The 5840-31ZY is a heavy-duty, high-torque DC motor equipped with a specialized right-angle worm gearbox. Operating on a standard 12V DC rail, this assembly drops the internal motor speed down to a highly usable 120 RPM at the output shaft. The defining characteristic of a worm gear design is its self-locking architecture, meaning the output shaft cannot be rotated manually when power is disconnected. This makes it an exceptional choice for hoists, automated gates, rolling blinds, and robotic articulation joints where back-driving must be avoided.

Specifications

• Model Number: 5840-31ZY
• Motor Core: 31ZY Brushed DC Motor (Permanent Magnet)
• Gearbox Type: Right-Angle Worm Gear (Turbine style)
• Operating Voltage: 12V DC (Safe operational range: 6V - 15V)
• Output Shaft Speed: 120RPM (at 12V)
• Output Shaft Configuration: D-Cut shape, typically 8mm diameter with matching threads or cross-hole
• Rotation Direction: Bidirectional / Reversible (By swapping input wire polarity)
• Chassis Material: Rugged zinc alloy housing with full steel internal gears
• Current Profile:
  • No-Load Current: Approx 300mA - 450mA
  • Rated Load Current: Approx 1.5A - 2.5A
  • Stall Current (Peak): Approx 5.0A - 7.0A+ (Varies depending on exact load limitations)

Features

• Self-Locking Safety Function: Due to the physics of the worm-and-wheel gear geometry, the worm screw can easily turn the matching gear wheel, but the wheel cannot turn the worm screw. When power is shut off, the output shaft locks completely in place. This acts as a passive mechanical brake that holds up loads against gravity without consuming electricity.
• Right-Angle Output Profile: The output shaft exits at a 90℃ angle relative to the motor barrel. This layout allows the motor to tuck flush along flat surfaces, saving immense chassis space compared to inline planetary or spur gear motors.
• Massive Load Torque: Worm drives provide massive single-stage reduction ratios. This enables the 5840-31ZY to output exceptional stall and running torque, allowing it to move heavy loads smoothly without slipping.
• Full Metal Gear Train: Built using precision-machined steel gears housed in a dense alloy casing to handle intense torsional stress without stripping or cracking teeth under sudden impacts.

Common Applications

• Smart Home Automation: Powering motorized window curtains, rolling projector screens, and overhead garage door latch assemblies.
• Automated Barriers & Gates: Operating courtyard swinging gates, turnstiles, and security barriers that must stay locked when closed.
• Heavy Robotics & Winches: Driving small structural winches, boat anchor lifts, and high-load joints on heavy industrial or combat robots.
• Solar Tracking Systems: Powering heavy solar panel arrays to tilt slowly across the sky throughout the day, resisting high wind forces without drifting.

Usage & Safety Tips

• Factor in Peak Stall Currents: When pairing this motor with a power supply, battery bank, or motor driver (like an L298N, BTS7960, or IBT-2), ensure the system can safely output the peak stall current (Approx 7A). If your power source limits output to 2A, the motor will stall and cycle off the moment it encounters a heavy lifting load.
• Never Force Back-Driving: Never use pipe wrenches or levers to force the output shaft to rotate while the motor is unpowered. Trying to back-drive a worm gearbox manually will sheer off the internal gear teeth or fracture the zinc casing due to the self-locking physics.
• Mind the Radial Load Limits: While the gearbox outputs high torque, try to avoid placing excessive perpendicular bending stress directly on the shaft. Use a pillow block bearing support if the shaft is driving a long, heavy lever arm or pulley belt to prevent warping the internal gear alignment.
• Flyback Voltage Suppression: If operating this motor through mechanical switches or basic relays, solder a standard snubber diode or flyback diode across the terminals to clip the inductive voltage spikes generated when high-torque inductive loads are suddenly shut down.