This is a Geared Reversible Motor, a compact and precise AC power system designed for applications requiring controlled speed, torque, and reliable forward/reverse operation. It combines a reversible motor with a gearhead to reduce speed and increase output torque.
1. 2RJ4GB-A Reversible Motor
This is the power and control unit.
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Series (2RJ): Oriental Motor’s standard “2RJ” series of reversible motors. Known for reliability and quiet operation.
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Specifications (4GB):
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Voltage: Likely 100-115VAC, single-phase (common for this series). The “4” often indicates a specific voltage/frame size combination.
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Frequency: 50/60 Hz compatible.
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Power: Typically in the range of 3W to 6W (fractional horsepower).
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Reversible Function: Contains a built-in capacitor and wiring for instantaneous forward and reverse rotation by switching the power leads to a dedicated control circuit or switch.
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Winding Code (A): Specifies a particular winding configuration for a specific speed (likely 1500 RPM or 3000 RPM at no-load, 50/60Hz). “A” is a common code for a standard high-speed winding.
2. 2GB30L Gear Head
This is the speed reducer and torque amplifier.
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Series (2GB): A parallel-shaft (spur) gearhead series from Oriental Motor, known for its compact size, durability, and cost-effectiveness.
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Gear Ratio (30): The gear ratio is 30:1. This means the output shaft of the gearhead rotates 30 times slower than the input shaft from the motor, while the torque is increased by approximately 30 times (minus efficiency losses).
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Output Shaft Type (L): The “L” is crucial. It denotes a “Long Shaft” version. This means the gearhead’s output shaft is longer than the standard version, which is often necessary for mounting fans, pulleys, or other components that require extra space for set screws or through-holes.
3. WR9 1S04903
This is the specific product code and likely includes assembly & wiring details.
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WR9: This is the assembled product code. When you order “WR9,” you receive the motor and gearhead already coupled and aligned at the factory. This ensures optimal performance and saves installation time.
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1S04903: This is the specific factory assembly code or production lot code. It ties this exact unit to its manufacturing specifications for the complete assembly (motor + gearhead).
Key Performance Characteristics:
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Output Speed: With a 1500 RPM motor and a 30:1 gear ratio, the approximate output speed would be ~50 RPM (at 50Hz) or ~60 RPM (at 60Hz).
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Output Torque: Depending on the motor’s wattage, the gearhead’s rated torque is likely in the range of 0.3 to 0.5 Nm.
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Duty Cycle: Suitable for continuous operation.
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Braking: No electromagnetic brake. The motor stops by cutting power (coasting stop). For holding, you would need a separate brake unit or a different motor type.
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Control: Requires a simple 3-wire (Forward/Off/Reverse) switch or a dedicated reversible motor controller for proper operation.
Typical Applications:
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Automated displays, rotating stands
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Small conveyor belts
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Dampers and louver actuators
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Vending machine mechanisms
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Packaging equipment
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Any application requiring low-speed, reversible, and compact mecFhanical motion.
