The 5RK60A-AMF is a single-phase, capacitor-start, induction motor with an integral electromagnetic fail-safe brake. It is part of Oriental Motor’s extensive “RK” series, known for its durability and performance in frequent start-stop operations. The brake is designed to hold a load securely when power is cut off, making it ideal for vertical motion, safety covers, indexing, or emergency stopping.
Key Features & Specifications
1. Motor Section:
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Motor Type: Single-Phase AC Induction Motor (Capacitor Start).
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Output Power: 40W (0.04kW / ~1/20 HP).
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Voltage: Standard models are typically 100-115VAC, 50/60Hz. (Always verify on the specific nameplate).
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Speed: Approximately 1350 rpm at 50Hz / 1600 rpm at 60Hz (full-load speed).
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Insulation Class: Class B (standard for general use).
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Duty Cycle: Continuous (S1).
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Protection: Totally Enclosed, Fan Cooled (TEFC). Protects against dust and light moisture.
2. Brake Section (Electromagnetic):
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Type: Fail-Safe (Power-Off) Brake. The brake engages (stops/holds the motor) when the power is disconnected. It releases only when voltage is applied to the brake coil.
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Brake Torque: Approximately 0.5 N·m (varies slightly between models; a key specification for holding capability).
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Construction: Non-excitation actuation type. Uses a DC rectified power supply from the AC input.
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Response Time: Extremely fast. Typical braking time (from power-off to full stop) is around 0.02 to 0.05 seconds. Release time is similarly fast.
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Purpose: Provides holding force to prevent shaft rotation when stopped and ensures rapid, precise stopping.
3. Mechanical & Dimensional:
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Frame Size: 60mm square flange.
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Shaft: Keyed shaft (typically 8mm diameter with a single flat/keyway) for positive drive connection.
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Mounting: Standard foot mounting or face/flange mounting (depending on the exact suffix; “-AMF” often indicates a specific mounting configuration).
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Gear Options: While the “5RK60A” base is a direct drive, Oriental Motor often pairs this motor with matching gearboxes (e.g., parallel shaft or right-angle) to create a gearmotor with brake. The “A” in the part number can denote a specific shaft or winding variant.
4. Application Examples:
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Packaging Machinery: Indexing conveyor belts, film cutting.
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Material Handling: Small lifting devices, elevator tables, stopper gates.
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Food & Medical Equipment: Actuators for doors, covers, or precise dispensing.
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Automation: Positioning in assembly machines, rotary tables.
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Safety: Holding a load in place to prevent dropping due to power failure (e.g., on a Z-axis).
Important Considerations for Use & Selection
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Wiring: Requires correct connection of both motor terminals (for run winding and capacitor) and brake terminals. Incorrect wiring can damage the brake.
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Brake Life: The mechanical brake has a finite life based on operating frequency (cycles). For very high-cycle applications, consult derating curves.
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Gearmotor Versions: The “5RK60” platform is commonly integrated with gearheads. The full part number would then look like 5RK60GN-AMF+[Gearbox Code], where GN indicates the motor with brake.
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Control: To use the brake, a simple control circuit is needed where power to the motor and brake are coordinated (usually controlled via a relay or contactor). The brake often receives rectified DC voltage from a built-in or external rectifier.
