built-in dual-core processor, powerful computing power and rich peripheral interfaces, which enhances the range of its available resources and greatly improves the convenience of learning and development. Of course, ESP WROOM 32 S3 n8r8 can also be widely used in IoT occasions
[Widely used]: ESP-32-S3 n8r8 can be used for development in the fields of IoT, smart home, smart wear, etc.
[Wireless connection]: ESP32 S3 DevKitC 1 Dual Cores Microcontroller Supports Wi-Fi and Bluetooth LE wireless connections, which is convenient for communication with other devices.
[Easy to develop]: ESP32 S3 DevKitC 1 can be programmed using development environments such as for Arduino IDE. The security mechanism enables the chip to meet strict security requirements and supports multiple programming languages, such as C, C++, Python, etc.
[Rich interfaces]: The ESP32 wroom S3 development board leads out the pins of the chip, making it convenient for users to connect various peripheral devices such as sensors, displays, etc. ESP32 S3 WROOM 1 is convenient to use

YEJMKJ 3pcs ESP32 ESP-32S Development Board ESP-WROOM-32 Module 2.4GHz Dual-Mode WiFi + Bluetooth Processor 2-in-1 Dual Cores Microcontroller Integrated Chip CP2102 for Arduino IDE

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YEJMKJ 3pcs ESP32 ESP-32S Development Board ESP-WROOM-32 Module 2.4GHz Dual-Mode WiFi + Bluetooth Processor 2-in-1 Dual Cores Microcontroller Integrated Chip CP2102 for Arduino IDE Cover
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[Multiple Functions]: The ESP-WROOM-32 development board integrates a variety of peripherals, including capacitive touch sensors, Hall sensors, low noise amplifiers, SD card interface, Ethernet interface, and high-speed SDIO/SPI, UART, I2S, I2C, etc.
[High Performance]: The ESP32 HAT features a powerful dual-core CPU, enabling it to deliver exceptional performance for wireless WiFi and Bluetooth connectivity applications.
[Wireless Connectivity]: With built-in WiFi and Bluetooth capabilities, the ESP32 dual cores microcontroller allows seamless and reliable wireless communication, making it ideal for IoT projects and smart device control.
[Energy Efficient]: The WiFi + Bluetooth 2-in-1 module is designed to be highly energy efficient, ensuring long battery life and reducing power consumption, making it suitable for low-power applications and portable devices.
[Easy Integration]: The ESP-32S WLAN board is compatible with a wide range of development platforms and programming languages, facilitating easy integration into existing projects and reducing development time.

YEJMKJ 2pcs ESP32-S3-DevKitC-1-N8R2 Development Board ESP32 S3 WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3-WROOM-1 Cores Microcontroller Processor Integrates Complete Wi-Fi and BLE Functions

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YEJMKJ 2pcs ESP32-S3-DevKitC-1-N8R2 Development Board ESP32 S3 WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3-WROOM-1 Cores Microcontroller Processor Integrates Complete Wi-Fi and BLE Functions Cover
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[Powerful Performance]: Equipped with a powerful ESP32-S3 chip, this development board offers enhanced processing capabilities, allowing you to handle complex tasks with ease.
[Seamless Connectivity]: With built-in Wi-Fi and Bluetooth capabilities, the ESP32-S3-DevKit C N8R2 Board ensures seamless connectivity to connect and control your devices effortlessly.
[User-Friendly Design]: This ESP32-S3 board features a compact size, easy-to-use interface, and compatibility with popular development tools, making it suitable for both beginners and experienced developers.
[Application]: Whether you're building smart home devices, industrial automation systems, or wearable gadgets, the ESP32-S3 module offers unparalleled flexibility and efficiency.
[After-Sales Service]: Our team is at your service 24/7, ready to address any inquiries or concerns you may have. Whether you need technical support, product guidance, or have questions about our policies, we are here to provide assistance and support.

YEJMKJ 3pcs ESP32 S3 Development Board N16R8 ESP WROOM 32 S3 WiFi+Bluetooth IoT Type-C Core Board Development Hat WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3 DevKitC 1

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YEJMKJ 3pcs ESP32 S3 Development Board N16R8 ESP WROOM 32 S3 WiFi+Bluetooth IoT Type-C Core Board Development Hat WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3 DevKitC 1 Cover
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[Smart functions]: ESP32 S3 DevKitC 1 is used in smart home automation systems to industrial monitoring equipment, ESP32 S3WROOM 1 N16R8 development board can be used in a wide range of applications
[Powerful Performance]: If you are equipped with a powerful ESP32-S3 chip, you can better use this development board to provide enhanced processing power, allowing you to easily handle complex tasks.
[Application Function]: Whether you are an experienced developer or a curious hobbyist, using ESP32-S3-WROOM-1 is an ideal choice for anyone who wants to create a powerful and innovative Internet of Things
[Product Features]: ESP32 S3 DevKitC 1 development board is a must-have for anyone interested in easily creating cutting-edge IoT projects
[Seamless connection]: With built-in Wi-Fi and Bluetooth functions, the ESP32-S3-DevKitC-1-N16R8 development board ensures seamless connectivity, making it easy to connect and control your devices

YEJMKJ 5pcs ESP32 S3 Development Board N8R8 Hat ESP32-S3-DevKitC-1-N8R8 WiFi and Bluetooth MCU Module Dual Type-C ESP32-S3-WROOM-1 ESP32-S3 Core Microcontroller Processor ESP-WROOM-32 S3

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YEJMKJ 5pcs ESP32 S3 Development Board N8R8 Hat ESP32-S3-DevKitC-1-N8R8 WiFi and Bluetooth MCU Module Dual Type-C ESP32-S3-WROOM-1 ESP32-S3 Core Microcontroller Processor ESP-WROOM-32 S3 Cover
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[Connectivity Function]: ESP WROOM 32 can easily and seamlessly connect and control your device network. ESP32 S3 has excellent Wi-Fi and Bluetooth functions.
[Powerful performance]: ESP32-S3-DevKitC-1 can be widely used in IoT applications for data collection, monitoring, and mechanical control. Because the ESP32-S3-WROOM-1 chip has a built-in dual-core processor, powerful computing power, and rich peripheral interfaces, it expands its available resource range and greatly improves the convenience of learning and development.
[Application function]: Whether you are an experienced developer or a curious amateur, using ESP32-S3-WROOM-1 is an ideal choice for anyone who wants to create a powerful and innovative Internet of Things. The availability of a rich ecosystem (including development boards, libraries and tools) further simplifies the development process.
[Seamless Connection]: The ESP32-S3-DevKitC-1-N8R8 development board has built-in Wi-Fi and Bluetooth functions to ensure seamless connectivity, allowing you to easily connect and control devices and automate electronic products.
[Product Features]: The ESP32 S3 DevKitC 1 development board is interested in easily creating cutting-edge IoT projects that can be implemented in industrial environments for data collection, monitoring, and controlling machinery.

YEJMKJ ESP-WROOM-32 ESP32 ESP-32S Development Board Type-C USB Module 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller for Arduino IDE

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YEJMKJ ESP-WROOM-32 ESP32 ESP-32S Development Board Type-C USB Module 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller for Arduino IDE Cover
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[Multiple Functions]: The ESP-WROOM-32 development board integrates a variety of peripherals, including capacitive touch sensors, Hall sensors, low noise amplifiers, SD card interface, Ethernet interface, and high-speed SDIO/SPI, UART, I2S, I2C, etc.
[High Performance]: The ESP32 HAT features a powerful dual-core CPU, enabling it to deliver exceptional performance for wireless WiFi and Bluetooth connectivity applications.
[Wireless Connectivity]: With built-in WiFi and Bluetooth capabilities, the ESP32 dual cores microcontroller allows seamless and reliable wireless communication, making it ideal for IoT projects and smart device control.
[Energy Efficient]: The WiFi + Bluetooth module is designed to be highly energy efficient, ensuring long battery life and reducing power consumption, making it suitable for low-power applications and portable devices.
[Easy Integration]: The ESP-32S board is compatible with a wide range of development platforms and programming languages, facilitating easy integration into existing projects and reducing development time.

YEJMKJ Nema 17 Lead Screw Stepper Motor 12.20in/310mm T8 Standard Step Angle 1.8 Deg 2000 Steps/rev High Torque 0.4Nm/56.64oz.in. Bipolar Motors 2 Phase 4 Lead for CNC 3D Printer 1.65x1.65x1.57inch

3D Printer Motors
YEJMKJ Nema 17 Lead Screw Stepper Motor 12.20in/310mm T8 Standard Step Angle 1.8 Deg 2000 Steps/rev High Torque 0.4Nm/56.64oz.in. Bipolar Motors 2 Phase 4 Lead for CNC 3D Printer 1.65x1.65x1.57inch Cover
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[Standard Step Angle]：stepper motor with 2000 steps/rev provides precise position control in diverse fields, enhancing system performance and efficiency.
[Specifications]: Body Length: 42mm/1.67inch; Step Angle: 1.8 degree; Phase: 2; Rated Current: 1.7A; Phase Resistance: 1.8Ω; Phase Inductance: 4.2mH; Holding Torque: 0.4Nm (56.64oz.in); Rotor Inertia: 57g.cm²; Weight: 291g. Lead Screw: 310mm
[High Torque]: The 0.4Nm torque stepper motor is fit for many small applications, such as small robots, automation devices and precision instruments. This torque is sufficient to provide precise positioning and control for applications requiring high-precision motion.
[Application]: In 3D printers, the stepper motor is used to control the movement of the print head, allowing it to be positioned precisely along the X, Y and Z axes, enabling high-precision layering during the printing process. In CNC machine tools and automation, the stepper motor is used to control the movement of the tool or workpiece table for precise cutting or engraving operations.
[Packing List]: Including 1PCS 42x42*40*310mm Nema 17 bipolar lead screw stepper motor,a brass nut with 1m wiring harness designed for connector. Welcome to consult us.

YEJMKJ Nema 34 Closed Loop Stepper Motor Kit with Closed Loop Stepper Driver 1.8‌°‌ 2 Phase High Torque 10Nm(1416.12oz·in) Bipolar 6.4A 0.6Ω 117mm Cable 3M for CNC Lathe Router 3D Printer DIY Robot

3D Printer Motors
YEJMKJ Nema 34 Closed Loop Stepper Motor Kit with Closed Loop Stepper Driver 1.8‌°‌ 2 Phase High Torque 10Nm(1416.12oz·in) Bipolar 6.4A 0.6Ω 117mm Cable 3M for CNC Lathe Router 3D Printer DIY Robot Cover
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Dimensional data: Key dimensions for Nema 34 closed loop stepper motor kit with stepper driver include the following. Body size 86x86x116.5mm (3.39x3.39x4.59in), Shaft diameter Ø14mm, Shaft length 37mm, Key 5×5×25mm, Installation hole distance 69.6mm, Motor lead color Black (A+) Green (A-) Red (B+) Blue (B-) incl. Cable 3M, Weight 4268g.
Characteristics: Nema 34 Closed Loop Stepper Moto with driver kit, 2 Phase, Step angle 1.8‌ Degree(200 steps/rev), Holding torque 10Nm (1416.12oz·in), Resistance 0.6Ω, Rated current 6.4A, Rotor inertia, Inductance 5.4mH±20%.
Safety Data: Operating safely and reliably, this Nema 34 Step motor with closed-loop controller kit comes with the following key safety parameters. Dielectric strength 500V A.C 1 MINUTE; Temperature rise 80K MAX; Insulation resistance 100MΩ MIN; Insulation class(UL) B (130℃) [266°F]; Operation ambient temperature -20℃～+50℃ [-4°F～122°F]; Operation ambient humidity 15%RH～95%RH.
High Torque Low Noise: Our upgraded Nema 34 Closed Loop Stepper Motor Kit with Closed Loop Stepper Controller provides up to 20% higher holding torque. The refined steel core and advanced winding configuration promote efficient, smooth-running mechanics with substantially reduced operational noise for a cleaner working environment.
Important Considerations: Faster speeds lead to lower torque, with recommended up to 1800 RPM for closed-loop. Lower current reduces torque and temperature rise, while lower voltage decreases torque (recommended range: 48–80V DC). The Nema 34 Closed Loop Stepper Motor Kit with Closed Loop Stepper Driver is used in various applications like 3D printers, DIY robots, and CNC machines, offering a compact design and high torque for demanding tasks.

YEJMKJ ESP8266 Serial Wireless Module CH340 ESP-12E NodeMCU LUA WiFi V3 Internet Development Board Compatible with Arduino IDE, Micropython

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YEJMKJ ESP8266 Serial Wireless Module CH340 ESP-12E NodeMCU LUA WiFi V3 Internet Development Board Compatible with Arduino IDE, Micropython Cover
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[High-Speed Wireless Connectivity]: The ESP8266 development board provides fast and reliable wireless connectivity, allowing easy access to your devices or the Internet.
[Compact and Versatile Design]: With its small form factor, the CH340 ESP-12E board is perfect for integrating into various electronic projects or IoT applications, offering flexibility and convenience.
[Powerful Performance]: Equipped with powerful ESP6266 microcontroller (ESP-12E), the serial wireless module delivers exceptional performance, ensuring seamless communication and data transmission over WiFi networks.
[Easy to Use and Program]: The ESP8266 NodeMCU panel offers a user-friendly interface and extensive documentation, making it easy for developers and hobbyists to use and program. It supports popular programming languages and frameworks for convenient integration.
[Open-Source Development]: The NodeMCU LUA board is supported by a large online community, offering extensive resources for developers. This open-source approach allows for customizing and expanding its capabilities as needed.

YEJMKJ Nema 14 Stepper Motor 2 Phase 1.8‌°‌ 12Ncm(16.99oz·in) High Torque Bipolar 29mm 4.5Ω 0.6A 4-Lead Shaft 20.5mm φ5mm 35 Stepper Motor incl. Cable 1M for 3D Printer DIY Robot CNC Machine

3D Printer Motors
YEJMKJ Nema 14 Stepper Motor 2 Phase 1.8‌°‌ 12Ncm(16.99oz·in) High Torque Bipolar 29mm 4.5Ω 0.6A 4-Lead Shaft 20.5mm φ5mm 35 Stepper Motor incl. Cable 1M for 3D Printer DIY Robot CNC Machine Cover
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Dimensional details: The physical dimensions of a Nema 14 Stepper Motor are summarized below. Body size 35x35x28.2mm(1.38x1.38x1.12in), Shaft length 20.5±0.5mm, Shaft diameter φ5mm, D-cut length 16.5mm, Installation hole distance 26mm, incl. Cable 1m, 4-Lead Black (A+) Green (A-) Red (B+) Blue (B-), Weight 157g.
Specifications: Nema 14 mini stepper motor 2 Phase, Step angle 1.8‌ Degree (200 steps/rev), Holding torque 12Ncm (16.99oz·in), Resistance 4.5Ω, Rated current 0.6A, Rotor inertia approx 12g.cm², Inductance 6.5mH±20%.
Safety: Operating safely and reliably, this Nema14 Stepper motor comes with the following key safety parameters. Dielectric strength 500V A.C 1 MINUTE; Insulation class(UL) B (130℃) [266°F]; Insulation resistance 100MΩ MIN; Operation ambient temperature -20℃ ～+50℃ [-4°F～122°F]; Operation ambient humidity ; Temperature rise 80K MAX.
Important Insights: Faster speeds lead to lower torque; the recommended operating range is 0–600 RPM. Lower current reduces torque and temperature rise, while lower voltage decreases torque (recommended range: 12–24V DC). The 35mm Stepper Motor fits 3D printers, DIY robots, CNC machines, and other automated systems, offering a small size and high torque for performance-driven tasks.
Smooth, Powerful Drive: Our upgraded Nema 14 Step Motor delivers up to 20% greater holding torque than typical models. Featuring enhanced steel cores and refined windings, it operates with noticeably reduced noise for smoother, less disruptive machine performance.

YEJMKJ Nema 17 Stepper Motor 60MM Bipolar 2 A 70Ncm (99.12oz.in) Nema17 42 Motor 2 Phase 4-Lead Stepper Motors 1.8 Degree with 1m Cable and Connector for DIY CNC 3D Printer, 1.66x1.66x2.37inch

3D Printer Motors
YEJMKJ Nema 17 Stepper Motor 60MM Bipolar 2 A 70Ncm (99.12oz.in) Nema17 42 Motor 2 Phase 4-Lead Stepper Motors 1.8 Degree with 1m Cable and Connector for DIY CNC 3D Printer, 1.66x1.66x2.37inch Cover
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[Specifications]: Body Length: 60mm/2.37inch; Step Angle: 1.8 degree; Phase: 2; Rated Voltage: 3.2V; Rated Current: 2A; Phase Resistance: 1.6Ω; Phase Inductance: 3.6mH; Holding Togque: 70N.cm (99.12oz.in); Detent Togque: 2.8N.cm (3.96oz.in); Weight: 480g.
[Size]: Nema 17 Bipolar Stepper Motor: 42x42x60mm / 1.66x1.66x2.37inch, Shaft Diameter: Φ 5mm ( D Shaft Φ 4.5mm ), Shaft Length: 22mm, 2 phase, 4 leads.
[High Torque]: Experience powerful performance with our Nema 17 3D printer stepper motors, delivering exceptional torque for demanding applications.
[Superior Performance]: Experience the power of our 42 stepper motors, delivering outstanding performance to meet the demands of your challenging projects.
[Packing List]: Come with 1PCS 60MM Nema 17 stepper motor and 1PCS 1m 4pins cable and connector. If you have any concerns or questions during the purchasing process, our customer service team is ready to assist you.

YEJMKJ 10Pack Nema 17 Stepper Motor 2 Phase 1.8‌°‌ 0.6Nm(84.97oz·in) High Torque Bipolar 47mm 1.6Ω 2.3A 4-Lead Shaft 24mm φ5mm 42 Stepper Motor Cable 1M for 3D Printer DIY Robot CNC Machine

3D Printer Motors
YEJMKJ 10Pack Nema 17 Stepper Motor 2 Phase 1.8‌°‌ 0.6Nm(84.97oz·in) High Torque Bipolar 47mm 1.6Ω 2.3A 4-Lead Shaft 24mm φ5mm 42 Stepper Motor Cable 1M for 3D Printer DIY Robot CNC Machine Cover
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Specifications: Nema 17 Stepper Motor 2 Phase, Step angle 1.8‌ Degree (200 steps/rev), Holding torque 0.6Nm (84.97oz·in), Resistance 1.6Ω, Rated current 2.3A, Rotor inertia approx 85g.cm², Inductance 2.0mH±20%.
Performance Data: Nema 17 Stepper Motor has the following various dimensional parameters. Body size 42x42x46.7mm(1.66x1.66x1.84in), Shaft length 24±0.5mm, Shaft diameter φ5mm, D-cut length 24mm, Installation hole distance 31mm, incl. Cable 1m, 4-Lead Black (A+) Green (A-) Red (B+) Blue (B-), Weight 368g.
Safety: The safe and reliable operation of this Nema 17 Step Motor is supported by these key safety parameters. Dielectric strength 500V A.C 1 MINUTE; Insulation class(UL) B (130℃) [266°F]; Insulation resistance 100MΩ MIN; Operation ambient temperature -20℃ ～+50℃ [-4°F～122°F]; Operation ambient humidity 15%RH～95%RH; Temperature rise 80K MAX.
More Power, Less Noise: This upgraded Nema 17 Step Motor utilizes fortified steel cores and optimized windings to reliably deliver up to 20% increased holding torque. Designed specifically for low-noise output, it fosters smoother machine functionality and reduces ambient sound interference effectively.
Important Notes: Higher speed leads to a reduction in torque, with operation recommended at 0–600 RPM and closed-loop up to 1800 RPM. Lower current reduces both torque and temperature rise, and lower voltage decreases torque (optimal range: 12–24V DC). The 42mm Stepper Motor is used in 3D printers, DIY robots, CNC machines, and other automated systems. Its compact size and high torque suit demanding applications.

YEJMKJ ESP32 S2 Mini V1.0.0 WiFi Board Based ESP32-S2FN4R2 ESP32-S2 4MB Flash 2MB PSRAM Type-C USB Connect Mini Module for MicroPython

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YEJMKJ ESP32 S2 Mini V1.0.0 WiFi Board Based ESP32-S2FN4R2 ESP32-S2 4MB Flash 2MB PSRAM Type-C USB Connect Mini Module for MicroPython Cover
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[Versatile Connectivity]: With built-in Wi-Fi and Bluetooth capabilities, this mini development board offers seamless connectivity options for a wide range of IoT applications. PLEASE NOTE: After connecting the USB, you need to simultaneously press the two buttons on the board for it to function properly.
[Easy to Program]: The ESP32 S2 mini development board supports popular development tools and programming languages, making it convenient for developers of all levels to get started quickly and prototype their ideas with ease.
[Low Power Consumption]: The mini wifi board is designed with energy efficiency in mind. It features a low-power mode and optimized power management, allowing for prolonged battery life and reducing overall power consumption. This makes it ideal for battery-powered or energy-conscious projects.
[Easy Integration]: The ESP32 S2 mini panel is compatible with a wide range of development platforms and programming languages, facilitating easy integration into existing projects and reducing development time.
[Rich I/O Interface]: Despite its compact size, the ESP32-S2 HAT offers a rich set of I/O interfaces including ADC, DAC, GPIO, SPI, I2C, USRT, USB OTG, and more, allowing you to connect a wide range of sensors, actuators, and peripherals.

YEJMKJ ESP32-S3-DevKitC-1-N16R8 ESP32 S3 Development Board WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3-WROOM-1 Cores Microcontroller Processor Integrates Complete Wi-Fi and BLE Functions

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YEJMKJ ESP32-S3-DevKitC-1-N16R8 ESP32 S3 Development Board WiFi + Bluetooth MCU Module, Dual Type-C ESP32-S3-WROOM-1 Cores Microcontroller Processor Integrates Complete Wi-Fi and BLE Functions Cover
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[Powerful Performance]: Equipped with a powerful ESP32-S3 chip, this development board offers enhanced processing capabilities, allowing you to handle complex tasks with ease.
[Seamless Connectivity]: With built-in Wi-Fi and Bluetooth capabilities, the ESP32-S3-DevKit C N16R8 Board ensures seamless connectivity to connect and control your devices effortlessly.
[User-Friendly Design]: This ESP32-S3 board features a compact size, easy-to-use interface, and compatibility with popular development tools, making it suitable for both beginners and experienced developers.
[Application]: Whether you're building smart home devices, industrial automation systems, or wearable gadgets, the ESP32-S3 module offers unparalleled flexibility and efficiency.
[After-Sales Service]: Our team is at your service 24/7, ready to address any inquiries or concerns you may have. Whether you need technical support, product guidance, or have questions about our policies, we are here to provide assistance and support.

YEJMKJ FAQs

Yes, YEJMKJ is a legitmate brand on Amazon. After conducting a comprehensive analysis of 20 customer reviews for YEJMKJ products on Amazon, we have determined its average rating. With a strong performance and good quality, YEJMKJ has received an average rating of 4.62 from numerous buyers, indicating that YEJMKJ are trustworthy and live up to their claims. Therefore, it is safe to make purchases from YEJMKJ on Amazon.

Amazon has strict policies and safety measures in place that ensure only legitimate sellers and products are allowed on their platform. It also provides a secure payment gateway and offers buyer protection, ensuring your transaction is safe. In the unlikely event that there's an issue with your purchase, Amazon's customer service and return policies are designed to protect your interests.

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