Common Issues and Solutions for Worm Gear Motor JGY-370 Dual Output Shaft
1. Problem Statement
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Self-locking Failure
User feedback: After power-off, the JGY-370 fails to hold its load position, causing "creep" or unintended movement. -
Output Shaft Concentricity Deviation
Post-assembly, excessive runout on the dual output shafts leads to vibration or noise in connected components (e.g., couplings, gearboxes). -
Insufficient Torque or Speed Mismatch
At 6V/12V/24V, actual output torque deviates from rated values, resulting in inadequate power for loads like curtains or jacks. -
Excessive Temperature Rise
After prolonged operation, the motor housing exceeds 60°C, risking insulation degradation and shortened lifespan.
2. Root Cause Analysis
| Issue | Possible Cause | Critical Impact |
|---|---|---|
| Self-locking Failure | Incorrect worm helix angle or insufficient lubrication | Load cannot be held, safety hazard |
| Concentricity Deviation | Machining inaccuracy or assembly error | Accelerated wear, increased noise |
| Torque/Speed Mismatch | Voltage fluctuation, gearbox wear, or incorrect selection | Load fails to start or runs unstably |
| High Temperature | Overload, poor heat dissipation, or bearing lubrication failure | Insulation aging, reduced motor life |
3. Solutions
1. Self-locking Optimization
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Helix Angle Check: Standard JGY-370 helix angle is 5°–7°. Replace worm if >8°.
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Lubrication Maintenance: Use high-temperature lithium grease (NLGI 2), replenish every 500 hours.
2. Concentricity Correction
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Assembly Process: Fix one bearing housing first, measure runout on the opposite shaft with a dial indicator, adjust to ≤0.05mm.
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Bearing Selection: Prioritize P5-grade precision bearings to minimize radial play.
3. Torque/Speed Matching
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Voltage Verification: Input voltage fluctuation must be within ±5% to avoid torque drop.
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Load Testing: For curtains, reserve 30% torque margin; for jacks, ensure peak torque ≥ 1.5× rated value.
4. Temperature Control
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Heat Dissipation: Add aluminum fins or forced-air cooling (e.g., 40mm fan).
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Duty Cycle: Limit continuous operation to 4 hours; use intermittent duty (S3) for longer life.
4. User Case Study
A smart home manufacturer used JGY-370 for electric curtains, initially facing self-locking failure. Replacing the worm with a 6° helix angle and adding self-lubricating bearings resolved the issue, reducing noise by 20%.
5. Conclusion
The JGY-370’s performance hinges on assembly precision and operating conditions. Focus on self-locking reliability, concentricity, torque matching, and heat dissipation. Tailor optimizations to load characteristics for enhanced stability and longevity.