The JS50-385 is a robust, high-speed micro-reduction DC gear motor that combines a high-performance 385 carbon-brush motor core with an integrated, rugged gearbox assembly. Operating on a standard 12V DC rail, the raw internal motor spins at an impressive 12,000RPM. This raw velocity is fed through an internal reduction gear train, converting high speed into heavy-duty mechanical output torque at a lower, usable shaft speed. The "JS50" designation indicates a standardized 50mm outer diameter gearbox frame casing, making it a reliable choice for automated display stands, valve controllers, and heavy hobby robotics.

Specifications

• Model Number: JS50-385
• Motor Core Type: 385 Brushed DC (Carbon Brush for longer service life)
• Operating Voltage: 12V DC (Typical operational range: 6V - 15V)
• Raw Motor Speed: Approx 12,000RPM (at 12V before reduction)
• Gearbox Diameter: 50mm (Flat circular profile)
• Shaft Configuration: Standard D-cut output shaft (prevents gear slippage under load)
• Rotation Direction: Bidirectional / Reversible (By swapping power polarity)
• Material: Full metal gears or heavy-duty engineering polymer gears (variant dependent)
• Current Draw:
  • No-Load: Approx 150mA - 250mA
  • Stall (Peak Load): Approx 2.5A - 4.0A (Ensure power supplies can manage this spike)

Features

• Compact Form Factor with Flat Profile: The JS50 housing uses a specialized flat-pancake gearbox arrangement. This allows it to pack extreme torque conversion while maintaining a very short axial length, fitting easily into shallow chassis spaces.
• D-Shape Output Drive Shaft: The output shaft features a flat flat-ground side. This ensures that grub screws on wheels, levers, pulleys, or couplers secure tightly without spinning loosely under high pressure.
• High-Life Carbon Brushes: Unlike cheap miniature toy motors that utilize fragile copper leaf brushes, the internal 385 motor relies on solid carbon brushes, allowing it to handle superior electrical loads, resist degradation, and deliver extended service lifetimes.
• Simple Dynamic Reversibility: Reversing direction is as straightforward as swapping the positive (+) and negative (-) supply wires at the rear terminal solder points.

Common Applications

• Automated Display Rotators: Powering heavy rotating jewelry cases, point-of-sale display trays, and exhibition turntables.
• Smart Appliances & Automation: Operating automatic vending machine dispensers, motorized valve openers, and curtain rollers.
• Heavy Combat & All-Terrain Robotics: Driving the high-torque wheel bases of mid-sized exploration robots or remote-control machinery.
• Industrial Indexers: Moving lightweight conveyor belts, sorting gates, or automated testing jigs in production facilities.

Usage & Safety Tips

• Plan for Stall Spikes: Always choose an electronic speed controller (ESC) or power supply that matches or exceeds the motor's peak stall current (Approx 4A), rather than its running no-load current. If your power delivery system drops out at 1A, the motor will stall and cut out the moment it faces physical resistance.
• Protect the Internal Gearbox: Do not over-torque or force the output shaft to a hard mechanical stop while running at full voltage. If the output shaft is completely locked while the motor tries to rotate, the internal gear teeth can strip or fracture.
• Back-EMF Diode Safeguard: If you are operating this motor directly through a simple transistor or mechanical relay, place a standard flywheel diode (e.g., 1N4007 or 1N5408) across the terminals (facing away from ground) to absorb harmful voltage feedback spikes when shutting off the inductive motor core.