JGY-370 12V 90 RPM DC Worm Gear Motor - Self-Locking 6mm D-Shaft

Specifications

• Model: JGY-370

• Operating Voltage: 12V DC

• No-Load Speed: 90 RPM

• Torque: 1.3 kg.cm
  
• Stall Torque: 6 kg.cm

• Shaft Type: D-Shape

• Shaft Diameter: 6mm

• Shaft Length: 15mm Total (11.5mm D-cut)

• Mounting Holes: 4 x M3

• Mounting Hole Spacing: 18mm x 33mm

• Motor Body Diameter: 24.4mm

• Gearbox Dimensions: 46mm (L) x 32mm (W) x 25.2mm (H)

• Terminals: Dual Solder Tabs

Key Applications and Projects

• Smart Window Blinds: Motorizing heavy indoor roller blinds. The self-locking gear ensures the blinds won't slowly unroll under their own weight when the motor turns off.

• Automated Pet Doors: Creating a rack-and-pinion sliding door for a chicken coop or dog door that cannot be pried open by predators.

• Robotic Grippers: Powering the clamping mechanism on a robotic arm where holding force is required without continuous power consumption.

Unlock New Capabilities (Project Evolution)

• The IoT Automated Coffee Roaster: Take your DIY projects to the next level by building a custom coffee bean roaster! Pair this 90 RPM JGY-370 motor with a metal roasting drum and a 12V PWM Speed Controller. The worm gear provides the necessary torque to tumble the heavy beans smoothly. Add an ESP32 microcontroller and a high-temperature thermocouple, and you can create a Wi-Fi-connected roaster that logs roasting curves straight to your smartphone!

ACCESSORIES / PACKAGE INCLUDED

• 1 x JGY-370 12V 90 RPM DC Worm Gear Speed Reduction Motor

This video describes the working principle of Worm Gear.

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What is the operating voltage for this motor? This motor is optimized to run on a 12V DC power supply.

2. What is the rotational speed? It spins at approximately 90 RPM (Revolutions Per Minute) at 12V with no load.

3. What size is the output shaft? The shaft has a 6mm outer diameter.

4. What does "D-Shape" mean? The cylindrical shaft has an 11.5mm long flat section machined into it (resembling the letter "D"), preventing wheels or pulleys from slipping when a set screw is tightened against it.

5. What is a "Worm Gear" motor? It uses a screw-like gear interfacing with a spur gear at a 90-degree angle. This provides massive gear reduction in a compact shape and creates a self-locking effect.

6. Is this motor self-locking? Yes. Due to the inherent friction of the worm gear design, the output shaft cannot be easily rotated by hand when the motor is off.

7. Can I reverse the direction of rotation? Yes. By simply swapping the positive and negative connections on your 12V power supply, the motor will spin in the opposite direction.

8. What size mounting screws do I need? The gearbox face accepts standard metric M3 machine screws.

9. What is the spacing between the mounting holes? The four M3 holes are spaced 18mm apart horizontally and 33mm apart vertically.

10. How long is the actual shaft? The protruding shaft is 15mm long in total.

11. Can I run this motor on 5V? Yes, a 12V DC motor will spin on 5V, but it will run at less than half the speed (around 35-40 RPM) and produce significantly less torque.

12. Is this motor waterproof? No, the metal housing and the rear solder terminals are completely exposed. It must be protected in an enclosure if used outdoors.

13. Can I control the speed of this motor? Yes, you can use a standard PWM (Pulse Width Modulation) DC motor speed controller or an H-Bridge (like an L298N) to vary the speed electronically.

14. How do I connect wires to this motor? There are two metal tabs on the rear of the cylindrical motor body. You will need to use a soldering iron to attach your positive and negative wires to these tabs.

15. Does the motor come with wires attached? No, it ships with bare solder terminals.

16. What is the diameter of the cylindrical motor body? The round motor section has a diameter of 24.4mm.

17. What is the total length of the motor and gearbox? Combined, the unit is roughly 76.8mm long (46mm for the gearbox + 30.8mm for the motor body).

18. Can I manually turn the shaft to adjust my project when it's off? No. Because it is a worm gear, forcing the shaft to turn by hand will strip and destroy the internal gears. You must use electricity to move it.

19. Will this work for a DIY smart blinds project? Absolutely. The 90 RPM speed is ideal for rolling mechanisms, and the self-locking feature ensures the blinds stay exactly where you leave them.

20. What type of coupling do I need to attach a wheel? You should look for a 6mm rigid flange coupling or a 6mm flexible shaft coupler that features a set screw to clamp down on the D-shaft profile.